TY  - JOUR
AU  - Aleksić, Jelena
AU  - Barudžija, Tanja
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Bošković, Marko
AU  - Jagličić, Zvonko
AU  - Lisjak, Darja
AU  - Kostić, Ljiljana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8858
AB  - In this investigation, we have synthesized YbxY1-xF3 solid solutions by fluorination of yttrium and ytterbium sesquioxides with ammonium hydrogen difluoride. According to the XRD analysis, all synthesized YbxY1-xF3 samples have an orthorhombic crystal structure belonging to the β-YF3 structural type. The refinement of crystal structure was done by the Rietveld method within the Pnma space group using the TCH pseudo-Voigt function. The anisotropic peak broadening was analyzed, and the average apparent crystallite size is about 50 nm with a small anisotropy of shape, while the significant microstrain that is highly anisotropic is present in all samples. The temperature-dependent magnetic susceptibility was analyzed by applying the model of a free ion perturbed by the crystal field. We have obtained the effective magnetic quantum numbers Mieff of four Kramer's doublets of Yb3+ ion along with the entire crystal field splitting of the 2F7/2 manifold of Yb3+ in YF3. The acquired maximum energy splitting of the ground level is about 150 K in our most diluted samples. The field-dependent isothermal magnetization measurements were carried out at various temperatures and analyzed by classical Langevin function. Results obtained from magnetic measurements show that all YbxY1-xF3 (x ≠ 0) solid solutions exhibit pure paramagnetic behavior in the whole temperature range from 2 to 300 K, with a predominant antiferromagnetic exchange interactions. © 2020 Elsevier Ltd
T2  - Journal of Physics and Chemistry of Solids
T1  - Investigation of structural, microstructural and magnetic properties of YbxY1-xF3 solid solutions
VL  - 142
SP  - 109449
DO  - 10.1016/j.jpcs.2020.109449
ER  - 

@article{
author = "Aleksić, Jelena and Barudžija, Tanja and Jugović, Dragana and Mitrić, Miodrag and Bošković, Marko and Jagličić, Zvonko and Lisjak, Darja and Kostić, Ljiljana",
year = "2020",
abstract = "In this investigation, we have synthesized YbxY1-xF3 solid solutions by fluorination of yttrium and ytterbium sesquioxides with ammonium hydrogen difluoride. According to the XRD analysis, all synthesized YbxY1-xF3 samples have an orthorhombic crystal structure belonging to the β-YF3 structural type. The refinement of crystal structure was done by the Rietveld method within the Pnma space group using the TCH pseudo-Voigt function. The anisotropic peak broadening was analyzed, and the average apparent crystallite size is about 50 nm with a small anisotropy of shape, while the significant microstrain that is highly anisotropic is present in all samples. The temperature-dependent magnetic susceptibility was analyzed by applying the model of a free ion perturbed by the crystal field. We have obtained the effective magnetic quantum numbers Mieff of four Kramer's doublets of Yb3+ ion along with the entire crystal field splitting of the 2F7/2 manifold of Yb3+ in YF3. The acquired maximum energy splitting of the ground level is about 150 K in our most diluted samples. The field-dependent isothermal magnetization measurements were carried out at various temperatures and analyzed by classical Langevin function. Results obtained from magnetic measurements show that all YbxY1-xF3 (x ≠ 0) solid solutions exhibit pure paramagnetic behavior in the whole temperature range from 2 to 300 K, with a predominant antiferromagnetic exchange interactions. © 2020 Elsevier Ltd",
journal = "Journal of Physics and Chemistry of Solids",
title = "Investigation of structural, microstructural and magnetic properties of YbxY1-xF3 solid solutions",
volume = "142",
pages = "109449",
doi = "10.1016/j.jpcs.2020.109449"
}

Aleksić, J., Barudžija, T., Jugović, D., Mitrić, M., Bošković, M., Jagličić, Z., Lisjak, D.,& Kostić, L.. (2020). Investigation of structural, microstructural and magnetic properties of YbxY1-xF3 solid solutions. in Journal of Physics and Chemistry of Solids, 142, 109449.
https://doi.org/10.1016/j.jpcs.2020.109449

Aleksić J, Barudžija T, Jugović D, Mitrić M, Bošković M, Jagličić Z, Lisjak D, Kostić L. Investigation of structural, microstructural and magnetic properties of YbxY1-xF3 solid solutions. in Journal of Physics and Chemistry of Solids. 2020;142:109449.
doi:10.1016/j.jpcs.2020.109449 .

Aleksić, Jelena, Barudžija, Tanja, Jugović, Dragana, Mitrić, Miodrag, Bošković, Marko, Jagličić, Zvonko, Lisjak, Darja, Kostić, Ljiljana, "Investigation of structural, microstructural and magnetic properties of YbxY1-xF3 solid solutions" in Journal of Physics and Chemistry of Solids, 142 (2020):109449,
https://doi.org/10.1016/j.jpcs.2020.109449 . .

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  - https://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",
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. in 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. in Scientific Reports. 2019;9(1):16305.
doi:10.1038/s41598-019-52885-0 .

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" in Scientific Reports, 9, no. 1 (2019):16305,
https://doi.org/10.1038/s41598-019-52885-0 . .

TY  - JOUR
AU  - Ivanovski, Valentin N.
AU  - Belošević-Čavor, Jelena
AU  - Rajić, Vladimir
AU  - Umićević, Ana
AU  - Marković, Smilja
AU  - Kusigerski, Vladan
AU  - Mitrić, Miodrag
AU  - Koteski, Vasil J.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8515
AB  - In order to study the effect of Fe cation substitution on the local structure, defect formation, and hyperfine interactions in ZnO, Mössbauer spectroscopy measurements of the microwave processed Zn 1 - x Fe x O (x = 0.05, 0.10, 0.15, and 0.20) nanoparticles, together with ab initio calculations, were performed. Complementary information on the distribution of particle size and morphology, as well as magnetic properties, were obtained by X-ray diffraction, transmission electron microscopy, and squid-magnetometry. The selected model for analyzing the Mössbauer spectra of our samples is a distribution of quadrupole splittings. The fitting model with two Lorentz doublets was rejected due to its failure to include larger doublets. The Fe 3 + ions do not yield magnetic ordering in the samples at room temperature. The results from first-principles calculations confirm that the major component of the Mössbauer spectra corresponds to the Fe-alloyed ZnO with Zn vacancy in the next nearest neighbor environment. The magnetic measurements are consistent with the description of the distribution of iron ions over the randomly formed clusters in the ZnO host lattice. While at room temperature all the samples are paramagnetic, magnetic interactions cause a transition into a cluster spin-glass state at low temperatures. © 2019 Author(s).
T2  - Journal of Applied Physics
T1  - A study of defect structures in Fe-alloyed ZnO: Morphology, magnetism, and hyperfine interactions
VL  - 126
IS  - 12
SP  - 125703
DO  - 10.1063/1.5095837
ER  - 

@article{
author = "Ivanovski, Valentin N. and Belošević-Čavor, Jelena and Rajić, Vladimir and Umićević, Ana and Marković, Smilja and Kusigerski, Vladan and Mitrić, Miodrag and Koteski, Vasil J.",
year = "2019",
abstract = "In order to study the effect of Fe cation substitution on the local structure, defect formation, and hyperfine interactions in ZnO, Mössbauer spectroscopy measurements of the microwave processed Zn 1 - x Fe x O (x = 0.05, 0.10, 0.15, and 0.20) nanoparticles, together with ab initio calculations, were performed. Complementary information on the distribution of particle size and morphology, as well as magnetic properties, were obtained by X-ray diffraction, transmission electron microscopy, and squid-magnetometry. The selected model for analyzing the Mössbauer spectra of our samples is a distribution of quadrupole splittings. The fitting model with two Lorentz doublets was rejected due to its failure to include larger doublets. The Fe 3 + ions do not yield magnetic ordering in the samples at room temperature. The results from first-principles calculations confirm that the major component of the Mössbauer spectra corresponds to the Fe-alloyed ZnO with Zn vacancy in the next nearest neighbor environment. The magnetic measurements are consistent with the description of the distribution of iron ions over the randomly formed clusters in the ZnO host lattice. While at room temperature all the samples are paramagnetic, magnetic interactions cause a transition into a cluster spin-glass state at low temperatures. © 2019 Author(s).",
journal = "Journal of Applied Physics",
title = "A study of defect structures in Fe-alloyed ZnO: Morphology, magnetism, and hyperfine interactions",
volume = "126",
number = "12",
pages = "125703",
doi = "10.1063/1.5095837"
}

Ivanovski, V. N., Belošević-Čavor, J., Rajić, V., Umićević, A., Marković, S., Kusigerski, V., Mitrić, M.,& Koteski, V. J.. (2019). A study of defect structures in Fe-alloyed ZnO: Morphology, magnetism, and hyperfine interactions. in Journal of Applied Physics, 126(12), 125703.
https://doi.org/10.1063/1.5095837

Ivanovski VN, Belošević-Čavor J, Rajić V, Umićević A, Marković S, Kusigerski V, Mitrić M, Koteski VJ. A study of defect structures in Fe-alloyed ZnO: Morphology, magnetism, and hyperfine interactions. in Journal of Applied Physics. 2019;126(12):125703.
doi:10.1063/1.5095837 .

