Škapin, Srečo Davor

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Authority KeyName Variants
4d4c63ab-f43c-46e5-a03d-80029ab3d6ad
  • Škapin, Srečo Davor (40)
Projects
Molecular designing of nanoparticles with controlled morphological and physicochemical characteristics and functional materials based on them Magnetic and radionuclide labeled nanostructured materials for medical applications
Size-, shape- and structure- dependent properties of nanoparticles and nanocomposites Lithium-ion batteries and fuel cells - research and development
Bilateral Cooperation Project between the Republic of Slovenia and the Republic of Serbia Investigation of intermetallics and semiconductors and possible application in renewable energy sources
Application of biotechnological methods for sustainable exploitation of by-products of agro-industry National Institute of Health grant R00-DE021416
Desai Lab at UCSF, NIH [K99-DE021416] Rational design and synthesis of biologically active and coordination compounds and functional materials, relevant for (bio)nanotechnology
Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications Nanostructured multifunctional materials and nanocomposites
Materials of Reduced Dimensions for Efficient Light Harvesting and Energy conversion Ministry of Science and Environmental Protection of the Republic of Serbia [142006], Serbian-Slovenian Bilateral Scientific Collaboration
Ministry of Science and Technological Development of the Republic of Serbia [142006] Ministry of Science and Technological Development of the Republic of Serbia [142006], Serbian-Slovenian Bilateral Scientific Collaboration

Author's Bibliography

Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder

Jugović, Dragana; Milović, Miloš; Popović, Maja; Kusigerski, Vladan; Škapin, Srečo Davor; Rakočević, Zlatko Lj.; Mitrić, Miodrag

(2019)

TY  - JOUR
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Popović, Maja
AU  - Kusigerski, Vladan
AU  - Škapin, Srečo Davor
AU  - Rakočević, Zlatko Lj.
AU  - Mitrić, Miodrag
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0925838818336375
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7897
AB  - The main goal of this research has been to investigate for the first time the effects of fluorination on the crystal structure, magnetic, and electrochemical properties of the P2-type NaxCoO2 powder. Sodium cobalt oxide with a P2-type structure is synthesized by a modified solid-state reaction consisting of alternating processes of rapid heating up to 750 °C and rapid cooling to the room temperature. The obtained powder is fluorinated using a gas-solid reaction with NH4HF2 as fluorinating agent. Fluorination causes a decrease of sodium content in the parent phase with the concurrent formation of the minor phases of Na2CO3 and NaF. The structure of NaxCoO2 in both powders is refined in P63/mmc space group. The results of the Rietveld refinement combined with the findings from the XPS measurements confirm the Na0.76CoO2 and Na0.44CoO1.96F0.04 stoichiometries for the pristine and fluorinated powders, respectively, which indicates that 4 at.% of fluorine ions per formula unit are incorporated in the structure. Preliminary electrochemical investigations have revealed an improved charge/discharge performance. The influence of fluorination on morphology and magnetic properties has also been examined. © 2018 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder
VL  - 774
SP  - 30
EP  - 37
DO  - 10.1016/j.jallcom.2018.09.372
ER  - 
@article{
author = "Jugović, Dragana and Milović, Miloš and Popović, Maja and Kusigerski, Vladan and Škapin, Srečo Davor and Rakočević, Zlatko Lj. and Mitrić, Miodrag",
year = "2019",
url = "https://linkinghub.elsevier.com/retrieve/pii/S0925838818336375, http://vinar.vin.bg.ac.rs/handle/123456789/7897",
abstract = "The main goal of this research has been to investigate for the first time the effects of fluorination on the crystal structure, magnetic, and electrochemical properties of the P2-type NaxCoO2 powder. Sodium cobalt oxide with a P2-type structure is synthesized by a modified solid-state reaction consisting of alternating processes of rapid heating up to 750 °C and rapid cooling to the room temperature. The obtained powder is fluorinated using a gas-solid reaction with NH4HF2 as fluorinating agent. Fluorination causes a decrease of sodium content in the parent phase with the concurrent formation of the minor phases of Na2CO3 and NaF. The structure of NaxCoO2 in both powders is refined in P63/mmc space group. The results of the Rietveld refinement combined with the findings from the XPS measurements confirm the Na0.76CoO2 and Na0.44CoO1.96F0.04 stoichiometries for the pristine and fluorinated powders, respectively, which indicates that 4 at.% of fluorine ions per formula unit are incorporated in the structure. Preliminary electrochemical investigations have revealed an improved charge/discharge performance. The influence of fluorination on morphology and magnetic properties has also been examined. © 2018 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder",
volume = "774",
pages = "30-37",
doi = "10.1016/j.jallcom.2018.09.372"
}
Jugović, D., Milović, M., Popović, M., Kusigerski, V., Škapin, S. D., Rakočević, Z. Lj.,& Mitrić, M. (2019). Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder.
Journal of Alloys and Compounds, 774, 30-37.
https://doi.org/10.1016/j.jallcom.2018.09.372
Jugović D, Milović M, Popović M, Kusigerski V, Škapin SD, Rakočević ZL, Mitrić M. Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder. Journal of Alloys and Compounds. 2019;774:30-37
Jugović Dragana, Milović Miloš, Popović Maja, Kusigerski Vladan, Škapin Srečo Davor, Rakočević Zlatko Lj., Mitrić Miodrag, "Effects of fluorination on the structure, magnetic and electrochemical properties of the P2-type NaxCoO2 powder" Journal of Alloys and Compounds, 774 (2019):30-37,
https://doi.org/10.1016/j.jallcom.2018.09.372 .
5
8
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Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose

Jugović, Dragana; Mitrić, Miodrag; Milović, Miloš; Ivanovski, Valentin N.; Škapin, Srečo Davor; Dojčinović, Biljana P.; Uskoković, Dragan

(2019)

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Ivanovski, Valentin N.
AU  - Škapin, Srečo Davor
AU  - Dojčinović, Biljana P.
AU  - Uskoković, Dragan
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8052
AB  - A new method involving the homogeneous dispersion of precursor compounds inside a methylcellulose matrix is used for the synthesis of a composite powder of Li 2 FeP 2 O 7 and carbon. The properties of carbon-containing and carbon-free powders are studied by X-ray powder diffraction (XRD) including Rietveld refinement, Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), galvanostatic cycling, and electrochemical impedance spectroscopy (EIS). The structure of both powders is refined in a monoclinic framework (space group P2 1 /c). The structural refinement and Mössbauer spectroscopy reveal different degrees of partial occupancy of mixed-occupied sites by lithium. Electrochemical measurements show that the in situ formation of carbon improves capacity (90% of 1-electron theoretical capacity) through decreased charge-transfer resistance. © 2019 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose
VL  - 786
SP  - 912
EP  - 919
DO  - 10.1016/j.jallcom.2019.01.392
ER  - 
@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Ivanovski, Valentin N. and Škapin, Srečo Davor and Dojčinović, Biljana P. and Uskoković, Dragan",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8052",
abstract = "A new method involving the homogeneous dispersion of precursor compounds inside a methylcellulose matrix is used for the synthesis of a composite powder of Li 2 FeP 2 O 7 and carbon. The properties of carbon-containing and carbon-free powders are studied by X-ray powder diffraction (XRD) including Rietveld refinement, Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), galvanostatic cycling, and electrochemical impedance spectroscopy (EIS). The structure of both powders is refined in a monoclinic framework (space group P2 1 /c). The structural refinement and Mössbauer spectroscopy reveal different degrees of partial occupancy of mixed-occupied sites by lithium. Electrochemical measurements show that the in situ formation of carbon improves capacity (90% of 1-electron theoretical capacity) through decreased charge-transfer resistance. © 2019 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose",
volume = "786",
pages = "912-919",
doi = "10.1016/j.jallcom.2019.01.392"
}
Jugović, D., Mitrić, M., Milović, M., Ivanovski, V. N., Škapin, S. D., Dojčinović, B. P.,& Uskoković, D. (2019). Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose.
Journal of Alloys and Compounds, 786, 912-919.
https://doi.org/10.1016/j.jallcom.2019.01.392
Jugović D, Mitrić M, Milović M, Ivanovski VN, Škapin SD, Dojčinović BP, Uskoković D. Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose. Journal of Alloys and Compounds. 2019;786:912-919
Jugović Dragana, Mitrić Miodrag, Milović Miloš, Ivanovski Valentin N., Škapin Srečo Davor, Dojčinović Biljana P., Uskoković Dragan, "Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose" Journal of Alloys and Compounds, 786 (2019):912-919,
https://doi.org/10.1016/j.jallcom.2019.01.392 .
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1
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Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose

Jugović, Dragana; Mitrić, Miodrag; Milović, Miloš; Ivanovski, Valentin N.; Škapin, Srečo Davor; Dojčinović, Biljana P.; Uskoković, Dragan

(2019)

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Ivanovski, Valentin N.
AU  - Škapin, Srečo Davor
AU  - Dojčinović, Biljana P.
AU  - Uskoković, Dragan
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8047
AB  - A new method involving the homogeneous dispersion of precursor compounds inside a methylcellulose matrix is used for the synthesis of a composite powder of Li 2 FeP 2 O 7 and carbon. The properties of carbon-containing and carbon-free powders are studied by X-ray powder diffraction (XRD) including Rietveld refinement, Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), galvanostatic cycling, and electrochemical impedance spectroscopy (EIS). The structure of both powders is refined in a monoclinic framework (space group P2 1 /c). The structural refinement and Mössbauer spectroscopy reveal different degrees of partial occupancy of mixed-occupied sites by lithium. Electrochemical measurements show that the in situ formation of carbon improves capacity (90% of 1-electron theoretical capacity) through decreased charge-transfer resistance. © 2019 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose
VL  - 786
SP  - 912
EP  - 919
DO  - 10.1016/j.jallcom.2019.01.392
ER  - 
@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Ivanovski, Valentin N. and Škapin, Srečo Davor and Dojčinović, Biljana P. and Uskoković, Dragan",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8047",
abstract = "A new method involving the homogeneous dispersion of precursor compounds inside a methylcellulose matrix is used for the synthesis of a composite powder of Li 2 FeP 2 O 7 and carbon. The properties of carbon-containing and carbon-free powders are studied by X-ray powder diffraction (XRD) including Rietveld refinement, Mössbauer spectroscopy, Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FESEM), galvanostatic cycling, and electrochemical impedance spectroscopy (EIS). The structure of both powders is refined in a monoclinic framework (space group P2 1 /c). The structural refinement and Mössbauer spectroscopy reveal different degrees of partial occupancy of mixed-occupied sites by lithium. Electrochemical measurements show that the in situ formation of carbon improves capacity (90% of 1-electron theoretical capacity) through decreased charge-transfer resistance. © 2019 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose",
volume = "786",
pages = "912-919",
doi = "10.1016/j.jallcom.2019.01.392"
}
Jugović, D., Mitrić, M., Milović, M., Ivanovski, V. N., Škapin, S. D., Dojčinović, B. P.,& Uskoković, D. (2019). Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose.
Journal of Alloys and Compounds, 786, 912-919.
https://doi.org/10.1016/j.jallcom.2019.01.392
Jugović D, Mitrić M, Milović M, Ivanovski VN, Škapin SD, Dojčinović BP, Uskoković D. Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose. Journal of Alloys and Compounds. 2019;786:912-919
Jugović Dragana, Mitrić Miodrag, Milović Miloš, Ivanovski Valentin N., Škapin Srečo Davor, Dojčinović Biljana P., Uskoković Dragan, "Structural and electrochemical properties of the Li2FeP2O7/C composite prepared using soluble methylcellulose" Journal of Alloys and Compounds, 786 (2019):912-919,
https://doi.org/10.1016/j.jallcom.2019.01.392 .
2
1
2

Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging

Ignjatović, Nenad L.; Mančić, Lidija; Vuković, Marina; Stojanović, Zoran S.; Nikolić, Marko G.; Škapin, Srečo Davor; Jovanović, Sonja; Veselinović, Ljiljana M.; Uskoković, Vuk; Lazić, Snežana; Marković, Smilja; Lazarević, Miloš M.; Uskoković, Dragan

(2019)