Ivanovski, Valentin N., Belošević-Čavor, Jelena, Rajić, Vladimir, Umićević, Ana, Marković, Smilja, Kusigerski, Vladan, Mitrić, Miodrag, Koteski, Vasil J., "A study of defect structures in Fe-alloyed ZnO: Morphology, magnetism, and hyperfine interactions" in Journal of Applied Physics, 126, no. 12 (2019):125703,
https://doi.org/10.1063/1.5095837 . .

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  - https://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",
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. in 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. in Journal of Alloys and Compounds. 2019;786:912-919.
doi:10.1016/j.jallcom.2019.01.392 .

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" in Journal of Alloys and Compounds, 786 (2019):912-919,
https://doi.org/10.1016/j.jallcom.2019.01.392 . .

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  - https://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",
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. in 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. in Journal of Alloys and Compounds. 2019;786:912-919.
doi:10.1016/j.jallcom.2019.01.392 .

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" in Journal of Alloys and Compounds, 786 (2019):912-919,
https://doi.org/10.1016/j.jallcom.2019.01.392 . .

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  - https://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",
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. in 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. in Journal of Alloys and Compounds. 2019;774:30-37.
doi:10.1016/j.jallcom.2018.09.372 .

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" in Journal of Alloys and Compounds, 774 (2019):30-37,
https://doi.org/10.1016/j.jallcom.2018.09.372 . .

TY  - JOUR
AU  - Georgijević, Radovan
AU  - Vujković, Milica
AU  - Gutić, Sanjin J.
AU  - Aliefendić, Meho
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Đokić, Veljko R.
AU  - Mentus, Slavko V.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7936
AB  - To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.
T2  - Journal of Alloys and Compounds
T1  - The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution
VL  - 776
SP  - 475
EP  - 485
DO  - 10.1016/j.jallcom.2018.10.246
ER  - 

@article{
author = "Georgijević, Radovan and Vujković, Milica and Gutić, Sanjin J. and Aliefendić, Meho and Jugović, Dragana and Mitrić, Miodrag and Đokić, Veljko R. and Mentus, Slavko V.",
year = "2019",
abstract = "To contribute to the knowledge on the influence of synthesis procedure on the intercalation kinetics of lithium ions into phospho-olivines, LiFePO4/C composite samples (LFPC) were synthesized in two ways, the first one in a sol-gel procedure (SG), and the other in a solid-state reaction (SS). The X-ray diffractograms (XRD) of both samples overlapped with that of pure LiFePO4, taken from the crystallographic database. Scanning electron microscopy pictures indicated the high degree of interparticle sintering, which caused a considerable agglomerate growth. The results of potentiodynamic measurements in aqueous LiNO3 solution revealed that for SS sample, three times higher initial capacity from that of SG one, (amounting to 74 mAh g−1 at 5 mV s−1). However, capacity fade on rising scan rate is much more expressed for SS sample than for SG one. We suggest that a different degree of material utilization due to the incomplete coverage of olivine particles by carbon explains this difference. The technique of separation of diffusion and capacitance currents was applied in a kinetic analysis, but it was shown to be inappropriate. We suggest the inapplicability of classic CV theory to the intercalation system accompanied by phase transition. Instead, a model of ohmic resistance determination of process kinetics was considered. LFPC-SS sample delivers three times larger capacity in LiNO3, amounting to 74 mAh g−1 at 1 mV s−1.",
journal = "Journal of Alloys and Compounds",
title = "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution",
volume = "776",
pages = "475-485",
doi = "10.1016/j.jallcom.2018.10.246"
}

Georgijević, R., Vujković, M., Gutić, S. J., Aliefendić, M., Jugović, D., Mitrić, M., Đokić, V. R.,& Mentus, S. V.. (2019). The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds, 776, 475-485.
https://doi.org/10.1016/j.jallcom.2018.10.246

Georgijević R, Vujković M, Gutić SJ, Aliefendić M, Jugović D, Mitrić M, Đokić VR, Mentus SV. The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution. in Journal of Alloys and Compounds. 2019;776:475-485.
doi:10.1016/j.jallcom.2018.10.246 .

Georgijević, Radovan, Vujković, Milica, Gutić, Sanjin J., Aliefendić, Meho, Jugović, Dragana, Mitrić, Miodrag, Đokić, Veljko R., Mentus, Slavko V., "The influence of synthesis conditions on the redox behaviour of LiFePO4 in aqueous solution" in Journal of Alloys and Compounds, 776 (2019):475-485,
https://doi.org/10.1016/j.jallcom.2018.10.246 . .

TY  - JOUR
AU  - Milović, Miloš
AU  - Vasić Anićijević, Dragana D.
AU  - Jugović, Dragana
AU  - Anićijević, Vladan J.
AU  - Veselinović, Ljiljana M.
AU  - Mitrić, Miodrag
AU  - Uskoković, Dragan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8017
AB  - Li2FeSiO4 material, which was prepared by a solid state method, crystallized as monoclinic P21/n polymorph. X-ray diffraction analysis with Rietveld structural refinement indicates specific occupation of Li2 crystallographic site by Fe2+ cation in the amount of 6 atom percents as a result of an antisite defect formation. The exclusive occupation of Li2 position, out of two crystallographic positions Li1 and Li2, by Fe2+ was discussed in relation to the differences that exist in the crystal environment of these positions and further investigated by DFT calculations. It was confirmed that Fe-Li2 substitution is energetically favorable compared to both Fe-Li1 substitution and the pristine crystal. In addition, changes of lattice geometry upon antisite defect formation were analyzed, and the obtained result is discussed in light of various factors (electronic, geometrical and enthropic) that contribute to the overall stability of the system. © 2018 Elsevier Masson SAS
T2  - Solid State Sciences
T1  - On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study
VL  - 87
SP  - 81
EP  - 86
DO  - 10.1016/j.solidstatesciences.2018.11.008
ER  - 

@article{
author = "Milović, Miloš and Vasić Anićijević, Dragana D. and Jugović, Dragana and Anićijević, Vladan J. and Veselinović, Ljiljana M. and Mitrić, Miodrag and Uskoković, Dragan",
year = "2019",
abstract = "Li2FeSiO4 material, which was prepared by a solid state method, crystallized as monoclinic P21/n polymorph. X-ray diffraction analysis with Rietveld structural refinement indicates specific occupation of Li2 crystallographic site by Fe2+ cation in the amount of 6 atom percents as a result of an antisite defect formation. The exclusive occupation of Li2 position, out of two crystallographic positions Li1 and Li2, by Fe2+ was discussed in relation to the differences that exist in the crystal environment of these positions and further investigated by DFT calculations. It was confirmed that Fe-Li2 substitution is energetically favorable compared to both Fe-Li1 substitution and the pristine crystal. In addition, changes of lattice geometry upon antisite defect formation were analyzed, and the obtained result is discussed in light of various factors (electronic, geometrical and enthropic) that contribute to the overall stability of the system. © 2018 Elsevier Masson SAS",
journal = "Solid State Sciences",
title = "On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study",
volume = "87",
pages = "81-86",
doi = "10.1016/j.solidstatesciences.2018.11.008"
}

Milović, M., Vasić Anićijević, D. D., Jugović, D., Anićijević, V. J., Veselinović, L. M., Mitrić, M.,& Uskoković, D.. (2019). On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study. in Solid State Sciences, 87, 81-86.
https://doi.org/10.1016/j.solidstatesciences.2018.11.008

Milović M, Vasić Anićijević DD, Jugović D, Anićijević VJ, Veselinović LM, Mitrić M, Uskoković D. On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study. in Solid State Sciences. 2019;87:81-86.
doi:10.1016/j.solidstatesciences.2018.11.008 .

Milović, Miloš, Vasić Anićijević, Dragana D., Jugović, Dragana, Anićijević, Vladan J., Veselinović, Ljiljana M., Mitrić, Miodrag, Uskoković, Dragan, "On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study" in Solid State Sciences, 87 (2019):81-86,
https://doi.org/10.1016/j.solidstatesciences.2018.11.008 . .