TY  - JOUR
AU  - Ignjatović, Nenad L.
AU  - Mančić, Lidija
AU  - Vuković, Marina
AU  - Stojanović, Zoran S.
AU  - Nikolić, Marko G.
AU  - Škapin, Srečo Davor
AU  - Jovanović, Sonja
AU  - Veselinović, Ljiljana M.
AU  - Uskoković, Vuk
AU  - Lazić, Snežana
AU  - Marković, Smilja
AU  - Lazarević, Miloš M.
AU  - Uskoković, Dragan
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8625
AB  - Taking advantage of the flexibility of the apatite structure, nano- and micro-particles of hydroxyapatite (HAp) were doped with different combinations of rare earth ions (RE3+ = Gd, Eu, Yb, Tm) to achieve a synergy among their magnetic and optical properties and to enable their application in preventive medicine, particularly diagnostics based on multimodal imaging. All powders were synthesized through hydrothermal processing at T ≤ 200 °C. An X-ray powder diffraction analysis showed that all powders crystallized in P63/m space group of the hexagonal crystal structure. The refined unit-cell parameters reflected a decrease in the unit cell volume as a result of the partial substitution of Ca2+ with smaller RE3+ ions at both cation positions. The FTIR analysis additionally suggested that a synergy may exist solely in the triply doped system, where the lattice symmetry and vibration modes become more coherent than in the singly or doubly doped systems. HAp:RE3+ optical characterization revealed a change in the energy band gap and the appearance of a weak blue luminescence (λex = 370 nm) due to an increased concentration of defects. The “up”- and the “down”-conversion spectra of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders showed characteristic transitions of Tm3+ and Eu3+, respectively. Furthermore, in contrast to diamagnetic HAp, all HAp:RE3+ powders exhibited paramagnetic behavior. Cell viability tests of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders in human dental pulp stem cell cultures indicated their good biocompatibility. © 2019, The Author(s).
T2  - Scientific Reports
T1  - Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging
VL  - 9
IS  - 1
SP  - 16305
DO  - 10.1038/s41598-019-52885-0
ER  - 
@article{
author = "Ignjatović, Nenad L. and Mančić, Lidija and Vuković, Marina and Stojanović, Zoran S. and Nikolić, Marko G. and Škapin, Srečo Davor and Jovanović, Sonja and Veselinović, Ljiljana M. and Uskoković, Vuk and Lazić, Snežana and Marković, Smilja and Lazarević, Miloš M. and Uskoković, Dragan",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8625",
abstract = "Taking advantage of the flexibility of the apatite structure, nano- and micro-particles of hydroxyapatite (HAp) were doped with different combinations of rare earth ions (RE3+ = Gd, Eu, Yb, Tm) to achieve a synergy among their magnetic and optical properties and to enable their application in preventive medicine, particularly diagnostics based on multimodal imaging. All powders were synthesized through hydrothermal processing at T ≤ 200 °C. An X-ray powder diffraction analysis showed that all powders crystallized in P63/m space group of the hexagonal crystal structure. The refined unit-cell parameters reflected a decrease in the unit cell volume as a result of the partial substitution of Ca2+ with smaller RE3+ ions at both cation positions. The FTIR analysis additionally suggested that a synergy may exist solely in the triply doped system, where the lattice symmetry and vibration modes become more coherent than in the singly or doubly doped systems. HAp:RE3+ optical characterization revealed a change in the energy band gap and the appearance of a weak blue luminescence (λex = 370 nm) due to an increased concentration of defects. The “up”- and the “down”-conversion spectra of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders showed characteristic transitions of Tm3+ and Eu3+, respectively. Furthermore, in contrast to diamagnetic HAp, all HAp:RE3+ powders exhibited paramagnetic behavior. Cell viability tests of HAp:Gd/Yb/Tm and HAp:Gd/Eu powders in human dental pulp stem cell cultures indicated their good biocompatibility. © 2019, The Author(s).",
journal = "Scientific Reports",
title = "Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging",
volume = "9",
number = "1",
pages = "16305",
doi = "10.1038/s41598-019-52885-0"
}
Ignjatović, N. L., Mančić, L., Vuković, M., Stojanović, Z. S., Nikolić, M. G., Škapin, S. D., Jovanović, S., Veselinović, L. M., Uskoković, V., Lazić, S., Marković, S., Lazarević, M. M.,& Uskoković, D. (2019). Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging.
Scientific Reports, 9(1), 16305.
https://doi.org/10.1038/s41598-019-52885-0
Ignjatović NL, Mančić L, Vuković M, Stojanović ZS, Nikolić MG, Škapin SD, Jovanović S, Veselinović LM, Uskoković V, Lazić S, Marković S, Lazarević MM, Uskoković D. Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging. Scientific Reports. 2019;9(1):16305
Ignjatović Nenad L., Mančić Lidija, Vuković Marina, Stojanović Zoran S., Nikolić Marko G., Škapin Srečo Davor, Jovanović Sonja, Veselinović Ljiljana M., Uskoković Vuk, Lazić Snežana, Marković Smilja, Lazarević Miloš M., Uskoković Dragan, "Rare-earth (Gd3+,Yb3+/Tm3+, Eu3+) co-doped hydroxyapatite as magnetic, up-conversion and down-conversion materials for multimodal imaging" Scientific Reports, 9, no. 1 (2019):16305,
https://doi.org/10.1038/s41598-019-52885-0 .
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Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites

Stamenović, Una; Vodnik, Vesna; Gavrilov, Nemanja M.; Pašti, Igor A.; Otončar, Mojca; Mitrić, Miodrag; Škapin, Srečo Davor

(2019)

TY  - JOUR
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Gavrilov, Nemanja M.
AU  - Pašti, Igor A.
AU  - Otončar, Mojca
AU  - Mitrić, Miodrag
AU  - Škapin, Srečo Davor
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8512
AB  - There is a need for developing new and perspective materials for oxygen reduction reaction (ORR) as one of the most essential reactions in the life processes, energy storage, and conversion, in order to exchange the most often used materials based on platinum supported/unsupported substrates, especially carbon supports. Herein, we present low-cost alternative electrode materials consisting of two silver@polyvinylpyrrolidone-polyaniline (Ag@PVP-PANI) nanocomposites that showed great potential as Pt-free ORR electrocatalysts. Simple and effective polymerization processes of aniline in the methanol, using PVP as shape-mediated stabilizator and stimulator of its oxidation by silver ions, led to the formation of nanocomposites with truncated triangular silver nanoparticles dispersed throughout granular and wrinkle-like surfaces of PANI matrix. The behavior of PVP chains in acidic conditions showed great influence on nanocomposites’ conductivities, regardless of the high silver content. Electrocatalytic survey of nanocomposites examined in alkaline media toward ORR pointed out their appreciable activities with high ORR onset potentials. Moreover, for the nanocomposite with lower silver content (18.9 wt. %), the four-electron ORR pathway was evidenced. © 2019 Elsevier B.V.
T2  - Synthetic Metals
T1  - Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites
VL  - 257
SP  - 116173
DO  - 10.1016/j.synthmet.2019.116173
ER  - 
@article{
author = "Stamenović, Una and Vodnik, Vesna and Gavrilov, Nemanja M. and Pašti, Igor A. and Otončar, Mojca and Mitrić, Miodrag and Škapin, Srečo Davor",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8512",
abstract = "There is a need for developing new and perspective materials for oxygen reduction reaction (ORR) as one of the most essential reactions in the life processes, energy storage, and conversion, in order to exchange the most often used materials based on platinum supported/unsupported substrates, especially carbon supports. Herein, we present low-cost alternative electrode materials consisting of two silver@polyvinylpyrrolidone-polyaniline (Ag@PVP-PANI) nanocomposites that showed great potential as Pt-free ORR electrocatalysts. Simple and effective polymerization processes of aniline in the methanol, using PVP as shape-mediated stabilizator and stimulator of its oxidation by silver ions, led to the formation of nanocomposites with truncated triangular silver nanoparticles dispersed throughout granular and wrinkle-like surfaces of PANI matrix. The behavior of PVP chains in acidic conditions showed great influence on nanocomposites’ conductivities, regardless of the high silver content. Electrocatalytic survey of nanocomposites examined in alkaline media toward ORR pointed out their appreciable activities with high ORR onset potentials. Moreover, for the nanocomposite with lower silver content (18.9 wt. %), the four-electron ORR pathway was evidenced. © 2019 Elsevier B.V.",
journal = "Synthetic Metals",
title = "Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites",
volume = "257",
pages = "116173",
doi = "10.1016/j.synthmet.2019.116173"
}
Stamenović, U., Vodnik, V., Gavrilov, N. M., Pašti, I. A., Otončar, M., Mitrić, M.,& Škapin, S. D. (2019). Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites.
Synthetic Metals, 257, 116173.
https://doi.org/10.1016/j.synthmet.2019.116173
Stamenović U, Vodnik V, Gavrilov NM, Pašti IA, Otončar M, Mitrić M, Škapin SD. Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites. Synthetic Metals. 2019;257:116173
Stamenović Una, Vodnik Vesna, Gavrilov Nemanja M., Pašti Igor A., Otončar Mojca, Mitrić Miodrag, Škapin Srečo Davor, "Developing an advanced electrocatalyst derived from triangular silver nanoplates@polyvinylpyrrolidone-polyaniline nanocomposites" Synthetic Metals, 257 (2019):116173,
https://doi.org/10.1016/j.synthmet.2019.116173 .
1
1
1

Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation

Bogdanović, Una; Dimitrijević, Suzana I.; Škapin, Srečo Davor; Popović, Maja; Rakočević, Zlatko Lj.; Leskovac, Andreja; Petrović, Sandra; Stoiljković, Milovan; Vodnik, Vesna

(2018)

TY  - JOUR
AU  - Bogdanović, Una
AU  - Dimitrijević, Suzana I.
AU  - Škapin, Srečo Davor
AU  - Popović, Maja
AU  - Rakočević, Zlatko Lj.
AU  - Leskovac, Andreja
AU  - Petrović, Sandra
AU  - Stoiljković, Milovan
AU  - Vodnik, Vesna
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0928493117326449
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7799
AB  - Copper nanoparticles (Cu NPs) have proven to own excellent antimicrobial efficacy, but the problems of easy oxidation and aggregation limit their practical application. Here, nanocomposite based on polyaniline (PANI) and Cu NPs solved this problem and brought additional physicochemical properties that are markedly advantageous for antimicrobial applications. Current work exploits this potential, to examine its time- and concentration-dependent antimicrobial activity, employing E. coli, S. aureus, and C. albicans as a model microbial species. Regarding the presence of polaronic charge carriers in the fibrous polyaniline network, effects of Cu NPs’ size and their partially oxidized surfaces (the data were confirmed by HRTEM, FESEM, XRD, Raman and XPS analysis), as well as rapid copper ions release, Cu-PANI nanocomposite showed efficient bactericidal and fungicidal activities at the concentrations ≤1 ppm, within the incubation time of 2 h. Beside the quantitative analysis, the high levels of cellular disruption for all tested microbes were evidenced by atomic force microscopy. Moreover, the minimum inhibitory and bactericidal concentrations of the Cu-PANI nanocomposite were lower than those reported for other nanocomposites. Using such low concentrations is recognized as a good way to avoid its toxicity toward the environment. For this purpose, Cu-PANI nanocomposite is tested for its genotoxicity and influence on the oxidative status of the human cells in vitro.
T2  - Materials Science and Engineering: C
T1  - Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation
VL  - 93
SP  - 49
EP  - 60
DO  - 10.1016/j.msec.2018.07.067
ER  - 
@article{
author = "Bogdanović, Una and Dimitrijević, Suzana I. and Škapin, Srečo Davor and Popović, Maja and Rakočević, Zlatko Lj. and Leskovac, Andreja and Petrović, Sandra and Stoiljković, Milovan and Vodnik, Vesna",
year = "2018",
url = "https://linkinghub.elsevier.com/retrieve/pii/S0928493117326449, http://vinar.vin.bg.ac.rs/handle/123456789/7799",
abstract = "Copper nanoparticles (Cu NPs) have proven to own excellent antimicrobial efficacy, but the problems of easy oxidation and aggregation limit their practical application. Here, nanocomposite based on polyaniline (PANI) and Cu NPs solved this problem and brought additional physicochemical properties that are markedly advantageous for antimicrobial applications. Current work exploits this potential, to examine its time- and concentration-dependent antimicrobial activity, employing E. coli, S. aureus, and C. albicans as a model microbial species. Regarding the presence of polaronic charge carriers in the fibrous polyaniline network, effects of Cu NPs’ size and their partially oxidized surfaces (the data were confirmed by HRTEM, FESEM, XRD, Raman and XPS analysis), as well as rapid copper ions release, Cu-PANI nanocomposite showed efficient bactericidal and fungicidal activities at the concentrations ≤1 ppm, within the incubation time of 2 h. Beside the quantitative analysis, the high levels of cellular disruption for all tested microbes were evidenced by atomic force microscopy. Moreover, the minimum inhibitory and bactericidal concentrations of the Cu-PANI nanocomposite were lower than those reported for other nanocomposites. Using such low concentrations is recognized as a good way to avoid its toxicity toward the environment. For this purpose, Cu-PANI nanocomposite is tested for its genotoxicity and influence on the oxidative status of the human cells in vitro.",
journal = "Materials Science and Engineering: C",
title = "Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation",
volume = "93",
pages = "49-60",
doi = "10.1016/j.msec.2018.07.067"
}
Bogdanović, U., Dimitrijević, S. I., Škapin, S. D., Popović, M., Rakočević, Z. Lj., Leskovac, A., Petrović, S., Stoiljković, M.,& Vodnik, V. (2018). Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation.
Materials Science and Engineering: C, 93, 49-60.
https://doi.org/10.1016/j.msec.2018.07.067
Bogdanović U, Dimitrijević SI, Škapin SD, Popović M, Rakočević ZL, Leskovac A, Petrović S, Stoiljković M, Vodnik V. Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation. Materials Science and Engineering: C. 2018;93:49-60
Bogdanović Una, Dimitrijević Suzana I., Škapin Srečo Davor, Popović Maja, Rakočević Zlatko Lj., Leskovac Andreja, Petrović Sandra, Stoiljković Milovan, Vodnik Vesna, "Copper-polyaniline nanocomposite: Role of physicochemical properties on the antimicrobial activity and genotoxicity evaluation" Materials Science and Engineering: C, 93 (2018):49-60,
https://doi.org/10.1016/j.msec.2018.07.067 .
12
10
11

One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction

Stamenović, Una; Gavrilov, Nemanja M.; Pašti, Igor A.; Otoničar, Mojca; Ćirić-Marjanović, Gordana N.; Škapin, Srečo Davor; Mitrić, Miodrag; Vodnik, Vesna

(2018)

TY  - JOUR
AU  - Stamenović, Una
AU  - Gavrilov, Nemanja M.
AU  - Pašti, Igor A.
AU  - Otoničar, Mojca
AU  - Ćirić-Marjanović, Gordana N.
AU  - Škapin, Srečo Davor
AU  - Mitrić, Miodrag
AU  - Vodnik, Vesna
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0013468618312799
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7717
AB  - A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts.
T2  - Electrochimica Acta
T1  - One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction
VL  - 281
SP  - 549
EP  - 561
DO  - 10.1016/j.electacta.2018.05.202
ER  - 
@article{
author = "Stamenović, Una and Gavrilov, Nemanja M. and Pašti, Igor A. and Otoničar, Mojca and Ćirić-Marjanović, Gordana N. and Škapin, Srečo Davor and Mitrić, Miodrag and Vodnik, Vesna",
year = "2018",
url = "https://linkinghub.elsevier.com/retrieve/pii/S0013468618312799, http://vinar.vin.bg.ac.rs/handle/123456789/7717",
abstract = "A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts.",
journal = "Electrochimica Acta",
title = "One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction",
volume = "281",
pages = "549-561",
doi = "10.1016/j.electacta.2018.05.202"
}
Stamenović, U., Gavrilov, N. M., Pašti, I. A., Otoničar, M., Ćirić-Marjanović, G. N., Škapin, S. D., Mitrić, M.,& Vodnik, V. (2018). One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction.
Electrochimica Acta, 281, 549-561.
https://doi.org/10.1016/j.electacta.2018.05.202
Stamenović U, Gavrilov NM, Pašti IA, Otoničar M, Ćirić-Marjanović GN, Škapin SD, Mitrić M, Vodnik V. One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction. Electrochimica Acta. 2018;281:549-561
Stamenović Una, Gavrilov Nemanja M., Pašti Igor A., Otoničar Mojca, Ćirić-Marjanović Gordana N., Škapin Srečo Davor, Mitrić Miodrag, Vodnik Vesna, "One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction" Electrochimica Acta, 281 (2018):549-561,
https://doi.org/10.1016/j.electacta.2018.05.202 .
9
8
9

Synthesis and characterization of Li2FeP2O7 cathode material

Uskoković, Dragan; Radmilović, Velimir R.; Jugović, Dragana; Milović, Miloš; Mitrić, Miodrag; Cvjetićanin, Nikola; Škapin, Srečo Davor; Uskoković, Dragan

(Belgrade : Materials Research Society of Serbia, 2017)

TY  - CONF
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2017
UR  - http://itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/1208
UR  - http://itn.sanu.ac.rs/opus4/files/1208/Jugovic_YUCOMAT2017.pdf
UR  - http://dais.sanu.ac.rs/123456789/15439
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7560
AB  - The search for alternative cathode materials for Li-ion batteries has recently emerged Li2FeP2O7 pyrophosphate as a new potential competitor for LiFePO4 material. It has a possibility to offer good rate capability, lithium ion diffusivity and volumetric energy density, and is a material of high safety and low raw materials cost. In addition, there is the probability of releasing the second Li-atom at a higher redox potential of 5.2 V, where the theoretical capacity would reach 220 mAhg−1. Optimized solid state reaction is used for the synthesis of pure Li2FeP2O7 powder and a composite Li2FeP2O7/C. The synthesized powders are characterized by X-ray powder diffraction, field emission scanning electron microscopy, FTIR spectroscopy, and galvanostatic charge/discharge cycling.
PB  - Belgrade : Materials Research Society of Serbia
C3  - Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
T1  - Synthesis and characterization of Li2FeP2O7 cathode material
SP  - 46
EP  - 46
ER  - 
@conference{
editor = "Uskoković, Dragan, Radmilović, Velimir R.",
author = "Jugović, Dragana and Milović, Miloš and Mitrić, Miodrag and Cvjetićanin, Nikola and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2017",
url = "http://itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/1208, http://itn.sanu.ac.rs/opus4/files/1208/Jugovic_YUCOMAT2017.pdf, http://dais.sanu.ac.rs/123456789/15439, http://vinar.vin.bg.ac.rs/handle/123456789/7560",
abstract = "The search for alternative cathode materials for Li-ion batteries has recently emerged Li2FeP2O7 pyrophosphate as a new potential competitor for LiFePO4 material. It has a possibility to offer good rate capability, lithium ion diffusivity and volumetric energy density, and is a material of high safety and low raw materials cost. In addition, there is the probability of releasing the second Li-atom at a higher redox potential of 5.2 V, where the theoretical capacity would reach 220 mAhg−1. Optimized solid state reaction is used for the synthesis of pure Li2FeP2O7 powder and a composite Li2FeP2O7/C. The synthesized powders are characterized by X-ray powder diffraction, field emission scanning electron microscopy, FTIR spectroscopy, and galvanostatic charge/discharge cycling.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017",
title = "Synthesis and characterization of Li2FeP2O7 cathode material",
pages = "46-46"
}
Uskoković, D., Radmilović, V. R., Jugović, D., Milović, M., Mitrić, M., Cvjetićanin, N., Škapin, S. D.,& Uskoković, D. (2017). Synthesis and characterization of Li2FeP2O7 cathode material.
Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 46-46.
Uskoković D, Radmilović VR, Jugović D, Milović M, Mitrić M, Cvjetićanin N, Škapin SD, Uskoković D. Synthesis and characterization of Li2FeP2O7 cathode material. Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:46-46
Uskoković Dragan, Radmilović Velimir R., Jugović Dragana, Milović Miloš, Mitrić Miodrag, Cvjetićanin Nikola, Škapin Srečo Davor, Uskoković Dragan, "Synthesis and characterization of Li2FeP2O7 cathode material" Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):46-46

Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies

Stojanović, Zoran S.; Ignjatović, Nenad L.; Wu, Victoria; Žunič, Vojka; Veselinović, Ljiljana M.; Škapin, Srečo Davor; Miljković, Miroslav; Uskoković, Vuk; Uskoković, Dragan

(2016)

TY  - JOUR
AU  - Stojanović, Zoran S.
AU  - Ignjatović, Nenad L.
AU  - Wu, Victoria
AU  - Žunič, Vojka
AU  - Veselinović, Ljiljana M.
AU  - Škapin, Srečo Davor
AU  - Miljković, Miroslav
AU  - Uskoković, Vuk
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7575
AB  - Recent developments in bone tissue engineering have led to an increased interest in one-dimensional (1D) hydroxyapatite (HA) nano- and micro-structures such as wires, ribbons and tubes. They have been proposed for use as cell substrates, reinforcing phases in composites and carriers for biologically active substances. Here we demonstrate the synthesis of 1D HA structures using an optimized, urea-assisted, high-yield hydrothermal batch process. The one-pot process, yielding HA structures composed of bundles of ribbons and wires, was typified by the simultaneous occurrence of a multitude of intermediate reactions, failing to meet the uniformity criteria over particle morphology and size. To overcome these issues, the preparation procedure was divided to two stages: dicalcium phosphate platelets synthesized in the first step were used as a precursor for the synthesis of 1D HA in the second stage. Despite the elongated particle morphologies, both the precursor and the final product exhibited excellent biocompatibility and caused no reduction of viability when tested against osteoblastic MC3T3-E1 cells in 2D culture up to the concentration of 2.6 mg/cm2. X-ray powder diffraction combined with a range of electron microscopies and laser diffraction analyses was used to elucidate the formation mechanism and the microstructure of the final particles. The two-step synthesis involved a more direct transformation of DCP to 1D HA with the average diameter of 37 nm and the aspect ratio exceeding 100:1. The comparison of crystalline domain sizes along different crystallographic directions showed no signs of significant anisotropy, while indicating that individual nanowires are ordered in bundles in the b crystallographic direction of the P63/m space group of HA. Intermediate processes, e.g., dehydration of dicalcium phosphate, are critical for the formation of 1D HA alongside other key aspects of this phase transformation, it must be investigated in more detail in the continuous design of smart HA micro- and nano-structures with advanced therapeutic potentials.
T2  - Materials Science and Engineering: C
T1  - Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies
VL  - 68
SP  - 746
EP  - 757
DO  - 10.1016/j.msec.2016.06.047
ER  - 
@article{
author = "Stojanović, Zoran S. and Ignjatović, Nenad L. and Wu, Victoria and Žunič, Vojka and Veselinović, Ljiljana M. and Škapin, Srečo Davor and Miljković, Miroslav and Uskoković, Vuk and Uskoković, Dragan",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/7575",
abstract = "Recent developments in bone tissue engineering have led to an increased interest in one-dimensional (1D) hydroxyapatite (HA) nano- and micro-structures such as wires, ribbons and tubes. They have been proposed for use as cell substrates, reinforcing phases in composites and carriers for biologically active substances. Here we demonstrate the synthesis of 1D HA structures using an optimized, urea-assisted, high-yield hydrothermal batch process. The one-pot process, yielding HA structures composed of bundles of ribbons and wires, was typified by the simultaneous occurrence of a multitude of intermediate reactions, failing to meet the uniformity criteria over particle morphology and size. To overcome these issues, the preparation procedure was divided to two stages: dicalcium phosphate platelets synthesized in the first step were used as a precursor for the synthesis of 1D HA in the second stage. Despite the elongated particle morphologies, both the precursor and the final product exhibited excellent biocompatibility and caused no reduction of viability when tested against osteoblastic MC3T3-E1 cells in 2D culture up to the concentration of 2.6 mg/cm2. X-ray powder diffraction combined with a range of electron microscopies and laser diffraction analyses was used to elucidate the formation mechanism and the microstructure of the final particles. The two-step synthesis involved a more direct transformation of DCP to 1D HA with the average diameter of 37 nm and the aspect ratio exceeding 100:1. The comparison of crystalline domain sizes along different crystallographic directions showed no signs of significant anisotropy, while indicating that individual nanowires are ordered in bundles in the b crystallographic direction of the P63/m space group of HA. Intermediate processes, e.g., dehydration of dicalcium phosphate, are critical for the formation of 1D HA alongside other key aspects of this phase transformation, it must be investigated in more detail in the continuous design of smart HA micro- and nano-structures with advanced therapeutic potentials.",
journal = "Materials Science and Engineering: C",
title = "Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies",
volume = "68",
pages = "746-757",
doi = "10.1016/j.msec.2016.06.047"
}
Stojanović, Z. S., Ignjatović, N. L., Wu, V., Žunič, V., Veselinović, L. M., Škapin, S. D., Miljković, M., Uskoković, V.,& Uskoković, D. (2016). Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies.
Materials Science and Engineering: C, 68, 746-757.
https://doi.org/10.1016/j.msec.2016.06.047
Stojanović ZS, Ignjatović NL, Wu V, Žunič V, Veselinović LM, Škapin SD, Miljković M, Uskoković V, Uskoković D. Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies. Materials Science and Engineering: C. 2016;68:746-757
Stojanović Zoran S., Ignjatović Nenad L., Wu Victoria, Žunič Vojka, Veselinović Ljiljana M., Škapin Srečo Davor, Miljković Miroslav, Uskoković Vuk, Uskoković Dragan, "Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies" Materials Science and Engineering: C, 68 (2016):746-757,
https://doi.org/10.1016/j.msec.2016.06.047 .
23
21
24

Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies

Stojanović, Zoran S.; Ignjatović, Nenad L.; Wu, Victoria; Žunič, Vojka; Veselinović, Ljiljana M.; Škapin, Srečo Davor; Miljković, Miroslav; Uskoković, Vuk; Uskoković, Dragan

(Elsevier, 2016)

TY  - JOUR
AU  - Stojanović, Zoran S.
AU  - Ignjatović, Nenad L.
AU  - Wu, Victoria
AU  - Žunič, Vojka
AU  - Veselinović, Ljiljana M.
AU  - Škapin, Srečo Davor
AU  - Miljković, Miroslav
AU  - Uskoković, Vuk
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7576
AB  - Recent developments in bone tissue engineering have led to an increased interest in one-dimensional (1D) hydroxyapatite (HA) nano- and micro-structures such as wires, ribbons and tubes. They have been proposed for use as cell substrates, reinforcing phases in composites and carriers for biologically active substances. Here we demonstrate the synthesis of 1D HA structures using an optimized, urea-assisted, high-yield hydrothermal batch process. The one-pot process, yielding HA structures composed of bundles of ribbons and wires, was typified by the simultaneous occurrence of a multitude of intermediate reactions, failing to meet the uniformity criteria over particle morphology and size. To overcome these issues, the preparation procedure was divided to two stages: dicalcium phosphate platelets synthesized in the first step were used as a precursor for the synthesis of 1D HA in the second stage. Despite the elongated particle morphologies, both the precursor and the final product exhibited excellent biocompatibility and caused no reduction of viability when tested against osteoblastic MC3T3-E1 cells in 2D culture up to the concentration of 2.6 mg/cm2. X-ray powder diffraction combined with a range of electron microscopies and laser diffraction analyses was used to elucidate the formation mechanism and the microstructure of the final particles. The two-step synthesis involved a more direct transformation of DCP to 1D HA with the average diameter of 37 nm and the aspect ratio exceeding 100:1. The comparison of crystalline domain sizes along different crystallographic directions showed no signs of significant anisotropy, while indicating that individual nanowires are ordered in bundles in the b crystallographic direction of the P63/m space group of HA. Intermediate processes, e.g., dehydration of dicalcium phosphate, are critical for the formation of 1D HA alongside other key aspects of this phase transformation, it must be investigated in more detail in the continuous design of smart HA micro- and nano-structures with advanced therapeutic potentials.
PB  - Elsevier
T2  - Materials Science and Engineering: C
T1  - Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies
VL  - 68
SP  - 746
EP  - 757
DO  - 10.1016/j.msec.2016.06.047
ER  - 
@article{
author = "Stojanović, Zoran S. and Ignjatović, Nenad L. and Wu, Victoria and Žunič, Vojka and Veselinović, Ljiljana M. and Škapin, Srečo Davor and Miljković, Miroslav and Uskoković, Vuk and Uskoković, Dragan",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/7576",
abstract = "Recent developments in bone tissue engineering have led to an increased interest in one-dimensional (1D) hydroxyapatite (HA) nano- and micro-structures such as wires, ribbons and tubes. They have been proposed for use as cell substrates, reinforcing phases in composites and carriers for biologically active substances. Here we demonstrate the synthesis of 1D HA structures using an optimized, urea-assisted, high-yield hydrothermal batch process. The one-pot process, yielding HA structures composed of bundles of ribbons and wires, was typified by the simultaneous occurrence of a multitude of intermediate reactions, failing to meet the uniformity criteria over particle morphology and size. To overcome these issues, the preparation procedure was divided to two stages: dicalcium phosphate platelets synthesized in the first step were used as a precursor for the synthesis of 1D HA in the second stage. Despite the elongated particle morphologies, both the precursor and the final product exhibited excellent biocompatibility and caused no reduction of viability when tested against osteoblastic MC3T3-E1 cells in 2D culture up to the concentration of 2.6 mg/cm2. X-ray powder diffraction combined with a range of electron microscopies and laser diffraction analyses was used to elucidate the formation mechanism and the microstructure of the final particles. The two-step synthesis involved a more direct transformation of DCP to 1D HA with the average diameter of 37 nm and the aspect ratio exceeding 100:1. The comparison of crystalline domain sizes along different crystallographic directions showed no signs of significant anisotropy, while indicating that individual nanowires are ordered in bundles in the b crystallographic direction of the P63/m space group of HA. Intermediate processes, e.g., dehydration of dicalcium phosphate, are critical for the formation of 1D HA alongside other key aspects of this phase transformation, it must be investigated in more detail in the continuous design of smart HA micro- and nano-structures with advanced therapeutic potentials.",
publisher = "Elsevier",
journal = "Materials Science and Engineering: C",
title = "Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies",
volume = "68",
pages = "746-757",
doi = "10.1016/j.msec.2016.06.047"
}
Stojanović, Z. S., Ignjatović, N. L., Wu, V., Žunič, V., Veselinović, L. M., Škapin, S. D., Miljković, M., Uskoković, V.,& Uskoković, D. (2016). Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies.
Materials Science and Engineering: C
Elsevier., 68, 746-757.
https://doi.org/10.1016/j.msec.2016.06.047
Stojanović ZS, Ignjatović NL, Wu V, Žunič V, Veselinović LM, Škapin SD, Miljković M, Uskoković V, Uskoković D. Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies. Materials Science and Engineering: C. 2016;68:746-757
Stojanović Zoran S., Ignjatović Nenad L., Wu Victoria, Žunič Vojka, Veselinović Ljiljana M., Škapin Srečo Davor, Miljković Miroslav, Uskoković Vuk, Uskoković Dragan, "Hydrothermally processed 1D hydroxyapatite: Mechanism of formation and biocompatibility studies" Materials Science and Engineering: C, 68 (2016):746-757,
https://doi.org/10.1016/j.msec.2016.06.047 .
23
21
23

Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites

Markovic, Smilja; Rajić, Vladimir; Stanković, Ana; Veselinovic, Ljiljana; Belošević-Čavor, Jelena; Batalović, Katarina; Abazović, Nadica; Škapin, Srečo Davor; Uskoković, Dragan

(2016)

TY  - JOUR
AU  - Markovic, Smilja
AU  - Rajić, Vladimir
AU  - Stanković, Ana
AU  - Veselinovic, Ljiljana
AU  - Belošević-Čavor, Jelena
AU  - Batalović, Katarina
AU  - Abazović, Nadica
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/963
AB  - ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550-800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12-0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Solar Energy
T1  - Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites
VL  - 127
SP  - 124
EP  - 135
DO  - 10.1016/j.solener.2016.01.026
ER  - 
@article{
author = "Markovic, Smilja and Rajić, Vladimir and Stanković, Ana and Veselinovic, Ljiljana and Belošević-Čavor, Jelena and Batalović, Katarina and Abazović, Nadica and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/963",
abstract = "ZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550-800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12-0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Solar Energy",
title = "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites",
volume = "127",
pages = "124-135",
doi = "10.1016/j.solener.2016.01.026"
}
Markovic, S., Rajić, V., Stanković, A., Veselinovic, L., Belošević-Čavor, J., Batalović, K., Abazović, N., Škapin, S. D.,& Uskoković, D. (2016). Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites.
Solar Energy, 127, 124-135.
https://doi.org/10.1016/j.solener.2016.01.026
Markovic S, Rajić V, Stanković A, Veselinovic L, Belošević-Čavor J, Batalović K, Abazović N, Škapin SD, Uskoković D. Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites. Solar Energy. 2016;127:124-135
Markovic Smilja, Rajić Vladimir, Stanković Ana, Veselinovic Ljiljana, Belošević-Čavor Jelena, Batalović Katarina, Abazović Nadica, Škapin Srečo Davor, Uskoković Dragan, "Effect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO composites" Solar Energy, 127 (2016):124-135,
https://doi.org/10.1016/j.solener.2016.01.026 .
8
10
10

Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite

Bogdanović, Una; Vodnik, Vesna; Mitrić, Miodrag; Dimitrijević, Suzana I.; Škapin, Srečo Davor; Zunic, Vojka; Budimir, Milica; Stoiljković, Milovan

(2015)

TY  - JOUR
AU  - Bogdanović, Una
AU  - Vodnik, Vesna
AU  - Mitrić, Miodrag
AU  - Dimitrijević, Suzana I.
AU  - Škapin, Srečo Davor
AU  - Zunic, Vojka
AU  - Budimir, Milica
AU  - Stoiljković, Milovan
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/376
AB  - This study explores different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach in the fight against resistant microbes. Here, we present a cheap copper-polyaniline (Cu-PANI) nanocomposite material with enhanced antimicrobial properties, prepared by simple in situ polymerization method, when polymer and metal nanoparticles are produced simultaneously. The copper nanoparticles (CuNPs) are uniformly dispersed in the polymer and have a narrow size distribution (dav = 6 nm). We found that CuNPs and PANI act synergistically against three strains, Escherichia coli, Staphylococcus aureus, and Candida albicans, and resulting nanocomposite exhibits higher antimicrobial activity than any component acting alone. Before using the colony counting method to quantify its time and concentration antimicrobial activity, different techniques (UV-visible spectroscopy, transmission electron microscopy, scanning electron microscope, field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectrophotometry, and inductively coupled plasma optical emission spectrometry) were used to identify the optical, structural, and chemical aspects of the formed Cu-PANI nanocomposite. The antimicrobial activity of this nanocomposite shows that the microbial growth has been fully inhibited; moreover, some of the tested microbes were killed. Atomic force microscopy revealed dramatic changes in morphology of tested cells due to disruption of their cell wall integrity after incubation with Cu-PANI nanocomposite.
T2  - ACS Applied Materials and Interfaces
T1  - Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite
VL  - 7
IS  - 3
SP  - 1955
EP  - 1966
DO  - 10.1021/am507746m
ER  - 
@article{
author = "Bogdanović, Una and Vodnik, Vesna and Mitrić, Miodrag and Dimitrijević, Suzana I. and Škapin, Srečo Davor and Zunic, Vojka and Budimir, Milica and Stoiljković, Milovan",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/376",
abstract = "This study explores different mechanisms of antimicrobial action by designing hybrid nanomaterials that provide a new approach in the fight against resistant microbes. Here, we present a cheap copper-polyaniline (Cu-PANI) nanocomposite material with enhanced antimicrobial properties, prepared by simple in situ polymerization method, when polymer and metal nanoparticles are produced simultaneously. The copper nanoparticles (CuNPs) are uniformly dispersed in the polymer and have a narrow size distribution (dav = 6 nm). We found that CuNPs and PANI act synergistically against three strains, Escherichia coli, Staphylococcus aureus, and Candida albicans, and resulting nanocomposite exhibits higher antimicrobial activity than any component acting alone. Before using the colony counting method to quantify its time and concentration antimicrobial activity, different techniques (UV-visible spectroscopy, transmission electron microscopy, scanning electron microscope, field emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectrophotometry, and inductively coupled plasma optical emission spectrometry) were used to identify the optical, structural, and chemical aspects of the formed Cu-PANI nanocomposite. The antimicrobial activity of this nanocomposite shows that the microbial growth has been fully inhibited; moreover, some of the tested microbes were killed. Atomic force microscopy revealed dramatic changes in morphology of tested cells due to disruption of their cell wall integrity after incubation with Cu-PANI nanocomposite.",
journal = "ACS Applied Materials and Interfaces",
title = "Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite",
volume = "7",
number = "3",
pages = "1955-1966",
doi = "10.1021/am507746m"
}
Bogdanović, U., Vodnik, V., Mitrić, M., Dimitrijević, S. I., Škapin, S. D., Zunic, V., Budimir, M.,& Stoiljković, M. (2015). Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite.
ACS Applied Materials and Interfaces, 7(3), 1955-1966.
https://doi.org/10.1021/am507746m
Bogdanović U, Vodnik V, Mitrić M, Dimitrijević SI, Škapin SD, Zunic V, Budimir M, Stoiljković M. Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite. ACS Applied Materials and Interfaces. 2015;7(3):1955-1966
Bogdanović Una, Vodnik Vesna, Mitrić Miodrag, Dimitrijević Suzana I., Škapin Srečo Davor, Zunic Vojka, Budimir Milica, Stoiljković Milovan, "Nanomaterial with High Antimicrobial Efficacy-Copper/Polyaniline Nanocomposite" ACS Applied Materials and Interfaces, 7, no. 3 (2015):1955-1966,
https://doi.org/10.1021/am507746m .
1
91
68
79