TY  - JOUR
AU  - Milović, Miloš
AU  - Vasić Anićijević, Dragana D.
AU  - Jugović, Dragana
AU  - Anićijević, Vladan J.
AU  - Veselinović, Ljiljana M.
AU  - Mitrić, Miodrag
AU  - Uskoković, Dragan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8021
AB  - Li2FeSiO4 material, which was prepared by a solid state method, crystallized as monoclinic P21/n polymorph. X-ray diffraction analysis with Rietveld structural refinement indicates specific occupation of Li2 crystallographic site by Fe2+ cation in the amount of 6 atom percents as a result of an antisite defect formation. The exclusive occupation of Li2 position, out of two crystallographic positions Li1 and Li2, by Fe2+ was discussed in relation to the differences that exist in the crystal environment of these positions and further investigated by DFT calculations. It was confirmed that Fe-Li2 substitution is energetically favorable compared to both Fe-Li1 substitution and the pristine crystal. In addition, changes of lattice geometry upon antisite defect formation were analyzed, and the obtained result is discussed in light of various factors (electronic, geometrical and enthropic) that contribute to the overall stability of the system. © 2018 Elsevier Masson SAS
T2  - Solid State Sciences
T1  - On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study
VL  - 87
SP  - 81
EP  - 86
DO  - 10.1016/j.solidstatesciences.2018.11.008
ER  - 

@article{
author = "Milović, Miloš and Vasić Anićijević, Dragana D. and Jugović, Dragana and Anićijević, Vladan J. and Veselinović, Ljiljana M. and Mitrić, Miodrag and Uskoković, Dragan",
year = "2019",
abstract = "Li2FeSiO4 material, which was prepared by a solid state method, crystallized as monoclinic P21/n polymorph. X-ray diffraction analysis with Rietveld structural refinement indicates specific occupation of Li2 crystallographic site by Fe2+ cation in the amount of 6 atom percents as a result of an antisite defect formation. The exclusive occupation of Li2 position, out of two crystallographic positions Li1 and Li2, by Fe2+ was discussed in relation to the differences that exist in the crystal environment of these positions and further investigated by DFT calculations. It was confirmed that Fe-Li2 substitution is energetically favorable compared to both Fe-Li1 substitution and the pristine crystal. In addition, changes of lattice geometry upon antisite defect formation were analyzed, and the obtained result is discussed in light of various factors (electronic, geometrical and enthropic) that contribute to the overall stability of the system. © 2018 Elsevier Masson SAS",
journal = "Solid State Sciences",
title = "On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study",
volume = "87",
pages = "81-86",
doi = "10.1016/j.solidstatesciences.2018.11.008"
}

Milović, M., Vasić Anićijević, D. D., Jugović, D., Anićijević, V. J., Veselinović, L. M., Mitrić, M.,& Uskoković, D.. (2019). On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study. in Solid State Sciences, 87, 81-86.
https://doi.org/10.1016/j.solidstatesciences.2018.11.008

Milović M, Vasić Anićijević DD, Jugović D, Anićijević VJ, Veselinović LM, Mitrić M, Uskoković D. On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study. in Solid State Sciences. 2019;87:81-86.
doi:10.1016/j.solidstatesciences.2018.11.008 .

Milović, Miloš, Vasić Anićijević, Dragana D., Jugović, Dragana, Anićijević, Vladan J., Veselinović, Ljiljana M., Mitrić, Miodrag, Uskoković, Dragan, "On the presence of antisite defect in monoclinic Li2FeSiO4 – A combined X-Ray diffraction and DFT study" in Solid State Sciences, 87 (2019):81-86,
https://doi.org/10.1016/j.solidstatesciences.2018.11.008 . .

TY  - CHAP
AU  - Vranješ-Đurić, Sanja
AU  - Ignjatović, Nenad L.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/16001
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7572
AB  - Nuclear medicine is a branch of medicine that uses radiation to provide infor¬mation about the functioning of a person’s specific tissue/organs or to treat a disease. Radiolabeled nanoparticles (NPs) represent a new class of agents with a great potential for nuclear medicine applications. The key advantage of using radiolabeled NPs is that a very small amount can be used to obtain information of great importance.1 They may be used to detect and characterize disease, to deliver relevant therapeutics, and to monitor the therapeutic effect as well. Furthermore radiotracer-based imaging either using single-photon emission computed tomog¬raphy (SPECT) or positron emission tomography (PET) is particularly suited in the study of pharmacokinetic/pharmacodynamic parameters of nanomaterials and determination of their optimal nanodimensional architecture for tissue/organ re¬generation. Measuring radiation from radioactive tracers attached to NPs has been demonstrated to be a highly sensitive and specific method that allows accurate quantification, without limits to tissue penetration in any organ. Nuclear imaging approaches are highly suitable for detection, as they offer a high detection sensitiv¬ity at high temporal and spatial resolutions, requiring a radionuclide concentration of around 10−10 M at the site of interest.Nanoparticulate agents typically demonstrate pharmacokinetic behavior differ¬ent from that of small molecules2 and provide flexible platforms for integration of multiple functional entities, including targeting ligands, multiple types of contrast materials, and/or therapeutics. In contrast to traditional compounds used for radio¬pharmaceutical preparation, nanomaterials have an immense available surface area per unit of volume and tunable optical, electronic, magnetic, and biological proper¬ties. Generally, they can be tailored to meet the needs of specific applications and engineered to have different physicochemical properties that affect in vivo biodis¬tribution: sizes, shapes, chemical compositions, surface chemical characteristics, and hollow or solid structures.3 Efficient diagnosis/radiotherapy is provided through passive targeting based on the enhanced permeability and retention (EPR) effect and/or active targeting through the incorporation of a targeting moiety on an NP. Nontargeted NPs can accumulate in tumors, as the tumor vasculature is usually leaky and without lymphatic drainage. Active targeting is achieved by functionalizing the NPs surface with suitable vectors, including peptides, antibodies, and other biomolecules, which recognize characteristic epitopes at the surface of the diseased cells.Radiolabeled antibodies may effectively target even single cancer cells in circula¬tion5 or small cancer cell clusters,6 thereby enabling a more specific radiation dose delivery, preventing damage to healthy tissues.
PB  - Elsevier
T2  - Nanotechnologies in Preventive and Regenerative Medicine:  An Emerging Big Picture
T1  - Subchapter 1.4: Radiolabeled functional nanoparticles in preventive and regenerative medicine
VL  - (2018)
SP  - 65
EP  - 92
DO  - 10.1016/B978-0-323-48063-5.00001-0
ER  - 

@inbook{
author = "Vranješ-Đurić, Sanja and Ignjatović, Nenad L.",
year = "2018",
abstract = "Nuclear medicine is a branch of medicine that uses radiation to provide infor¬mation about the functioning of a person’s specific tissue/organs or to treat a disease. Radiolabeled nanoparticles (NPs) represent a new class of agents with a great potential for nuclear medicine applications. The key advantage of using radiolabeled NPs is that a very small amount can be used to obtain information of great importance.1 They may be used to detect and characterize disease, to deliver relevant therapeutics, and to monitor the therapeutic effect as well. Furthermore radiotracer-based imaging either using single-photon emission computed tomog¬raphy (SPECT) or positron emission tomography (PET) is particularly suited in the study of pharmacokinetic/pharmacodynamic parameters of nanomaterials and determination of their optimal nanodimensional architecture for tissue/organ re¬generation. Measuring radiation from radioactive tracers attached to NPs has been demonstrated to be a highly sensitive and specific method that allows accurate quantification, without limits to tissue penetration in any organ. Nuclear imaging approaches are highly suitable for detection, as they offer a high detection sensitiv¬ity at high temporal and spatial resolutions, requiring a radionuclide concentration of around 10−10 M at the site of interest.Nanoparticulate agents typically demonstrate pharmacokinetic behavior differ¬ent from that of small molecules2 and provide flexible platforms for integration of multiple functional entities, including targeting ligands, multiple types of contrast materials, and/or therapeutics. In contrast to traditional compounds used for radio¬pharmaceutical preparation, nanomaterials have an immense available surface area per unit of volume and tunable optical, electronic, magnetic, and biological proper¬ties. Generally, they can be tailored to meet the needs of specific applications and engineered to have different physicochemical properties that affect in vivo biodis¬tribution: sizes, shapes, chemical compositions, surface chemical characteristics, and hollow or solid structures.3 Efficient diagnosis/radiotherapy is provided through passive targeting based on the enhanced permeability and retention (EPR) effect and/or active targeting through the incorporation of a targeting moiety on an NP. Nontargeted NPs can accumulate in tumors, as the tumor vasculature is usually leaky and without lymphatic drainage. Active targeting is achieved by functionalizing the NPs surface with suitable vectors, including peptides, antibodies, and other biomolecules, which recognize characteristic epitopes at the surface of the diseased cells.Radiolabeled antibodies may effectively target even single cancer cells in circula¬tion5 or small cancer cell clusters,6 thereby enabling a more specific radiation dose delivery, preventing damage to healthy tissues.",
publisher = "Elsevier",
journal = "Nanotechnologies in Preventive and Regenerative Medicine:  An Emerging Big Picture",
booktitle = "Subchapter 1.4: Radiolabeled functional nanoparticles in preventive and regenerative medicine",
volume = "(2018)",
pages = "65-92",
doi = "10.1016/B978-0-323-48063-5.00001-0"
}

Vranješ-Đurić, S.,& Ignjatović, N. L.. (2018). Subchapter 1.4: Radiolabeled functional nanoparticles in preventive and regenerative medicine. in Nanotechnologies in Preventive and Regenerative Medicine:  An Emerging Big Picture
Elsevier., (2018), 65-92.
https://doi.org/10.1016/B978-0-323-48063-5.00001-0

Vranješ-Đurić S, Ignjatović NL. Subchapter 1.4: Radiolabeled functional nanoparticles in preventive and regenerative medicine. in Nanotechnologies in Preventive and Regenerative Medicine:  An Emerging Big Picture. 2018;(2018):65-92.
doi:10.1016/B978-0-323-48063-5.00001-0 .