Structural investigation of CaCu3B4O12 (B = Ti, Ru)

Veselinović, Ljiljana M.; Marković, Smilja; Lukić, Miodrag; Mančić, Lidija; Škapin, Srečo Davor; Mitrić, Miodrag; Uskoković, Dragan

(Belgrade : Materials Research Society of Serbia, 2014)

TY  - CONF
AU  - Veselinović, Ljiljana M.
AU  - Marković, Smilja
AU  - Lukić, Miodrag
AU  - Mančić, Lidija
AU  - Škapin, Srečo Davor
AU  - Mitrić, Miodrag
AU  - Uskoković, Dragan
PY  - 2014
UR  - http://dais.sanu.ac.rs/123456789/562
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/830
UR  - http://www.itn.sanu.ac.rs/opus4/files/830/Veselinovic_YUCOMAT2014.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7478
AB  - Perovskite-related materials with the general formula AC3B4O12 have great technological significance due to their specific physical properties. The crystal structure of AC3B4O12 compounds is cubic with Im3 symmetry. Different cations can occupy A and B sites, while the C site is commonly occupied by Cu2+ or Mn3+ ions. It has been found that the nature of B cation changes the physical properties of the material. In our previous studies we dealt with CaCu3Ti4O12 (CCTO) and CaCu3Ru4O12 (CCRO) compounds. CCTO has the gigantic permittivity of 104105 in the kilohertz region and good stability over the temperature range from -170 to 330 °C. While Ti-compound is semiconductor, the Ru one is conductive oxide and could be used as interfaces between CCTO and metallic electrodes. Thus, CCTO and CCRO have potential application for preparation of layer capacitors with CCRO as the electrode and CCTO as the dielectric material. Since the oxygen vacancies and/or intrinsic defects in perovskites have a crucial role in the physical properties it is important to determine crystal structure of ceramic materials. In this work, a detailed structural investigation of CCTO and CCRO perovskites was performed. The powders were prepared by precipitation and successive calcination at 1100 °C with 3 h dwell time to obtained single phased materials. The phase composition and crystal structure of synthesized powders were studied by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected-area electron diffraction (SAED) and Raman spectroscopy analyses. Rietveld refinement of XRD data was used to calculate the powders stoichiometry. Furthermore, since the XRD method is not adequate for determination of oxygen atoms due to their small scattering factors, to confirm the (oxygen-) stoichiometry of the ceramic powders, thermogravimetric (TG) measurements were employed. Two sets of experiments were performed; powders were heated in a flowing: (1) air atmosphere, and (2) reducing atmosphere (mixture of 5% H2 with Ar; 20 ml/min), to 1100 °C with a heating rate 10 °C/min with 3 h dwell time. TG measurements were performed on system coupled to a quadrupole mass spectrometer used for determination of volatile compounds. The weight losses measured by TG, in two different atmospheres, were compared; minor deviations in stoichiometries of CaCu3B4O12 compounds determined by Rietveld refinement were corrected.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
T1  - Structural investigation of CaCu3B4O12 (B = Ti, Ru)
SP  - 67
EP  - 67
ER  - 
@conference{
author = "Veselinović, Ljiljana M. and Marković, Smilja and Lukić, Miodrag and Mančić, Lidija and Škapin, Srečo Davor and Mitrić, Miodrag and Uskoković, Dragan",
year = "2014",
url = "http://dais.sanu.ac.rs/123456789/562, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/830, http://www.itn.sanu.ac.rs/opus4/files/830/Veselinovic_YUCOMAT2014.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7478",
abstract = "Perovskite-related materials with the general formula AC3B4O12 have great technological significance due to their specific physical properties. The crystal structure of AC3B4O12 compounds is cubic with Im3 symmetry. Different cations can occupy A and B sites, while the C site is commonly occupied by Cu2+ or Mn3+ ions. It has been found that the nature of B cation changes the physical properties of the material. In our previous studies we dealt with CaCu3Ti4O12 (CCTO) and CaCu3Ru4O12 (CCRO) compounds. CCTO has the gigantic permittivity of 104105 in the kilohertz region and good stability over the temperature range from -170 to 330 °C. While Ti-compound is semiconductor, the Ru one is conductive oxide and could be used as interfaces between CCTO and metallic electrodes. Thus, CCTO and CCRO have potential application for preparation of layer capacitors with CCRO as the electrode and CCTO as the dielectric material. Since the oxygen vacancies and/or intrinsic defects in perovskites have a crucial role in the physical properties it is important to determine crystal structure of ceramic materials. In this work, a detailed structural investigation of CCTO and CCRO perovskites was performed. The powders were prepared by precipitation and successive calcination at 1100 °C with 3 h dwell time to obtained single phased materials. The phase composition and crystal structure of synthesized powders were studied by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), high-resolution TEM (HRTEM), selected-area electron diffraction (SAED) and Raman spectroscopy analyses. Rietveld refinement of XRD data was used to calculate the powders stoichiometry. Furthermore, since the XRD method is not adequate for determination of oxygen atoms due to their small scattering factors, to confirm the (oxygen-) stoichiometry of the ceramic powders, thermogravimetric (TG) measurements were employed. Two sets of experiments were performed; powders were heated in a flowing: (1) air atmosphere, and (2) reducing atmosphere (mixture of 5% H2 with Ar; 20 ml/min), to 1100 °C with a heating rate 10 °C/min with 3 h dwell time. TG measurements were performed on system coupled to a quadrupole mass spectrometer used for determination of volatile compounds. The weight losses measured by TG, in two different atmospheres, were compared; minor deviations in stoichiometries of CaCu3B4O12 compounds determined by Rietveld refinement were corrected.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts",
title = "Structural investigation of CaCu3B4O12 (B = Ti, Ru)",
pages = "67-67"
}
Veselinović, L. M., Marković, S., Lukić, M., Mančić, L., Škapin, S. D., Mitrić, M.,& Uskoković, D. (2014). Structural investigation of CaCu3B4O12 (B = Ti, Ru).
The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 67-67.
Veselinović LM, Marković S, Lukić M, Mančić L, Škapin SD, Mitrić M, Uskoković D. Structural investigation of CaCu3B4O12 (B = Ti, Ru). The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts. 2014;:67-67
Veselinović Ljiljana M., Marković Smilja, Lukić Miodrag, Mančić Lidija, Škapin Srečo Davor, Mitrić Miodrag, Uskoković Dragan, "Structural investigation of CaCu3B4O12 (B = Ti, Ru)" The Sixteenth Annual Conference YUCOMAT 2014: Programme and the Book of Abstracts (2014):67-67

Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application

Filipović, Nenad; Stevanović, Magdalena; Škapin, Srečo Davor; Bračko, Ines; Uskoković, Dragan

(Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade, 2012)

TY  - CONF
AU  - Filipović, Nenad
AU  - Stevanović, Magdalena
AU  - Škapin, Srečo Davor
AU  - Bračko, Ines
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/502
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/767
UR  - http://www.itn.sanu.ac.rs/opus4/files/767/Filipovic_11KMI.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7458
AB  - It is well known that selenium is an essential trace element playing the important roles in mammalian biology. For years, its organic forms and some salts have been used in studying its biological effects, but recently, selenium nanoparticles have gained great attention as a possible material for cancer therapy and prevention. In this study we report the facile and reproducible method for synthesis the nanoselenium by reduction of sodium selenite with an ascorbic acid, in the presence of a two stabilizing agents, bovine serum albumin (BSA) or poly (L-glutamic acid) (PGA). The influence of the sodium selenite/ascorbic acid ratio as well as the types and concentration of two different stabilizers on the wide variety physicochemical characteristics of obtained particles were examined.
PB  - Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
T1  - Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application
SP  - 105
EP  - 105
ER  - 
@conference{
author = "Filipović, Nenad and Stevanović, Magdalena and Škapin, Srečo Davor and Bračko, Ines and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/502, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/767, http://www.itn.sanu.ac.rs/opus4/files/767/Filipovic_11KMI.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7458",
abstract = "It is well known that selenium is an essential trace element playing the important roles in mammalian biology. For years, its organic forms and some salts have been used in studying its biological effects, but recently, selenium nanoparticles have gained great attention as a possible material for cancer therapy and prevention. In this study we report the facile and reproducible method for synthesis the nanoselenium by reduction of sodium selenite with an ascorbic acid, in the presence of a two stabilizing agents, bovine serum albumin (BSA) or poly (L-glutamic acid) (PGA). The influence of the sodium selenite/ascorbic acid ratio as well as the types and concentration of two different stabilizers on the wide variety physicochemical characteristics of obtained particles were examined.",
publisher = "Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts",
title = "Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application",
pages = "105-105"
}
Filipović, N., Stevanović, M., Škapin, S. D., Bračko, I.,& Uskoković, D. (2012). Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application.
Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade., 105-105.
Filipović N, Stevanović M, Škapin SD, Bračko I, Uskoković D. Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application. Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts. 2012;:105-105
Filipović Nenad, Stevanović Magdalena, Škapin Srečo Davor, Bračko Ines, Uskoković Dragan, "Synthesis and characterization of selenium nanoparticles in the presence of bovine serum albumin or poly (L-glutamic acid) for biomedical application" Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts (2012):105-105

A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles

Stevanovic, Magdalena; Savanovic, Igor; Uskokovic, Vuk; Škapin, Srečo Davor; Bracko, Ines; Jovanović, Uroš D.; Uskoković, Dragan

(2012)

TY  - JOUR
AU  - Stevanovic, Magdalena
AU  - Savanovic, Igor
AU  - Uskokovic, Vuk
AU  - Škapin, Srečo Davor
AU  - Bracko, Ines
AU  - Jovanović, Uroš D.
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4659
AB  - A simple and green chemical method has been developed to synthesize stable bare and capped silver nanoparticles based on the reduction of silver ions by glucose and capping by poly(alpha,gamma,l-glutamic acid) (PGA). The use of ammonia during synthesis was avoided. PGA has had a dual role in the synthesis and was used as a capping agent to make the silver nanoparticle more biocompatible and to protect the nanoparticles from agglomerating in the liquid medium. The synthesized PGA-capped silver nanoparticles in the size range 5-45 nm were stable over long periods of time, without signs of precipitation. Morphological examination has shown that the silver nanoparticles had a nearly spherical, multiply twinned structure. The effects of the reaction temperature and the reaction time during the synthesis were investigated too. The biocompatibility of the PGA-capped silver nanoparticles is discussed in terms of in vitro toxicity with human intestinal Caco-2 cells. The samples were characterized by UV-Visible spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and zeta potential measurements.
T2  - Colloid and Polymer Science
T1  - A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles
VL  - 290
IS  - 3
SP  - 221
EP  - 231
DO  - 10.1007/s00396-011-2540-7
ER  - 
@article{
author = "Stevanovic, Magdalena and Savanovic, Igor and Uskokovic, Vuk and Škapin, Srečo Davor and Bracko, Ines and Jovanović, Uroš D. and Uskoković, Dragan",
year = "2012",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4659",
abstract = "A simple and green chemical method has been developed to synthesize stable bare and capped silver nanoparticles based on the reduction of silver ions by glucose and capping by poly(alpha,gamma,l-glutamic acid) (PGA). The use of ammonia during synthesis was avoided. PGA has had a dual role in the synthesis and was used as a capping agent to make the silver nanoparticle more biocompatible and to protect the nanoparticles from agglomerating in the liquid medium. The synthesized PGA-capped silver nanoparticles in the size range 5-45 nm were stable over long periods of time, without signs of precipitation. Morphological examination has shown that the silver nanoparticles had a nearly spherical, multiply twinned structure. The effects of the reaction temperature and the reaction time during the synthesis were investigated too. The biocompatibility of the PGA-capped silver nanoparticles is discussed in terms of in vitro toxicity with human intestinal Caco-2 cells. The samples were characterized by UV-Visible spectroscopy, field emission scanning electron microscopy, transmission electron microscopy, and zeta potential measurements.",
journal = "Colloid and Polymer Science",
title = "A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles",
volume = "290",
number = "3",
pages = "221-231",
doi = "10.1007/s00396-011-2540-7"
}
Stevanovic, M., Savanovic, I., Uskokovic, V., Škapin, S. D., Bracko, I., Jovanović, U. D.,& Uskoković, D. (2012). A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles.
Colloid and Polymer Science, 290(3), 221-231.
https://doi.org/10.1007/s00396-011-2540-7
Stevanovic M, Savanovic I, Uskokovic V, Škapin SD, Bracko I, Jovanović UD, Uskoković D. A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles. Colloid and Polymer Science. 2012;290(3):221-231
Stevanovic Magdalena, Savanovic Igor, Uskokovic Vuk, Škapin Srečo Davor, Bracko Ines, Jovanović Uroš D., Uskoković Dragan, "A new, simple, green, and one-pot four-component synthesis of bare and poly(alpha,gamma,l-glutamic acid)-capped silver nanoparticles" Colloid and Polymer Science, 290, no. 3 (2012):221-231,
https://doi.org/10.1007/s00396-011-2540-7 .
28
27
30

Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders

Lukić, Miodrag; Veselinović, Ljiljana M.; Stojanović, Zoran S.; Maček Kržmanc, Marjeta; Bračko, Ines; Škapin, Srečo Davor; Marković, Smilja; Uskoković, Dragan

(Elsevier, 2012)

TY  - JOUR
AU  - Lukić, Miodrag
AU  - Veselinović, Ljiljana M.
AU  - Stojanović, Zoran S.
AU  - Maček Kržmanc, Marjeta
AU  - Bračko, Ines
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/476
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/740
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7447
AB  - We report unusual sintering behavior of Ca-deficient hydroxyapatite processed with different heating rates; particularly, faster heating resulted in higher densification. We hypothesize that faster heating delays formation of β-tricalcium phosphate which yields to unobstructed densification in intermediate sintering stage, allowing further tailoring of both microstructure and phase composition (hydroxyapatite/tricalcium phosphate).
PB  - Elsevier
T2  - Materials Letters
T1  - Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders
SP  - 331
EP  - 335
DO  - 10.1016/j.matlet.2011.10.085
ER  - 
@article{
author = "Lukić, Miodrag and Veselinović, Ljiljana M. and Stojanović, Zoran S. and Maček Kržmanc, Marjeta and Bračko, Ines and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/476, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/740, http://vinar.vin.bg.ac.rs/handle/123456789/7447",
abstract = "We report unusual sintering behavior of Ca-deficient hydroxyapatite processed with different heating rates; particularly, faster heating resulted in higher densification. We hypothesize that faster heating delays formation of β-tricalcium phosphate which yields to unobstructed densification in intermediate sintering stage, allowing further tailoring of both microstructure and phase composition (hydroxyapatite/tricalcium phosphate).",
publisher = "Elsevier",
journal = "Materials Letters",
title = "Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders",
pages = "331-335",
doi = "10.1016/j.matlet.2011.10.085"
}
Lukić, M., Veselinović, L. M., Stojanović, Z. S., Maček Kržmanc, M., Bračko, I., Škapin, S. D., Marković, S.,& Uskoković, D. (2012). Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders.
Materials Letters
Elsevier., 331-335.
https://doi.org/10.1016/j.matlet.2011.10.085
Lukić M, Veselinović LM, Stojanović ZS, Maček Kržmanc M, Bračko I, Škapin SD, Marković S, Uskoković D. Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders. Materials Letters. 2012;:331-335
Lukić Miodrag, Veselinović Ljiljana M., Stojanović Zoran S., Maček Kržmanc Marjeta, Bračko Ines, Škapin Srečo Davor, Marković Smilja, Uskoković Dragan, "Peculiarities in sintering behavior of Ca-deficient hydroxyapatite nanopowders" Materials Letters (2012):331-335,
https://doi.org/10.1016/j.matlet.2011.10.085 .
11
12
11

Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite

Lukić, Miodrag; Marković, Smilja; Škapin, Srečo Davor; Uskoković, Dragan

(Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade, 2012)

TY  - CONF
AU  - Lukić, Miodrag
AU  - Marković, Smilja
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/510
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/776
UR  - http://www.itn.sanu.ac.rs/opus4/files/776/Lukic_11KMI.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7463
AB  - Doping of hydroxyapatite crystal structure with various ions is generally performed to improve biological, electrical, optical and mechanical properties of initial system. In this study, hydroxyapatite nanopowders doped with different amounts of zirconium (0, 1, 5, 10 at. %) have been sintered at different temperatures. Phase and microstructural evolution were examined by X-ray diffraction studies and field emission scanning electron microscopy.
PB  - Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade
C3  - Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
T1  - Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite
SP  - 44
EP  - 44
ER  - 
@conference{
author = "Lukić, Miodrag and Marković, Smilja and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/510, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/776, http://www.itn.sanu.ac.rs/opus4/files/776/Lukic_11KMI.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7463",
abstract = "Doping of hydroxyapatite crystal structure with various ions is generally performed to improve biological, electrical, optical and mechanical properties of initial system. In this study, hydroxyapatite nanopowders doped with different amounts of zirconium (0, 1, 5, 10 at. %) have been sintered at different temperatures. Phase and microstructural evolution were examined by X-ray diffraction studies and field emission scanning electron microscopy.",
publisher = "Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade",
journal = "Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts",
title = "Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite",
pages = "44-44"
}
Lukić, M., Marković, S., Škapin, S. D.,& Uskoković, D. (2012). Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite.
Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
Belgrade : Materials Research Society of Serbia; Institute of Technical Sciences of SASA; Vinča Institute of Nuclear Sciences, University of Belgrade., 44-44.
Lukić M, Marković S, Škapin SD, Uskoković D. Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite. Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts. 2012;:44-44
Lukić Miodrag, Marković Smilja, Škapin Srečo Davor, Uskoković Dragan, "Phase and microstructural evolution during sintering of Zr-doped hydroxyapatite" Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts (2012):44-44

Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response

Vukomanović, Marija; Šarčev, Igor; Petronijević, B.; Škapin, Srečo Davor; Ignjatović, Nenad L.; Uskoković, Dragan

(Elsevier, 2012)

TY  - JOUR
AU  - Vukomanović, Marija
AU  - Šarčev, Igor
AU  - Petronijević, B.
AU  - Škapin, Srečo Davor
AU  - Ignjatović, Nenad L.
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/490
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/755
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7452
AB  - The surface properties of PLGA/HAp core–shell nanoparticles loaded with clindamycin obtained by an ultrasonic processing method and their changes under the simulated physiological conditions during the degradation process (when the morphology is changed starting from the nanospheres, over micrometer-sized plate-like films to a porous network) were investigated. The dynamic change of the surface properties of this material obtained in a water environment showed an increase of the surface area (up to 70 m2/g) and an improved wettability (estimated water contact angle was in the range between 40° and 60°) suggesting the possibility for its good interaction with cells. The in vitro tests are in a good correlation with this hypothesis, showing a high level of cytocompatibility of the material with the mouse L929 and human lung MRC-5 fibroblasts. The fibroblasts were able to achieve the contact with the material's surface and to attach onto it. The significance of HAp, as the bioceramic phase within the PLGA/HAp core–shell nanoparticles, may be brought into relationship with its role in improving the surface properties of PLGA/HAp obtained during the degradation process. These properties are closely related to the bioactivity and biocompatibility of this material, which are highly relevant for its biomedical application.
PB  - Elsevier
T2  - Colloids and Surfaces B: Biointerfaces
T1  - Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response
SP  - 144
EP  - 153
DO  - 10.1016/j.colsurfb.2011.10.049
ER  - 
@article{
author = "Vukomanović, Marija and Šarčev, Igor and Petronijević, B. and Škapin, Srečo Davor and Ignjatović, Nenad L. and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/490, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/755, http://vinar.vin.bg.ac.rs/handle/123456789/7452",
abstract = "The surface properties of PLGA/HAp core–shell nanoparticles loaded with clindamycin obtained by an ultrasonic processing method and their changes under the simulated physiological conditions during the degradation process (when the morphology is changed starting from the nanospheres, over micrometer-sized plate-like films to a porous network) were investigated. The dynamic change of the surface properties of this material obtained in a water environment showed an increase of the surface area (up to 70 m2/g) and an improved wettability (estimated water contact angle was in the range between 40° and 60°) suggesting the possibility for its good interaction with cells. The in vitro tests are in a good correlation with this hypothesis, showing a high level of cytocompatibility of the material with the mouse L929 and human lung MRC-5 fibroblasts. The fibroblasts were able to achieve the contact with the material's surface and to attach onto it. The significance of HAp, as the bioceramic phase within the PLGA/HAp core–shell nanoparticles, may be brought into relationship with its role in improving the surface properties of PLGA/HAp obtained during the degradation process. These properties are closely related to the bioactivity and biocompatibility of this material, which are highly relevant for its biomedical application.",
publisher = "Elsevier",
journal = "Colloids and Surfaces B: Biointerfaces",
title = "Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response",
pages = "144-153",
doi = "10.1016/j.colsurfb.2011.10.049"
}
Vukomanović, M., Šarčev, I., Petronijević, B., Škapin, S. D., Ignjatović, N. L.,& Uskoković, D. (2012). Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response.
Colloids and Surfaces B: Biointerfaces
Elsevier., 144-153.
https://doi.org/10.1016/j.colsurfb.2011.10.049
Vukomanović M, Šarčev I, Petronijević B, Škapin SD, Ignjatović NL, Uskoković D. Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response. Colloids and Surfaces B: Biointerfaces. 2012;:144-153
Vukomanović Marija, Šarčev Igor, Petronijević B., Škapin Srečo Davor, Ignjatović Nenad L., Uskoković Dragan, "Poly(d,l-lactide-co-glycolide)/hydroxyapatite core–shell nanospheres. Part 4: A change of the surface properties during degradation process and the corresponding in vitro cellular response" Colloids and Surfaces B: Biointerfaces (2012):144-153,
https://doi.org/10.1016/j.colsurfb.2011.10.049 .
9
11
12

Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics

Stanković, Ana; Stojanović, Zoran S.; Veselinović, Ljiljana M.; Bračko, Ines; Škapin, Srečo Davor; Marković, Smilja; Uskoković, Dragan

(Belgrade : Materials Research Society of Serbia, 2012)