Vranješ-Đurić, Sanja, Ignjatović, Nenad L., "Subchapter 1.4: Radiolabeled functional nanoparticles in preventive and regenerative medicine" in Nanotechnologies in Preventive and Regenerative Medicine:  An Emerging Big Picture, (2018) (2018):65-92,
https://doi.org/10.1016/B978-0-323-48063-5.00001-0 . .

TY  - JOUR
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7580
AB  - The present study describes sintering behaviour of hydroxyapatite (HAp) upon addition of lithium iron phosphate (LFP) (1-10 wt.%) system in inert (Ar) atmosphere. The interaction between materials and melting of LFP influenced early and intermediate stages of HAp sintering, shifting the densification curves towards low-temperature side. Analysis of densification process indicated significant differences upon LFP addition. The reaction mechanism that assumes the initial interaction between phosphates from LFP and calcium from HAp was proposed, generating calcium vacancies and contributing to HAp densification. Cross-sections of sintered samples showed changes in microstructural properties, with uniform atomic distribution and presence of Li2Fe3O4 spherical inclusions (200 nm) located at grain boundaries of calcium phosphate matrix. The Rietveld refinement analysis indicated changes in structural and microstructural parameters like crystallite size, anisotropy and microstructural strain of HAp upon LFP addition. Mechanical characterisation indicated improvements in fracture behaviour upon LFP addition.
T2  - Journal of the European Ceramic Society
T1  - Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate
VL  - 38
SP  - 2120
EP  - 2133
DO  - 10.1016/j.jeurceramsoc.2017.12.023
ER  - 

@article{
year = "2018",
abstract = "The present study describes sintering behaviour of hydroxyapatite (HAp) upon addition of lithium iron phosphate (LFP) (1-10 wt.%) system in inert (Ar) atmosphere. The interaction between materials and melting of LFP influenced early and intermediate stages of HAp sintering, shifting the densification curves towards low-temperature side. Analysis of densification process indicated significant differences upon LFP addition. The reaction mechanism that assumes the initial interaction between phosphates from LFP and calcium from HAp was proposed, generating calcium vacancies and contributing to HAp densification. Cross-sections of sintered samples showed changes in microstructural properties, with uniform atomic distribution and presence of Li2Fe3O4 spherical inclusions (200 nm) located at grain boundaries of calcium phosphate matrix. The Rietveld refinement analysis indicated changes in structural and microstructural parameters like crystallite size, anisotropy and microstructural strain of HAp upon LFP addition. Mechanical characterisation indicated improvements in fracture behaviour upon LFP addition.",
journal = "Journal of the European Ceramic Society",
title = "Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate",
volume = "38",
pages = "2120-2133",
doi = "10.1016/j.jeurceramsoc.2017.12.023"
}

(2018). Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate. in Journal of the European Ceramic Society, 38, 2120-2133.
https://doi.org/10.1016/j.jeurceramsoc.2017.12.023

Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate. in Journal of the European Ceramic Society. 2018;38:2120-2133.
doi:10.1016/j.jeurceramsoc.2017.12.023 .

"Inert atmosphere processing of hydroxyapatite in the presence of lithium iron phosphate" in Journal of the European Ceramic Society, 38 (2018):2120-2133,
https://doi.org/10.1016/j.jeurceramsoc.2017.12.023 . .

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://dais.sanu.ac.rs/123456789/15439
UR  - https://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
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7560
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",
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",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7560"
}

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. in 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.
https://hdl.handle.net/21.15107/rcub_vinar_7560

Uskoković D, Radmilović VR, Jugović D, Milović M, Mitrić M, Cvjetićanin N, Škapin SD, Uskoković D. Synthesis and characterization of Li2FeP2O7 cathode material. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:46-46.
https://hdl.handle.net/21.15107/rcub_vinar_7560 .

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" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):46-46,
https://hdl.handle.net/21.15107/rcub_vinar_7560 .

TY  - CONF
AU  - Aleksić, Jelena
AU  - Jugović, Dragana
AU  - Milović, Miloš
AU  - Mitrić, Miodrag
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7564
AB  - Sodium transition-metal oxides with general formula NaxTMO2 (TM = Co, Mn, Ni, etc.) have attracted a lot of interest in the battery community due to low cost of sodium in contrast to lithium. Sodium cobalt oxide is the most attractive of them for cathode application because of its conductive, thermic and magnetic characteristics. In this study, sodium cobalt oxide, NaxCoO2 , was synthesized by simple method which involves solid state reaction in air, at temperature of 900 ºC; starting materials were Na2CO3 and Co3O4 in stoichiometric amounts. Additionally, fluorination of the synthesized sodium cobalt oxide was carried out in vacuum at 200ºC; NH4HF2 was used as a fluorine source. Then, structural and microstructural properties of the obtained powders were examined.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia
T1  - Synthesis and structural properties of sodium cobalt oxide
SP  - 37
EP  - 37
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7564
ER  - 

@conference{
editor = "Marković, Smilja",
author = "Aleksić, Jelena and Jugović, Dragana and Milović, Miloš and Mitrić, Miodrag and Uskoković, Dragan",
year = "2017",
abstract = "Sodium transition-metal oxides with general formula NaxTMO2 (TM = Co, Mn, Ni, etc.) have attracted a lot of interest in the battery community due to low cost of sodium in contrast to lithium. Sodium cobalt oxide is the most attractive of them for cathode application because of its conductive, thermic and magnetic characteristics. In this study, sodium cobalt oxide, NaxCoO2 , was synthesized by simple method which involves solid state reaction in air, at temperature of 900 ºC; starting materials were Na2CO3 and Co3O4 in stoichiometric amounts. Additionally, fluorination of the synthesized sodium cobalt oxide was carried out in vacuum at 200ºC; NH4HF2 was used as a fluorine source. Then, structural and microstructural properties of the obtained powders were examined.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia",
title = "Synthesis and structural properties of sodium cobalt oxide",
pages = "37-37",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7564"
}

Marković, S., Aleksić, J., Jugović, D., Milović, M., Mitrić, M.,& Uskoković, D.. (2017). Synthesis and structural properties of sodium cobalt oxide. in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia
Belgrade : Institute of Technical Sciences of SASA., 37-37.
https://hdl.handle.net/21.15107/rcub_vinar_7564

Marković S, Aleksić J, Jugović D, Milović M, Mitrić M, Uskoković D. Synthesis and structural properties of sodium cobalt oxide. in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia. 2017;:37-37.
https://hdl.handle.net/21.15107/rcub_vinar_7564 .

Marković, Smilja, Aleksić, Jelena, Jugović, Dragana, Milović, Miloš, Mitrić, Miodrag, Uskoković, Dragan, "Synthesis and structural properties of sodium cobalt oxide" in Program and the Book of Abstracts / Sixteenth Young Researchers' Conference Materials Sciences and Engineering, December 6-8, 2017, Belgrade, Serbia (2017):37-37,
https://hdl.handle.net/21.15107/rcub_vinar_7564 .

TY  - JOUR
AU  - Lukić, Miodrag J.
AU  - Sezen, Meltem
AU  - Veljović, Đorđe N.
AU  - Mraković, Ana Đ.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1682
AB  - The densification behavior of hydroxyapatite nanorods prepared by chemical precipitation method in open reactor conditions was investigated by application of different heating rates. The non-isothermal processing was performed with 2, 10, and 50 degrees C/min up to 1200 degrees C and yielded fully dense ceramics. The implementation of the higher heating rate provided grain size refinement from micrometer level for the slowest ramp, down to 250 nm in the case of processing with 50 degrees C/min, without any drawbacks regarding final density. The relative amount of retained structural hydroxyl groups in sintered ceramics was gradually increased with the heating rate. Furthermore, the qualitative level of optical translucency was increased with a higher heating rate which can be explained by the beneficial alignment of HAp nanorods during the fast heating rate processing, achieved microstructural refinement, and higher amount of structural hydroxyl groups. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Materials Letters
T1  - A facile route for hydroxyapatite densification with an increased heating rate
VL  - 207
SP  - 12
EP  - 15
DO  - 10.1016/j.matlet.2017.07.020
ER  - 

@article{
author = "Lukić, Miodrag J. and Sezen, Meltem and Veljović, Đorđe N. and Mraković, Ana Đ.",
year = "2017",
abstract = "The densification behavior of hydroxyapatite nanorods prepared by chemical precipitation method in open reactor conditions was investigated by application of different heating rates. The non-isothermal processing was performed with 2, 10, and 50 degrees C/min up to 1200 degrees C and yielded fully dense ceramics. The implementation of the higher heating rate provided grain size refinement from micrometer level for the slowest ramp, down to 250 nm in the case of processing with 50 degrees C/min, without any drawbacks regarding final density. The relative amount of retained structural hydroxyl groups in sintered ceramics was gradually increased with the heating rate. Furthermore, the qualitative level of optical translucency was increased with a higher heating rate which can be explained by the beneficial alignment of HAp nanorods during the fast heating rate processing, achieved microstructural refinement, and higher amount of structural hydroxyl groups. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Materials Letters",
title = "A facile route for hydroxyapatite densification with an increased heating rate",
volume = "207",
pages = "12-15",
doi = "10.1016/j.matlet.2017.07.020"
}

Lukić, M. J., Sezen, M., Veljović, Đ. N.,& Mraković, A. Đ.. (2017). A facile route for hydroxyapatite densification with an increased heating rate. in Materials Letters, 207, 12-15.
https://doi.org/10.1016/j.matlet.2017.07.020

Lukić MJ, Sezen M, Veljović ĐN, Mraković AĐ. A facile route for hydroxyapatite densification with an increased heating rate. in Materials Letters. 2017;207:12-15.
doi:10.1016/j.matlet.2017.07.020 .

Lukić, Miodrag J., Sezen, Meltem, Veljović, Đorđe N., Mraković, Ana Đ., "A facile route for hydroxyapatite densification with an increased heating rate" in Materials Letters, 207 (2017):12-15,
https://doi.org/10.1016/j.matlet.2017.07.020 . .

TY  - CONF
AU  - Ignjatović, Nenad L.
AU  - Penov Gaši, Katarina
AU  - Ajduković, Jovana
AU  - Sakač, Marija
AU  - Kuzminac, Ivana
AU  - Kojić, Vesna V.
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2017
UR  - http://dais.sanu.ac.rs/123456789/15442
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7563
AB  - Hybrid systems based on nano hydroxyapatites (HAp) are the subject of numerous studies in preventive and regenerative medicine. Special interests are directed towards the creation of a system based on HAp for use in a nano-oncology. The main objective of this research is directed towards the creation of a system with cytotoxic properties towards the cancer cells with the same time, minimum side effects. Carriers base on core shell of HAp/chitosan-poly(D,L)-lactide-coglycolide (PLGA) loaded with androstane-based cancer inhibitor could be seen as promising drug delivery platforms for selective cancer therapies.In this study we utilize an emulsification process and freeze drying to load the composite particles based on HAp nanocarrier, chitosane (Ch), PLGA and chitosan oligosaccharide lactate (ChOL) with 17β-hydroxy-17α-picolyl-androst-5-en-3β-acetate (A) and 3β,17β-dihydroxy-16-hydroxymino-androst-5-en (B), a chemotherapeutic derivatives of androstane. The picolyl androstane derivatives showed high potency in the cell inhibitors of hormone-dependent cancers (lung, prostate and colon cancer; adeno and cervix carcinoma; etc.).1H NMR, 13C NMR and high-resolution time-of-flight mass spectrometry (MS) techniques confirmed the intact structure of the derivatives A and B. The thermogravimetric and differential thermal analysis (TGA, DTA) coupled with mass spectrometry was used to qualitatively confirm the drug loading process. FT-IR, XRD, AFM and DSC techniques have confirmed the success of androstane (A and B) loading process in core shell particles base on nano hydroxyapatite. All the synthesized particles were found to be spherical in shape with a uniform size distribution from d50=167 to d50=231 nm. Highly selective anticancer activity was noted towards the human lung carcinoma (A549) by A loaded HAp/Ch-PLGA and towards the human breast adenocarcinoma (MDA-MB-231) by B loaded HAp/ChOL. The obtained results of the DET and MTT tests were in agreement.
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  - Highly selective anticancer activity of core shell particles based on hydroxyapatite, chitosan lactate and different androstane derivatives
SP  - 50
EP  - 50
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7563
ER  - 

@conference{
editor = "Uskoković, Dragan, Radmilović, Velimir R.",
author = "Ignjatović, Nenad L. and Penov Gaši, Katarina and Ajduković, Jovana and Sakač, Marija and Kuzminac, Ivana and Kojić, Vesna V. and Marković, Smilja and Uskoković, Dragan",
year = "2017",
abstract = "Hybrid systems based on nano hydroxyapatites (HAp) are the subject of numerous studies in preventive and regenerative medicine. Special interests are directed towards the creation of a system based on HAp for use in a nano-oncology. The main objective of this research is directed towards the creation of a system with cytotoxic properties towards the cancer cells with the same time, minimum side effects. Carriers base on core shell of HAp/chitosan-poly(D,L)-lactide-coglycolide (PLGA) loaded with androstane-based cancer inhibitor could be seen as promising drug delivery platforms for selective cancer therapies.In this study we utilize an emulsification process and freeze drying to load the composite particles based on HAp nanocarrier, chitosane (Ch), PLGA and chitosan oligosaccharide lactate (ChOL) with 17β-hydroxy-17α-picolyl-androst-5-en-3β-acetate (A) and 3β,17β-dihydroxy-16-hydroxymino-androst-5-en (B), a chemotherapeutic derivatives of androstane. The picolyl androstane derivatives showed high potency in the cell inhibitors of hormone-dependent cancers (lung, prostate and colon cancer; adeno and cervix carcinoma; etc.).1H NMR, 13C NMR and high-resolution time-of-flight mass spectrometry (MS) techniques confirmed the intact structure of the derivatives A and B. The thermogravimetric and differential thermal analysis (TGA, DTA) coupled with mass spectrometry was used to qualitatively confirm the drug loading process. FT-IR, XRD, AFM and DSC techniques have confirmed the success of androstane (A and B) loading process in core shell particles base on nano hydroxyapatite. All the synthesized particles were found to be spherical in shape with a uniform size distribution from d50=167 to d50=231 nm. Highly selective anticancer activity was noted towards the human lung carcinoma (A549) by A loaded HAp/Ch-PLGA and towards the human breast adenocarcinoma (MDA-MB-231) by B loaded HAp/ChOL. The obtained results of the DET and MTT tests were in agreement.",
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 = "Highly selective anticancer activity of core shell particles based on hydroxyapatite, chitosan lactate and different androstane derivatives",
pages = "50-50",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7563"
}

Uskoković, D., Radmilović, V. R., Ignjatović, N. L., Penov Gaši, K., Ajduković, J., Sakač, M., Kuzminac, I., Kojić, V. V., Marković, S.,& Uskoković, D.. (2017). Highly selective anticancer activity of core shell particles based on hydroxyapatite, chitosan lactate and different androstane derivatives. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017
Belgrade : Materials Research Society of Serbia., 50-50.
https://hdl.handle.net/21.15107/rcub_vinar_7563

Uskoković D, Radmilović VR, Ignjatović NL, Penov Gaši K, Ajduković J, Sakač M, Kuzminac I, Kojić VV, Marković S, Uskoković D. Highly selective anticancer activity of core shell particles based on hydroxyapatite, chitosan lactate and different androstane derivatives. in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017. 2017;:50-50.
https://hdl.handle.net/21.15107/rcub_vinar_7563 .

Uskoković, Dragan, Radmilović, Velimir R., Ignjatović, Nenad L., Penov Gaši, Katarina, Ajduković, Jovana, Sakač, Marija, Kuzminac, Ivana, Kojić, Vesna V., Marković, Smilja, Uskoković, Dragan, "Highly selective anticancer activity of core shell particles based on hydroxyapatite, chitosan lactate and different androstane derivatives" in Programme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017 (2017):50-50,
https://hdl.handle.net/21.15107/rcub_vinar_7563 .

TY  - JOUR
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Cvjetićanin, Nikola
AU  - Jokić, Bojan M.
AU  - Umićević, Ana
AU  - Uskoković, Dragan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1401
AB  - Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6x10(-7) S cm(-1) to 2.3x10(-6) S cm(-1) and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mossbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.
T2  - Ceramics International
T1  - The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder
VL  - 43
IS  - 3
SP  - 3224
EP  - 3230
DO  - 10.1016/j.ceramint.2016.11.149
ER  - 

@article{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan M. and Umićević, Ana and Uskoković, Dragan",
year = "2017",
abstract = "Low intrinsic electronic conductivity is the main disadvantage of LiFePO4 when used as a cathode material in lithium ion batteries. The paper offers experimental proofs of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. The LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon free powders are synthesized and examined. The crystal structure refinements in the Pnma space group reveal that doping with fluorine ions preserves the olivine structure, while reducing both the lattice parameters and the antisite defect, and increasing the crystallite size. A small amount of incorporated fluorine enhances the electrical conductivity from 4.6x10(-7) S cm(-1) to 2.3x10(-6) S cm(-1) and has a positive impact on the electrochemical performance. Several spectroscopy techniques (Mossbauer, FTIR, and Raman) reveal differences between the two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.",
journal = "Ceramics International",
title = "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder",
volume = "43",
number = "3",
pages = "3224-3230",
doi = "10.1016/j.ceramint.2016.11.149"
}

Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B. M., Umićević, A.,& Uskoković, D.. (2017). The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International, 43(3), 3224-3230.
https://doi.org/10.1016/j.ceramint.2016.11.149

Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić BM, Umićević A, Uskoković D. The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder. in Ceramics International. 2017;43(3):3224-3230.
doi:10.1016/j.ceramint.2016.11.149 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan M., Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and electrical properties of the LiFePO4 powder" in Ceramics International, 43, no. 3 (2017):3224-3230,
https://doi.org/10.1016/j.ceramint.2016.11.149 . .