TY  - CONF
AU  - Stanković, Ana
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana M.
AU  - Bračko, Ines
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/697
UR  - http://dais.sanu.ac.rs/123456789/435
UR  - http://www.itn.sanu.ac.rs/opus4/files/697/Stankovic-Yucomat2012-47.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7437
AB  - ZnO represent one of the most important multifunctional materials. Its properties are well known and confirmed in different application areas such as: gas sensors, UV lasers, solar cells, electroluminescent and optoelectronic devices, piezoelectric transducers, hydrogen-storages, rubber industry and plastic processing, cosmetics and pharmacy, and it is also used as an antibacterial agent. In this work, we propose a low-temperature hydrothermal method for the synthesis of phase-pure ZnO powders with a controlled morphology and narrow particle size distribution. This simple and low-cost method allows tailoring of the shape and size of ZnO particles, from micro-rods via hexagonal prism-like to nano-spheres, by choosing the appropriate pH of the reaction solution, tuned by the varying of [Na+]:[Zn2+] molar ratio. The agglomeration of the powders was prevented with the assistance of PVP as a capping agent. The synthesized powders were characterized by XRD, TEM, SEAD and HRTEM methods to examine the phase purity and crystallinity. FE-SEM measurements were used for the morphology characterization, while the results of Raman and UV-Vis DRS measurements were used for the study of optical properties. The relationship between the particle size and morphology and the optical properties is discussed. Diffuse reflectance spectra of ZnO powders with different size and morphology revealed characteristic R curves with the absorption edge near 380 nm, but with obvious difference in the absorption in the visible region. The micro-sized powder ZnO8 revealed the lowest reflectance (∼70%), compared to submicro- (∼80%) and nano-sized (ZnO12 and ZnO13, ∼90%) powders. Thus, the reflectance of the ZnO powders decreases with the increase in the average particle size.
PB  - Belgrade : Materials Research Society of Serbia
C3  - The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
T1  - Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics
SP  - 47
EP  - 47
ER  - 
@conference{
author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana M. and Bračko, Ines and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
url = "http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/697, http://dais.sanu.ac.rs/123456789/435, http://www.itn.sanu.ac.rs/opus4/files/697/Stankovic-Yucomat2012-47.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7437",
abstract = "ZnO represent one of the most important multifunctional materials. Its properties are well known and confirmed in different application areas such as: gas sensors, UV lasers, solar cells, electroluminescent and optoelectronic devices, piezoelectric transducers, hydrogen-storages, rubber industry and plastic processing, cosmetics and pharmacy, and it is also used as an antibacterial agent. In this work, we propose a low-temperature hydrothermal method for the synthesis of phase-pure ZnO powders with a controlled morphology and narrow particle size distribution. This simple and low-cost method allows tailoring of the shape and size of ZnO particles, from micro-rods via hexagonal prism-like to nano-spheres, by choosing the appropriate pH of the reaction solution, tuned by the varying of [Na+]:[Zn2+] molar ratio. The agglomeration of the powders was prevented with the assistance of PVP as a capping agent. The synthesized powders were characterized by XRD, TEM, SEAD and HRTEM methods to examine the phase purity and crystallinity. FE-SEM measurements were used for the morphology characterization, while the results of Raman and UV-Vis DRS measurements were used for the study of optical properties. The relationship between the particle size and morphology and the optical properties is discussed. Diffuse reflectance spectra of ZnO powders with different size and morphology revealed characteristic R curves with the absorption edge near 380 nm, but with obvious difference in the absorption in the visible region. The micro-sized powder ZnO8 revealed the lowest reflectance (∼70%), compared to submicro- (∼80%) and nano-sized (ZnO12 and ZnO13, ∼90%) powders. Thus, the reflectance of the ZnO powders decreases with the increase in the average particle size.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts",
title = "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics",
pages = "47-47"
}
Stanković, A., Stojanović, Z. S., Veselinović, L. M., Bračko, I., Škapin, S. D., Marković, S.,& Uskoković, D. (2012). Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics.
The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts
Belgrade : Materials Research Society of Serbia., 47-47.
Stanković A, Stojanović ZS, Veselinović LM, Bračko I, Škapin SD, Marković S, Uskoković D. Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics. The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts. 2012;:47-47
Stanković Ana, Stojanović Zoran S., Veselinović Ljiljana M., Bračko Ines, Škapin Srečo Davor, Marković Smilja, Uskoković Dragan, "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics" The Fourteenth Annual Conference YUCOMAT 2012: Programme and the Book of Abstracts (2012):47-47

ZnO micro and nanocrystals with enhanced visible light absorption

Stanković, Ana; Stojanović, Zoran S.; Veselinović, Ljiljana M.; Škapin, Srečo Davor; Bračko, Ines; Marković, Smilja; Uskoković, Dragan

(Elsevier, 2012)

TY  - JOUR
AU  - Stanković, Ana
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana M.
AU  - Škapin, Srečo Davor
AU  - Bračko, Ines
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/486
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/751
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7450
AB  - In this paper, we investigate the effect of the particle size and morphology on the optical properties of ZnO. A series of ZnO micro and nanocrystals were synthesized by the hydrothermal processing of zinc acetate dihydrate and sodium hydroxide as the starting materials, and polyvinylpyrrolidone (PVP) as the polymer surfactant. The particle size and morphology were tailored by adjusting the reactant molar ratios [Zn2+]/[OH−], while the reaction temperature and the time remained unchanged. X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and high-resolution TEM (HRTEM) have shown that the micro and nanocrystals have a high crystalline pure wurtzite-type hexagonal structure with nanosized crystallites. The size and morphology of the ZnO micro and nanocrystals were investigated by field emission scanning electron microscopy (FE-SEM), which showed a modification from micro-rods via hexagonal-faceted prismatic morphology to nanospheres, caused by simple adjustment of the reactant molar ratio [Zn2+]/[OH−] from 1:1 to 1:5. The optical properties of the ZnO micro and nanocrystals, as well as their dependence on the particle size and morphology were investigated by Raman and ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy (DRS). The UV–vis spectra showed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased absorption, and a slight red-shift of the absorption edge (0.06 eV). Besides, the band gap energy of the synthesized ZnO micro and nanocrystals showed the red shift (∼0.20 eV) compared to bulk ZnO. According to the results of a Raman spectroscopy, the enhanced visible light absorption of the ZnO micro and nanocrystals is related to two phenomena: (1) the existence of lattice defects (oxygen vacancies and zinc interstitials), and (2) the particle surface sensitization by PVP.
PB  - Elsevier
T2  - Materials Science and Engineering: B
T1  - ZnO micro and nanocrystals with enhanced visible light absorption
SP  - 1038
EP  - 1045
DO  - 10.1016/j.mseb.2012.05.013
ER  - 
@article{
author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana M. and Škapin, Srečo Davor and Bračko, Ines and Marković, Smilja and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/486, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/751, http://vinar.vin.bg.ac.rs/handle/123456789/7450",
abstract = "In this paper, we investigate the effect of the particle size and morphology on the optical properties of ZnO. A series of ZnO micro and nanocrystals were synthesized by the hydrothermal processing of zinc acetate dihydrate and sodium hydroxide as the starting materials, and polyvinylpyrrolidone (PVP) as the polymer surfactant. The particle size and morphology were tailored by adjusting the reactant molar ratios [Zn2+]/[OH−], while the reaction temperature and the time remained unchanged. X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and high-resolution TEM (HRTEM) have shown that the micro and nanocrystals have a high crystalline pure wurtzite-type hexagonal structure with nanosized crystallites. The size and morphology of the ZnO micro and nanocrystals were investigated by field emission scanning electron microscopy (FE-SEM), which showed a modification from micro-rods via hexagonal-faceted prismatic morphology to nanospheres, caused by simple adjustment of the reactant molar ratio [Zn2+]/[OH−] from 1:1 to 1:5. The optical properties of the ZnO micro and nanocrystals, as well as their dependence on the particle size and morphology were investigated by Raman and ultraviolet–visible (UV–vis) diffuse reflectance spectroscopy (DRS). The UV–vis spectra showed that the modification of the particle size and morphology from nanospheres to micro-rods resulted in increased absorption, and a slight red-shift of the absorption edge (0.06 eV). Besides, the band gap energy of the synthesized ZnO micro and nanocrystals showed the red shift (∼0.20 eV) compared to bulk ZnO. According to the results of a Raman spectroscopy, the enhanced visible light absorption of the ZnO micro and nanocrystals is related to two phenomena: (1) the existence of lattice defects (oxygen vacancies and zinc interstitials), and (2) the particle surface sensitization by PVP.",
publisher = "Elsevier",
journal = "Materials Science and Engineering: B",
title = "ZnO micro and nanocrystals with enhanced visible light absorption",
pages = "1038-1045",
doi = "10.1016/j.mseb.2012.05.013"
}
Stanković, A., Stojanović, Z. S., Veselinović, L. M., Škapin, S. D., Bračko, I., Marković, S.,& Uskoković, D. (2012). ZnO micro and nanocrystals with enhanced visible light absorption.
Materials Science and Engineering: B
Elsevier., 1038-1045.
https://doi.org/10.1016/j.mseb.2012.05.013
Stanković A, Stojanović ZS, Veselinović LM, Škapin SD, Bračko I, Marković S, Uskoković D. ZnO micro and nanocrystals with enhanced visible light absorption. Materials Science and Engineering: B. 2012;:1038-1045
Stanković Ana, Stojanović Zoran S., Veselinović Ljiljana M., Škapin Srečo Davor, Bračko Ines, Marković Smilja, Uskoković Dragan, "ZnO micro and nanocrystals with enhanced visible light absorption" Materials Science and Engineering: B (2012):1038-1045,
https://doi.org/10.1016/j.mseb.2012.05.013 .
22
21
20

Influence of particle size and morphology of ZnO powders on their optical properties

Stanković, Ana; Stojanović, Zoran S.; Veselinović, Ljiljana M.; Abazović, Nadica; Škapin, Srečo Davor; Marković, Smilja; Uskoković, Dragan

(Belgrade : Serbian Ceramic Society, 2012)

TY  - CONF
AU  - Stanković, Ana
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana M.
AU  - Abazović, Nadica
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/529
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/796
UR  - http://www.itn.sanu.ac.rs/opus4/files/796/Stankovic_11KMI.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7471
AB  - In this work we present details of different synthesis procedures for preparation of ZnO powders and a possibility to create various particles morphology and average size; from micrometer rods to nanometer spherical particles. We studied two synthesis methods, low temperature hydrothermal processing (HT) and ultrasound processing (US). The morphology and average particle size of the ZnO particles were modified by adjusting the mole ratio of [Zn2+]/[OH] in the reactants solution. Agglomeration of the particles was prevented using a polyvinyl pyrrolidone (PVP) as a capping agent. The synthesized powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (FESEM) and UV-Vis - diffusion reflection spectroscopy (UV-Vis DRS). Based on the results of the scanning electron microscopy we proposed a possible growth mechanism of the ZnO particles depending on the mole ratio of [Zn2+]/[OH]. Also, we considered the influence of particle size and morphology on the optical properties of the prepared powders. The observed results sowed that the size and morphology of ZnO particles greatly affect the absorption of visible light (%) and the shift of the energy gap (eV).
PB  - Belgrade : Serbian Ceramic Society
C3  - Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
T1  - Influence of particle size and morphology of ZnO powders on their optical properties
SP  - 60
EP  - 60
ER  - 
@conference{
author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana M. and Abazović, Nadica and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/529, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/796, http://www.itn.sanu.ac.rs/opus4/files/796/Stankovic_11KMI.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7471",
abstract = "In this work we present details of different synthesis procedures for preparation of ZnO powders and a possibility to create various particles morphology and average size; from micrometer rods to nanometer spherical particles. We studied two synthesis methods, low temperature hydrothermal processing (HT) and ultrasound processing (US). The morphology and average particle size of the ZnO particles were modified by adjusting the mole ratio of [Zn2+]/[OH] in the reactants solution. Agglomeration of the particles was prevented using a polyvinyl pyrrolidone (PVP) as a capping agent. The synthesized powders were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (FESEM) and UV-Vis - diffusion reflection spectroscopy (UV-Vis DRS). Based on the results of the scanning electron microscopy we proposed a possible growth mechanism of the ZnO particles depending on the mole ratio of [Zn2+]/[OH]. Also, we considered the influence of particle size and morphology on the optical properties of the prepared powders. The observed results sowed that the size and morphology of ZnO particles greatly affect the absorption of visible light (%) and the shift of the energy gap (eV).",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts",
title = "Influence of particle size and morphology of ZnO powders on their optical properties",
pages = "60-60"
}
Stanković, A., Stojanović, Z. S., Veselinović, L. M., Abazović, N., Škapin, S. D., Marković, S.,& Uskoković, D. (2012). Influence of particle size and morphology of ZnO powders on their optical properties.
Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts
Belgrade : Serbian Ceramic Society., 60-60.
Stanković A, Stojanović ZS, Veselinović LM, Abazović N, Škapin SD, Marković S, Uskoković D. Influence of particle size and morphology of ZnO powders on their optical properties. Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts. 2012;:60-60
Stanković Ana, Stojanović Zoran S., Veselinović Ljiljana M., Abazović Nadica, Škapin Srečo Davor, Marković Smilja, Uskoković Dragan, "Influence of particle size and morphology of ZnO powders on their optical properties" Joint Event of the 11th Young Researchers’ Conference: Materials Science and Engineering and the 1st European Early Stage Researches’ Conference on Hydrogen Storage: Program and the Book of Abstracts (2012):60-60

Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics

Stanković, Ana; Stojanović, Zoran S.; Veselinović, Ljiljana M.; Bračko, Ines; Škapin, Srečo Davor; Marković, Smilja; Uskoković, Dragan

(2012)

TY  - CONF
AU  - Stanković, Ana
AU  - Stojanović, Zoran S.
AU  - Veselinović, Ljiljana M.
AU  - Bračko, Ines
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/145
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/380
UR  - http://www.itn.sanu.ac.rs/opus4/files/380/Stankovic_Yucomat2012.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7351
AB  - Poster presented at the 14th Annual Conference of the Materials Research Society of Serbia - YUCOMAT 2012, Herceg Novi, Montenegro, September 3–7, 2012
T1  - Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics
ER  - 
@conference{
author = "Stanković, Ana and Stojanović, Zoran S. and Veselinović, Ljiljana M. and Bračko, Ines and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2012",
url = "http://dais.sanu.ac.rs/123456789/145, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/380, http://www.itn.sanu.ac.rs/opus4/files/380/Stankovic_Yucomat2012.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7351",
abstract = "Poster presented at the 14th Annual Conference of the Materials Research Society of Serbia - YUCOMAT 2012, Herceg Novi, Montenegro, September 3–7, 2012",
title = "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics"
}
Stanković, A., Stojanović, Z. S., Veselinović, L. M., Bračko, I., Škapin, S. D., Marković, S.,& Uskoković, D. (2012). Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics.
.
Stanković A, Stojanović ZS, Veselinović LM, Bračko I, Škapin SD, Marković S, Uskoković D. Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics. 2012;
Stanković Ana, Stojanović Zoran S., Veselinović Ljiljana M., Bračko Ines, Škapin Srečo Davor, Marković Smilja, Uskoković Dragan, "Hydrothermal synthesis of ZnO powders with a tailored particle morphology and improved optical characteristics" (2012)

Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis

Jugović, Dragana; Mitrić, Miodrag; Kuzmanović, Maja D.; Cvjeticanin, N.; Markovic, S.; Škapin, Srečo Davor; Uskoković, Dragan

(2012)

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Kuzmanović, Maja D.
AU  - Cvjeticanin, N.
AU  - Markovic, S.
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4733
AB  - Lithium iron phosphate powders were obtained by solvothermal treatments of quaternary emulsions Triton X-100/cyclohexane/n-hexanol/water at low temperature (180 degrees C), with or without stirring. Such synthesis conditions allowed for fast crystallization of pure olivine-type LiFePO4 powder, evidenced by the X-ray powder diffraction measurements and energy dispersive spectroscopy. It has been found that stirring drastically changes the morphology of LiFePO4 particles, causing a preferential crystal orientation. Also, a great difference in the morphology was demonstrated by field emission scanning electron microscopy. The powder obtained after only half an hour of the dynamic solvothermal treatment, without additional post annealing, and without carbon coating, was electrochemically active, showing the discharge capacity of 115 mAh g(-1). (C) 2011 Elsevier B.V. All rights reserved.
T2  - Powder Technology
T1  - Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis
VL  - 219
SP  - 128
EP  - 134
DO  - 10.1016/j.powtec.2011.12.028
ER  - 
@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Kuzmanović, Maja D. and Cvjeticanin, N. and Markovic, S. and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2012",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4733",
abstract = "Lithium iron phosphate powders were obtained by solvothermal treatments of quaternary emulsions Triton X-100/cyclohexane/n-hexanol/water at low temperature (180 degrees C), with or without stirring. Such synthesis conditions allowed for fast crystallization of pure olivine-type LiFePO4 powder, evidenced by the X-ray powder diffraction measurements and energy dispersive spectroscopy. It has been found that stirring drastically changes the morphology of LiFePO4 particles, causing a preferential crystal orientation. Also, a great difference in the morphology was demonstrated by field emission scanning electron microscopy. The powder obtained after only half an hour of the dynamic solvothermal treatment, without additional post annealing, and without carbon coating, was electrochemically active, showing the discharge capacity of 115 mAh g(-1). (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Powder Technology",
title = "Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis",
volume = "219",
pages = "128-134",
doi = "10.1016/j.powtec.2011.12.028"
}
Jugović, D., Mitrić, M., Kuzmanović, M. D., Cvjeticanin, N., Markovic, S., Škapin, S. D.,& Uskoković, D. (2012). Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis.
Powder Technology, 219, 128-134.
https://doi.org/10.1016/j.powtec.2011.12.028
Jugović D, Mitrić M, Kuzmanović MD, Cvjeticanin N, Markovic S, Škapin SD, Uskoković D. Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis. Powder Technology. 2012;219:128-134
Jugović Dragana, Mitrić Miodrag, Kuzmanović Maja D., Cvjeticanin N., Markovic S., Škapin Srečo Davor, Uskoković Dragan, "Rapid crystallization of LiFePO4 particles by facile emulsion-mediated solvothermal synthesis" Powder Technology, 219 (2012):128-134,
https://doi.org/10.1016/j.powtec.2011.12.028 .
10
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Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite

Lukić, Miodrag; Škapin, Srečo Davor; Marković, Smilja; Uskoković, Dragan

(Belgrade : Institute of Technical Sciences of the Serbian Academy of Sciences and Arts, 2011)

TY  - CONF
AU  - Lukić, Miodrag
AU  - Škapin, Srečo Davor
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2011
UR  - http://dais.sanu.ac.rs/123456789/696
UR  - http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/968
UR  - http://www.itn.sanu.ac.rs/opus4/files/968/Lukic_10KMI.pdf
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7517
AB  - Improving of material characteristics could be achieved in different ways, but it is always connected with the issue of impairing the other functional properties. Hydroxyapatite bioceramics lacks of insufficient mechanical properties for load-bearing implant applications. Nowadays, making of composites, nanostructuring and doping of basic material are some of the promising pathways for hydroxyapatite toughening. Until now, Zr is not considered as fortifying dopant in hydroxyapatite based materials. However, it could be interesting in the sense of nontoxicity, preserved biocompatibility and incorporation in hydroxyapatite crystal lattice since it possesses lower crystalographic radius. In this study, preliminary experiments of chemical precipitation are performed to obtain hydroxyapatite with various Zr content. The crystal phase composition, particle size and morphology changes compared to pure hydroxyapatite are studied. Sintering is performed to find appropriate conditions for fabrication of dense material. Vickers hardness and fracture toughness were also measured.
PB  - Belgrade : Institute of Technical Sciences of the Serbian Academy of Sciences and Arts
C3  - Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia
T1  - Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite
SP  - 1
EP  - 1
ER  - 
@conference{
author = "Lukić, Miodrag and Škapin, Srečo Davor and Marković, Smilja and Uskoković, Dragan",
year = "2011",
url = "http://dais.sanu.ac.rs/123456789/696, http://www.itn.sanu.ac.rs/opus4/frontdoor/index/index/docId/968, http://www.itn.sanu.ac.rs/opus4/files/968/Lukic_10KMI.pdf, http://vinar.vin.bg.ac.rs/handle/123456789/7517",
abstract = "Improving of material characteristics could be achieved in different ways, but it is always connected with the issue of impairing the other functional properties. Hydroxyapatite bioceramics lacks of insufficient mechanical properties for load-bearing implant applications. Nowadays, making of composites, nanostructuring and doping of basic material are some of the promising pathways for hydroxyapatite toughening. Until now, Zr is not considered as fortifying dopant in hydroxyapatite based materials. However, it could be interesting in the sense of nontoxicity, preserved biocompatibility and incorporation in hydroxyapatite crystal lattice since it possesses lower crystalographic radius. In this study, preliminary experiments of chemical precipitation are performed to obtain hydroxyapatite with various Zr content. The crystal phase composition, particle size and morphology changes compared to pure hydroxyapatite are studied. Sintering is performed to find appropriate conditions for fabrication of dense material. Vickers hardness and fracture toughness were also measured.",
publisher = "Belgrade : Institute of Technical Sciences of the Serbian Academy of Sciences and Arts",
journal = "Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia",
title = "Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite",
pages = "1-1"
}
Lukić, M., Škapin, S. D., Marković, S.,& Uskoković, D. (2011). Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite.
Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of the Serbian Academy of Sciences and Arts., 1-1.
Lukić M, Škapin SD, Marković S, Uskoković D. Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite. Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia. 2011;:1-1
Lukić Miodrag, Škapin Srečo Davor, Marković Smilja, Uskoković Dragan, "Synthesis, characterization and sintering properties of Zr-doped hydroxyapatite" Program and the Book of Abstracts / Tenth Young Researchers' Conference Materials Science and Engineering, December 21-23, 2011, Belgrade, Serbia (2011):1-1

Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering

Lukic, M.; Stojanović, Zoran S.; Škapin, Srečo Davor; Macek-Krzmanc, M.; Mitrić, Miodrag; Markovic, S.; Uskoković, Dragan

(2011)

TY  - JOUR
AU  - Lukic, M.
AU  - Stojanović, Zoran S.
AU  - Škapin, Srečo Davor
AU  - Macek-Krzmanc, M.
AU  - Mitrić, Miodrag
AU  - Markovic, S.
AU  - Uskoković, Dragan
PY  - 2011
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4155
AB  - In this study, dense fine-grained biphasic calcium phosphate bioceramics were designed via the two-step sintering method The starting powder was nanosized calcium-deficient hydroxyapatite, whose phase composition, average particle size and morphology were characterized by XRD, FTIR, Raman spectroscopy, laser diffraction and FE-SEM The phase transformations of the initial powder during heating up to 1200 degrees C were examined using TG/DSC At first, conventional sintering was performed and the recorded shrinkage/densification data were used to find out the appropriate experimental conditions for two step sintering The obtained results show that two step sintering yields BCP ceramics consisting of hydroxyapatite and beta-TCP with lull dense, homogeneous structure with average grain size of 375 nm Furthermore BCP ceramics obtained by the two-step sintering method exhibit improved mechanical properties, compared to conventionally sintered BCP (C) 2010 Elsevier Ltd All rights reserved
T2  - Journal of the European Ceramic Society
T1  - Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering
VL  - 31
IS  - 1-2
SP  - 19
EP  - 27
DO  - 10.1016/j.jeurceramsoc.2010.09.006
ER  - 
@article{
author = "Lukic, M. and Stojanović, Zoran S. and Škapin, Srečo Davor and Macek-Krzmanc, M. and Mitrić, Miodrag and Markovic, S. and Uskoković, Dragan",
year = "2011",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/4155",
abstract = "In this study, dense fine-grained biphasic calcium phosphate bioceramics were designed via the two-step sintering method The starting powder was nanosized calcium-deficient hydroxyapatite, whose phase composition, average particle size and morphology were characterized by XRD, FTIR, Raman spectroscopy, laser diffraction and FE-SEM The phase transformations of the initial powder during heating up to 1200 degrees C were examined using TG/DSC At first, conventional sintering was performed and the recorded shrinkage/densification data were used to find out the appropriate experimental conditions for two step sintering The obtained results show that two step sintering yields BCP ceramics consisting of hydroxyapatite and beta-TCP with lull dense, homogeneous structure with average grain size of 375 nm Furthermore BCP ceramics obtained by the two-step sintering method exhibit improved mechanical properties, compared to conventionally sintered BCP (C) 2010 Elsevier Ltd All rights reserved",
journal = "Journal of the European Ceramic Society",
title = "Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering",
volume = "31",
number = "1-2",
pages = "19-27",
doi = "10.1016/j.jeurceramsoc.2010.09.006"
}
Lukic, M., Stojanović, Z. S., Škapin, S. D., Macek-Krzmanc, M., Mitrić, M., Markovic, S.,& Uskoković, D. (2011). Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering.
Journal of the European Ceramic Society, 31(1-2), 19-27.
https://doi.org/10.1016/j.jeurceramsoc.2010.09.006
Lukic M, Stojanović ZS, Škapin SD, Macek-Krzmanc M, Mitrić M, Markovic S, Uskoković D. Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering. Journal of the European Ceramic Society. 2011;31(1-2):19-27
Lukic M., Stojanović Zoran S., Škapin Srečo Davor, Macek-Krzmanc M., Mitrić Miodrag, Markovic S., Uskoković Dragan, "Dense fine-grained biphasic calcium phosphate (BCP) bioceramics designed by two-step sintering" Journal of the European Ceramic Society, 31, no. 1-2 (2011):19-27,
https://doi.org/10.1016/j.jeurceramsoc.2010.09.006 .
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