TY  - JOUR
AU  - Bratić, Milan
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Cvjetićanin, Nikola
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1585
AB  - Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20-60 V and subsequent annealing at 400 degrees C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9.10(-16) and 5.9.10(-15) cm(2) s(-1). (C) 2017 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology
VL  - 712
SP  - 90
EP  - 96
DO  - 10.1016/j.jallcom.2017.04.065
ER  - 

@article{
author = "Bratić, Milan and Jugović, Dragana and Mitrić, Miodrag and Cvjetićanin, Nikola",
year = "2017",
abstract = "Anatase TiO2 nanotube arrays of different morphology were prepared by a two-step process: anodic oxidation at voltages 20-60 V and subsequent annealing at 400 degrees C. By amplifying anodization voltage the inner diameter of nanotubes increased. At 60 V nanotubes changed the shape from cylindrical tube to truncated cone with elliptical opening. Electrochemical insertion of Li-ion in nanotubes was studied by cyclic voltammetry and galvanostatic charge-discharge experiments. The cyclovoltammetric response was fast for all nanotube arrays. The galvanostatic areal charge/discharge capacity of nanotube arrays increased with increasing anodizaton voltage. Although the mass of nanotubes prepared at 45 V was larger, the gravimetrical capacity was much higher for nanotubes prepared at 60 V because of the larger surface area exposed to the electrolyte. Gravimetrical capacity values exceed theoretical bulk capacity of anatase due to the surface storage of Li-ion. Diffusion coefficient of Li-ion was calculated to be between 5.9.10(-16) and 5.9.10(-15) cm(2) s(-1). (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology",
volume = "712",
pages = "90-96",
doi = "10.1016/j.jallcom.2017.04.065"
}

Bratić, M., Jugović, D., Mitrić, M.,& Cvjetićanin, N.. (2017). Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds, 712, 90-96.
https://doi.org/10.1016/j.jallcom.2017.04.065

Bratić M, Jugović D, Mitrić M, Cvjetićanin N. Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology. in Journal of Alloys and Compounds. 2017;712:90-96.
doi:10.1016/j.jallcom.2017.04.065 .

Bratić, Milan, Jugović, Dragana, Mitrić, Miodrag, Cvjetićanin, Nikola, "Insertion of lithium ion in anatase TiO2 nanotube arrays of different morphology" in Journal of Alloys and Compounds, 712 (2017):90-96,
https://doi.org/10.1016/j.jallcom.2017.04.065 . .

TY  - CONF
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
AU  - Milović, Miloš
AU  - Cvjetićanin, Nikola
AU  - Jokić, Bojan M.
AU  - Umićević, Ana
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/898
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7555
AB  - Low intrinsic electronic conductivity is the main weakness of LiFePO4 for the use as cathode material in lithium ion batteries. Here is presented an experimental proof of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. Crystal structure refinements in the space group Pnma reveal that doping with fluorine ions preserves olivine structure with the reduction of both the lattice parameters and the antisite defect, and an increase of a crystallite size. A small amount of incorporated fluorine enhances electrical conductivity from 4.6 × 10-7 Scm-1 to 2.3 × 10-6 Scm-1 and has positive impact on the electrochemical performances. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) disclose differences between two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
T1  - The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder
SP  - 35
EP  - 35
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7555
ER  - 

@conference{
author = "Jugović, Dragana and Mitrić, Miodrag and Milović, Miloš and Cvjetićanin, Nikola and Jokić, Bojan M. and Umićević, Ana and Uskoković, Dragan",
year = "2016",
abstract = "Low intrinsic electronic conductivity is the main weakness of LiFePO4 for the use as cathode material in lithium ion batteries. Here is presented an experimental proof of the theoretical prediction that fluorine doping of LiFePO4 can enhance its electrical conductivity. LiFePO4 and fluorine-doped LiFePO4 olivine type, carbon-free powders are synthesized and examined. Crystal structure refinements in the space group Pnma reveal that doping with fluorine ions preserves olivine structure with the reduction of both the lattice parameters and the antisite defect, and an increase of a crystallite size. A small amount of incorporated fluorine enhances electrical conductivity from 4.6 × 10-7 Scm-1 to 2.3 × 10-6 Scm-1 and has positive impact on the electrochemical performances. Several spectroscopy techniques (Mössbauer, FTIR, and Raman) disclose differences between two powders and additionally support the findings of both the Rietveld refinement and the conductivity measurements.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi",
title = "The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder",
pages = "35-35",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7555"
}

Jugović, D., Mitrić, M., Milović, M., Cvjetićanin, N., Jokić, B. M., Umićević, A.,& Uskoković, D.. (2016). The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
Belgrade : Materials Research Society of Serbia., 35-35.
https://hdl.handle.net/21.15107/rcub_vinar_7555

Jugović D, Mitrić M, Milović M, Cvjetićanin N, Jokić BM, Umićević A, Uskoković D. The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi. 2016;:35-35.
https://hdl.handle.net/21.15107/rcub_vinar_7555 .

Jugović, Dragana, Mitrić, Miodrag, Milović, Miloš, Cvjetićanin, Nikola, Jokić, Bojan M., Umićević, Ana, Uskoković, Dragan, "The influence of fluorine doping on the structural and the electrical properties of LiFePO4 powder" in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi (2016):35-35,
https://hdl.handle.net/21.15107/rcub_vinar_7555 .

TY  - JOUR
AU  - Marković, Smilja
AU  - Rajić, Vladimir
AU  - Stanković, Ana
AU  - Veselinović, Ljiljana M.
AU  - Belošević-Čavor, Jelena
AU  - Batalović, Katarina
AU  - Abazović, Nadica
AU  - Škapin, Srečo Davor
AU  - Uskoković, Dragan
PY  - 2016
UR  - https://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.
PB  - Elsevier
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 = "Marković, Smilja and Rajić, Vladimir and Stanković, Ana and Veselinović, Ljiljana M. and Belošević-Čavor, Jelena and Batalović, Katarina and Abazović, Nadica and Škapin, Srečo Davor and Uskoković, Dragan",
year = "2016",
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.",
publisher = "Elsevier",
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"
}

Marković, S., Rajić, V., Stanković, A., Veselinović, L. M., 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. in Solar Energy
Elsevier., 127, 124-135.
https://doi.org/10.1016/j.solener.2016.01.026

Marković S, Rajić V, Stanković A, Veselinović LM, 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. in Solar Energy. 2016;127:124-135.
doi:10.1016/j.solener.2016.01.026 .

Marković, Smilja, Rajić, Vladimir, Stanković, Ana, Veselinović, Ljiljana M., 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" in Solar Energy, 127 (2016):124-135,
https://doi.org/10.1016/j.solener.2016.01.026 . .

TY  - CONF
AU  - Jugović, Dragana
AU  - Mitrić, Miodrag
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7547
AB  - Lithium-ion batteries are under intense scrutiny as alternative energy/power sources. Their electrochemistry is based on intercalation/deintercalation reactions of lithium ions within a crystal structure of an electrode material. Therefore, the structure itself determines both the electrode operating voltage and the transport pathways for lithium ions. Some oxide- and polyanion-based materials are synthesized and studied as positive electrodes. Several synthetic routes were investigated. The crystal structure refinement of an X-ray powder diffraction data was based on the Rietveld full profile method. All relevant structural and microstructural crystal parameters that could be significant for electrochemical intercalation/deintercalation processes were determined. Structural analysis revealed different dimensionality of lithium ion motion. It was also shown that the structural and microstructural properties are significantly dependent on the synthesis condition.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade
T1  - Synthesis and structural characterization of some cathode materials for lithium-ion batteries
SP  - 46
EP  - 46
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7547
ER  - 

@conference{
author = "Jugović, Dragana and Mitrić, Miodrag",
year = "2016",
abstract = "Lithium-ion batteries are under intense scrutiny as alternative energy/power sources. Their electrochemistry is based on intercalation/deintercalation reactions of lithium ions within a crystal structure of an electrode material. Therefore, the structure itself determines both the electrode operating voltage and the transport pathways for lithium ions. Some oxide- and polyanion-based materials are synthesized and studied as positive electrodes. Several synthetic routes were investigated. The crystal structure refinement of an X-ray powder diffraction data was based on the Rietveld full profile method. All relevant structural and microstructural crystal parameters that could be significant for electrochemical intercalation/deintercalation processes were determined. Structural analysis revealed different dimensionality of lithium ion motion. It was also shown that the structural and microstructural properties are significantly dependent on the synthesis condition.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade",
title = "Synthesis and structural characterization of some cathode materials for lithium-ion batteries",
pages = "46-46",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7547"
}

Jugović, D.,& Mitrić, M.. (2016). Synthesis and structural characterization of some cathode materials for lithium-ion batteries. in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade
Belgrade : Serbian Ceramic Society., 46-46.
https://hdl.handle.net/21.15107/rcub_vinar_7547

Jugović D, Mitrić M. Synthesis and structural characterization of some cathode materials for lithium-ion batteries. in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade. 2016;:46-46.
https://hdl.handle.net/21.15107/rcub_vinar_7547 .

Jugović, Dragana, Mitrić, Miodrag, "Synthesis and structural characterization of some cathode materials for lithium-ion batteries" in Advanced Ceramics and Application : 5th Serbian Ceramic Society Conference : program and the book of abstracts; September 21-23, 2016; Belgrade (2016):46-46,
https://hdl.handle.net/21.15107/rcub_vinar_7547 .

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  - https://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",
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. in 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. in Materials Science and Engineering: C. 2016;68:746-757.
doi:10.1016/j.msec.2016.06.047 .

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" in Materials Science and Engineering: C, 68 (2016):746-757,
https://doi.org/10.1016/j.msec.2016.06.047 . .

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  - https://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",
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. in 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. in Materials Science and Engineering: C. 2016;68:746-757.
doi:10.1016/j.msec.2016.06.047 .

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" in Materials Science and Engineering: C, 68 (2016):746-757,
https://doi.org/10.1016/j.msec.2016.06.047 . .

TY  - CONF
AU  - Ignjatović, Nenad L.
AU  - Penov Gaši, Katarina
AU  - Wu, Victoria
AU  - Ajduković, Jovana
AU  - Kojić, Vesna V.
AU  - Vasiljević-Radović, Dana
AU  - Uskoković, Vuk
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/896
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7553
AB  - The applicative potential of synthetic calcium phosphates, especially hydroxyapatite (HAp), has become intensely broadened in the past 10 years, from bone tissue engineering to multiple other fields of biomedicine. Previously we have shown that hydroxyapatite nanoparticles coated with chitosan-poly(D,L)-lactide-co-glycolide (HAp/Ch-PLGA) target lungs following their intravenous administration into mice. For this purpose radioactive 125-Iodine (125I), a low energy gamma emitter, was used to develop a novel in situ method for radiolabeling of particles and investigation of their biodistribution. In this study we utilize an emulsification process and freeze drying to load the composite particles based on hydroxyapatite nanocarrier, chitosane and poly(lactic-co-glycolic acid) with 17β- hydroxy-17α-picolyl-androst-5-en-3β-acetate (A), a chemotherapeutic derivative of androstane. The picolyl androstane derivatives showed high potency in the cell inhibitors of hormonedependent cancers (adenocarcinoma, prostate cancer, cervix carcinoma, colon cancer, etc.). 1H NMR, 13C NMR and high-resolution time-of-flight mass spectrometry (MS) techniques confirmed the intact structure of the derivative A following its entrapment within HAp/Ch-PLGA particles. The synthesized particles of A-loaded HAp/Ch-PLGA were found to be spherical in shape with a uniform size distribution of d50=168 nm. The release of A from HAp/Ch-PLGA was sustained, with no burst release or plateauing after three weeks. The obtained results of the DET and MTT tests show that the particles of A-loaded HAp/Ch-PLGA exhibit almost three times higher cytotoxicity towards lung adenocarcinoma cells (A549) than towards healthy cells (MRC5), while at the same time allowing twice as fast recovery of healthy cells. We have also analyzed the period of recovery of healthy, as well as cancer cells, following the treatment with A-loaded HAp/Ch-PLGA. After treatment with A-loaded HAp/Ch-PLGA, healthy cells recover twice as fast as the malignant ones. Immunofluorescent staining of primary fibroblasts interacting with HAp/Ch-PLGA and A-HAp/Ch-PLGA particles demonstrates no negative morphological or proliferative effects on cells.
PB  - Belgrade : Materials Research Society of Serbia
C3  - YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
T1  - Tumor-selective hybrid system based on hydroxyapatite nanocarrier, chitosan, poly(lactic-co-glycolic acid) and androstan derivate
SP  - 27
EP  - 27
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7553
ER  - 

@conference{
author = "Ignjatović, Nenad L. and Penov Gaši, Katarina and Wu, Victoria and Ajduković, Jovana and Kojić, Vesna V. and Vasiljević-Radović, Dana and Uskoković, Vuk and Uskoković, Dragan",
year = "2016",
abstract = "The applicative potential of synthetic calcium phosphates, especially hydroxyapatite (HAp), has become intensely broadened in the past 10 years, from bone tissue engineering to multiple other fields of biomedicine. Previously we have shown that hydroxyapatite nanoparticles coated with chitosan-poly(D,L)-lactide-co-glycolide (HAp/Ch-PLGA) target lungs following their intravenous administration into mice. For this purpose radioactive 125-Iodine (125I), a low energy gamma emitter, was used to develop a novel in situ method for radiolabeling of particles and investigation of their biodistribution. In this study we utilize an emulsification process and freeze drying to load the composite particles based on hydroxyapatite nanocarrier, chitosane and poly(lactic-co-glycolic acid) with 17β- hydroxy-17α-picolyl-androst-5-en-3β-acetate (A), a chemotherapeutic derivative of androstane. The picolyl androstane derivatives showed high potency in the cell inhibitors of hormonedependent cancers (adenocarcinoma, prostate cancer, cervix carcinoma, colon cancer, etc.). 1H NMR, 13C NMR and high-resolution time-of-flight mass spectrometry (MS) techniques confirmed the intact structure of the derivative A following its entrapment within HAp/Ch-PLGA particles. The synthesized particles of A-loaded HAp/Ch-PLGA were found to be spherical in shape with a uniform size distribution of d50=168 nm. The release of A from HAp/Ch-PLGA was sustained, with no burst release or plateauing after three weeks. The obtained results of the DET and MTT tests show that the particles of A-loaded HAp/Ch-PLGA exhibit almost three times higher cytotoxicity towards lung adenocarcinoma cells (A549) than towards healthy cells (MRC5), while at the same time allowing twice as fast recovery of healthy cells. We have also analyzed the period of recovery of healthy, as well as cancer cells, following the treatment with A-loaded HAp/Ch-PLGA. After treatment with A-loaded HAp/Ch-PLGA, healthy cells recover twice as fast as the malignant ones. Immunofluorescent staining of primary fibroblasts interacting with HAp/Ch-PLGA and A-HAp/Ch-PLGA particles demonstrates no negative morphological or proliferative effects on cells.",
publisher = "Belgrade : Materials Research Society of Serbia",
journal = "YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi",
title = "Tumor-selective hybrid system based on hydroxyapatite nanocarrier, chitosan, poly(lactic-co-glycolic acid) and androstan derivate",
pages = "27-27",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7553"
}

Ignjatović, N. L., Penov Gaši, K., Wu, V., Ajduković, J., Kojić, V. V., Vasiljević-Radović, D., Uskoković, V.,& Uskoković, D.. (2016). Tumor-selective hybrid system based on hydroxyapatite nanocarrier, chitosan, poly(lactic-co-glycolic acid) and androstan derivate. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi
Belgrade : Materials Research Society of Serbia., 27-27.
https://hdl.handle.net/21.15107/rcub_vinar_7553

Ignjatović NL, Penov Gaši K, Wu V, Ajduković J, Kojić VV, Vasiljević-Radović D, Uskoković V, Uskoković D. Tumor-selective hybrid system based on hydroxyapatite nanocarrier, chitosan, poly(lactic-co-glycolic acid) and androstan derivate. in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi. 2016;:27-27.
https://hdl.handle.net/21.15107/rcub_vinar_7553 .

Ignjatović, Nenad L., Penov Gaši, Katarina, Wu, Victoria, Ajduković, Jovana, Kojić, Vesna V., Vasiljević-Radović, Dana, Uskoković, Vuk, Uskoković, Dragan, "Tumor-selective hybrid system based on hydroxyapatite nanocarrier, chitosan, poly(lactic-co-glycolic acid) and androstan derivate" in YUCOMAT 2016 : 18th Annual Conference YUCOMAT 2016 : programme and the book of abstracts; September 5-10, Herceg Novi (2016):27-27,
https://hdl.handle.net/21.15107/rcub_vinar_7553 .

TY  - JOUR
AU  - Veselinović, Ljiljana M.
AU  - Mitrić, Miodrag
AU  - Avdeev, Maxim
AU  - Marković, Smilja
AU  - Uskoković, Dragan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1312
AB  - Neutron powder diffraction (NPD) was employed to further investigate the BaTi1-xSnxO3 (BTS) system previously studied by X-ray diffraction. The room-temperature phase compositions and crystal structures of BTS samples with x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20 were refined by the Rietveld method using NPD data. It is well known that barium titanate powder (x = 0) crystallizes in the tetragonal P4mm space group. The crystal structures of the samples with 0.025 LT = x LT = 0.07 were refined as mixtures of P4mm and Amm2 phases; those with x = 0.1 and 0.12 show the coexistence of rhombohedral R3m and cubic phases, while the samples with x = 0.15 and 0.20 crystallize in a single cubic Pm (3) over barm phase. Temperature-dependent NPD was used to characterize the BaTi0.95Sn0.05O3 sample at 273, 333 and 373 K, and it was found to form single-phase Amm2, P4mm and Pm (3) over barm structures at these respective temperatures. The NPD results are in agreement with data obtained by differential scanning calorimetry and dielectric permittivity measurements, which show a para-electric-ferroelectric transition (associated with structural transition) from Pm (3) over barm to P4mm at about 353 K followed by a P4mm to Amm2 phase transition at about 303 K.
T2  - Journal of Applied Crystallography
T1  - New insights into BaTi1-xSnxO3 (0 LT = x LT = 0.20) phase diagram from neutron diffraction data
VL  - 49
SP  - 1726
EP  - 1733
DO  - 10.1107/S1600576716013157
ER  - 

@article{
author = "Veselinović, Ljiljana M. and Mitrić, Miodrag and Avdeev, Maxim and Marković, Smilja and Uskoković, Dragan",
year = "2016",
abstract = "Neutron powder diffraction (NPD) was employed to further investigate the BaTi1-xSnxO3 (BTS) system previously studied by X-ray diffraction. The room-temperature phase compositions and crystal structures of BTS samples with x = 0, 0.025, 0.05, 0.07, 0.10, 0.12, 0.15 and 0.20 were refined by the Rietveld method using NPD data. It is well known that barium titanate powder (x = 0) crystallizes in the tetragonal P4mm space group. The crystal structures of the samples with 0.025 LT = x LT = 0.07 were refined as mixtures of P4mm and Amm2 phases; those with x = 0.1 and 0.12 show the coexistence of rhombohedral R3m and cubic phases, while the samples with x = 0.15 and 0.20 crystallize in a single cubic Pm (3) over barm phase. Temperature-dependent NPD was used to characterize the BaTi0.95Sn0.05O3 sample at 273, 333 and 373 K, and it was found to form single-phase Amm2, P4mm and Pm (3) over barm structures at these respective temperatures. The NPD results are in agreement with data obtained by differential scanning calorimetry and dielectric permittivity measurements, which show a para-electric-ferroelectric transition (associated with structural transition) from Pm (3) over barm to P4mm at about 353 K followed by a P4mm to Amm2 phase transition at about 303 K.",
journal = "Journal of Applied Crystallography",
title = "New insights into BaTi1-xSnxO3 (0 LT = x LT = 0.20) phase diagram from neutron diffraction data",
volume = "49",
pages = "1726-1733",
doi = "10.1107/S1600576716013157"
}

Veselinović, L. M., Mitrić, M., Avdeev, M., Marković, S.,& Uskoković, D.. (2016). New insights into BaTi1-xSnxO3 (0 LT = x LT = 0.20) phase diagram from neutron diffraction data. in Journal of Applied Crystallography, 49, 1726-1733.
https://doi.org/10.1107/S1600576716013157

Veselinović LM, Mitrić M, Avdeev M, Marković S, Uskoković D. New insights into BaTi1-xSnxO3 (0 LT = x LT = 0.20) phase diagram from neutron diffraction data. in Journal of Applied Crystallography. 2016;49:1726-1733.
doi:10.1107/S1600576716013157 .

Veselinović, Ljiljana M., Mitrić, Miodrag, Avdeev, Maxim, Marković, Smilja, Uskoković, Dragan, "New insights into BaTi1-xSnxO3 (0 LT = x LT = 0.20) phase diagram from neutron diffraction data" in Journal of Applied Crystallography, 49 (2016):1726-1733,
https://doi.org/10.1107/S1600576716013157 . .

TY  - JOUR
AU  - Ignjatović, Nenad L.
AU  - Penov-Gaši, Katarina
AU  - Wu, Victoria
AU  - Ajduković, Jovana
AU  - Kojić, Vesna V.
AU  - Vasiljević-Radović, Dana
AU  - Kuzmanović, Maja D.
AU  - Uskoković, Vuk
AU  - Uskoković, Dragan
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/15974
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7569
AB  - In an earlier study we demonstrated that hydroxyapatite nanoparticles coated with chitosan-poly(d,l)-lactide-co-glycolide (HAp/Ch-PLGA) target lungs following their intravenous injection into mice. In this study we utilize an emulsification process and freeze drying to load the composite HAp/Ch-PLGA particles with 17β-hydroxy-17α-picolyl-androst-5-en-3β-yl-acetate (A), a chemotherapeutic derivative of androstane and a novel compound with a selective anticancer activity against lung cancer cells. 1H NMR and 13C NMR techniques confirmed the intact structure of the derivative A following its entrapment within HAp/Ch-PLGA particles. The thermogravimetric and differential thermal analyses coupled with mass spectrometry were used to assess the thermal degradation products and properties of A-loaded HAp/Ch-PLGA. The loading efficiency, as indicated by the comparison of enthalpies of phase transitions in pure A and A-loaded HAp/Ch-PLGA, equaled 7.47wt.%. The release of A from HAp/Ch-PLGA was sustained, neither exhibiting a burst release nor plateauing after three weeks. Atomic force microscopy and particle size distribution analyses were used to confirm that the particles were spherical with a uniform size distribution of d50=168nm. In vitro cytotoxicity testing of A-loaded HAp/Ch-PLGA using MTT and trypan blue dye exclusion assays demonstrated that the particles were cytotoxic to the A549 human lung carcinoma cell line (46±2%), while simultaneously preserving high viability (83±3%) of regular MRC5 human lung fibroblasts and causing no harm to primary mouse lung fibroblasts. In conclusion, composite A-loaded HAp/Ch-PLGA particles could be seen as promising drug delivery platforms for selective cancer therapies, targeting malignant cells for destruction, while having a significantly lesser cytotoxic effect on the healthy cells.
PB  - Elsevier
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor
VL  - 148
SP  - 629
EP  - 639
DO  - 10.1016/j.colsurfb.2016.09.041
ER  - 

@article{
author = "Ignjatović, Nenad L. and Penov-Gaši, Katarina and Wu, Victoria and Ajduković, Jovana and Kojić, Vesna V. and Vasiljević-Radović, Dana and Kuzmanović, Maja D. and Uskoković, Vuk and Uskoković, Dragan",
year = "2016",
abstract = "In an earlier study we demonstrated that hydroxyapatite nanoparticles coated with chitosan-poly(d,l)-lactide-co-glycolide (HAp/Ch-PLGA) target lungs following their intravenous injection into mice. In this study we utilize an emulsification process and freeze drying to load the composite HAp/Ch-PLGA particles with 17β-hydroxy-17α-picolyl-androst-5-en-3β-yl-acetate (A), a chemotherapeutic derivative of androstane and a novel compound with a selective anticancer activity against lung cancer cells. 1H NMR and 13C NMR techniques confirmed the intact structure of the derivative A following its entrapment within HAp/Ch-PLGA particles. The thermogravimetric and differential thermal analyses coupled with mass spectrometry were used to assess the thermal degradation products and properties of A-loaded HAp/Ch-PLGA. The loading efficiency, as indicated by the comparison of enthalpies of phase transitions in pure A and A-loaded HAp/Ch-PLGA, equaled 7.47wt.%. The release of A from HAp/Ch-PLGA was sustained, neither exhibiting a burst release nor plateauing after three weeks. Atomic force microscopy and particle size distribution analyses were used to confirm that the particles were spherical with a uniform size distribution of d50=168nm. In vitro cytotoxicity testing of A-loaded HAp/Ch-PLGA using MTT and trypan blue dye exclusion assays demonstrated that the particles were cytotoxic to the A549 human lung carcinoma cell line (46±2%), while simultaneously preserving high viability (83±3%) of regular MRC5 human lung fibroblasts and causing no harm to primary mouse lung fibroblasts. In conclusion, composite A-loaded HAp/Ch-PLGA particles could be seen as promising drug delivery platforms for selective cancer therapies, targeting malignant cells for destruction, while having a significantly lesser cytotoxic effect on the healthy cells.",
publisher = "Elsevier",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor",
volume = "148",
pages = "629-639",
doi = "10.1016/j.colsurfb.2016.09.041"
}

Ignjatović, N. L., Penov-Gaši, K., Wu, V., Ajduković, J., Kojić, V. V., Vasiljević-Radović, D., Kuzmanović, M. D., Uskoković, V.,& Uskoković, D.. (2016). Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor. in Colloids and Surfaces. B: Biointerfaces
Elsevier., 148, 629-639.
https://doi.org/10.1016/j.colsurfb.2016.09.041

Ignjatović NL, Penov-Gaši K, Wu V, Ajduković J, Kojić VV, Vasiljević-Radović D, Kuzmanović MD, Uskoković V, Uskoković D. Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor. in Colloids and Surfaces. B: Biointerfaces. 2016;148:629-639.
doi:10.1016/j.colsurfb.2016.09.041 .

Ignjatović, Nenad L., Penov-Gaši, Katarina, Wu, Victoria, Ajduković, Jovana, Kojić, Vesna V., Vasiljević-Radović, Dana, Kuzmanović, Maja D., Uskoković, Vuk, Uskoković, Dragan, "Selective anticancer activity of hydroxyapatite/chitosan-poly(d,l)-lactide-co-glycolide particles loaded with an androstane-based cancer inhibitor" in Colloids and Surfaces. B: Biointerfaces, 148 (2016):629-639,
https://doi.org/10.1016/j.colsurfb.2016.09.041 . .