Krsmanović, Radenka

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orcid::0000-0001-7136-3384
  • Krsmanović, Radenka (37)
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Author's Bibliography

Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics

Krsmanović, Radenka; Bregiroux, Damien; Viana, Bruno

(2017)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Bregiroux, Damien
AU  - Viana, Bruno
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1787
AB  - Dense yttria ceramics were prepared by Spark Plasma Sintering of a nanopowder synthesized using a PEG assisted combustion method. Densification occurs between 800 degrees C and 900 degrees C without any additive. This corresponds to one of the lowest sintering temperature found in the literature for Y2O3. Because of a significant release of organic species, the Y2O3 precursors obtained by this synthesis route contains macropores that have a negative impact on the final microstructure. We show that the emergence of these macropores can be minimized by decreasing the annealing temperature used for the precursor powder (in a temperature range of 300-650 degrees C) as opposed to the usual 800 degrees C. Finally, a precursor annealed at 650 degrees C allows us to obtain fully dense ceramics, with a very fine and homogeneous microstructure (and a grain size around 300 nm). Vickers microhardness and fracture toughness were measured and discussed in relation to the microstructure of the ceramics.
T2  - Ceramics International
T1  - Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics
VL  - 43
IS  - 17
SP  - 15834
EP  - 15841
DO  - 10.1016/j.ceramint.2017.08.153
ER  - 
@article{
author = "Krsmanović, Radenka and Bregiroux, Damien and Viana, Bruno",
year = "2017",
abstract = "Dense yttria ceramics were prepared by Spark Plasma Sintering of a nanopowder synthesized using a PEG assisted combustion method. Densification occurs between 800 degrees C and 900 degrees C without any additive. This corresponds to one of the lowest sintering temperature found in the literature for Y2O3. Because of a significant release of organic species, the Y2O3 precursors obtained by this synthesis route contains macropores that have a negative impact on the final microstructure. We show that the emergence of these macropores can be minimized by decreasing the annealing temperature used for the precursor powder (in a temperature range of 300-650 degrees C) as opposed to the usual 800 degrees C. Finally, a precursor annealed at 650 degrees C allows us to obtain fully dense ceramics, with a very fine and homogeneous microstructure (and a grain size around 300 nm). Vickers microhardness and fracture toughness were measured and discussed in relation to the microstructure of the ceramics.",
journal = "Ceramics International",
title = "Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics",
volume = "43",
number = "17",
pages = "15834-15841",
doi = "10.1016/j.ceramint.2017.08.153"
}
Krsmanović, R., Bregiroux, D.,& Viana, B.. (2017). Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics. in Ceramics International, 43(17), 15834-15841.
https://doi.org/10.1016/j.ceramint.2017.08.153
Krsmanović R, Bregiroux D, Viana B. Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics. in Ceramics International. 2017;43(17):15834-15841.
doi:10.1016/j.ceramint.2017.08.153 .
Krsmanović, Radenka, Bregiroux, Damien, Viana, Bruno, "Nanostructured Y2O3 ceramics elaborated by Spark Plasma Sintering of nanopowder synthesized by PEG assisted combustion method: The influence of precursor morphological characteristics" in Ceramics International, 43, no. 17 (2017):15834-15841,
https://doi.org/10.1016/j.ceramint.2017.08.153 . .
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Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route

Krsmanović, Radenka; Jovanović, Dragana J.; Antić, Željka; Bartova, Barbora; Milivojević, Dušan; Dramićanin, Miroslav; Brik, Mikhail G.

(2014)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Jovanović, Dragana J.
AU  - Antić, Željka
AU  - Bartova, Barbora
AU  - Milivojević, Dušan
AU  - Dramićanin, Miroslav
AU  - Brik, Mikhail G.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5847
AB  - Zinc sulfide, both as a bulk material and in nanocrystalline form, is a valuable luminescent material with important applications. Doped ZnS nanoparticles of around 5 nm are the material of choice for optoelectronic applications running in the UV region owing to their significant quantum size effect. This paper concerns detailed structural, spectroscopic and crystal field studies of ZnS nanoparticles, both pure and doped with Mn2+ ions, successfully synthesized at room temperature using a simple reverse micelle technique in the Triton X-100/cyclohexane medium. The resulting ZnS sphalerite phase smallsize nanoparticles (3-5 nm) have a much larger energy band gap ( similar to 4.7 eV) than that reported for the bulk ZnS (3.6 eV), thus confirming a pronounced quantum confinement effect. The electron paramagnetic resonance data provided evidence for the existence of two distinct environments for Mn2+ ions: the interior (core) and near the surface of the nanoparticles. The presence of an Mn2+-characteristic orange emission centered at 600 nm confirmed that our samples were properly doped with Mn2+ ions, as the T-4(1)- GT (6)A(1) radiation transition could arise only on the basis of Mn2+ ions incorporated into the ZnS nanoparticles. To the best of our knowledge, our finding include the longest decay time component for the orange emission ever observed, timed at about 3.3 ms. The experimental excitation spectra were analyzed and the transitions assigned using the exchange charge model of theory of crystal field, which allowed to calculate the energy level scheme of the Mn2+ ions. The results presented in this paper provide us with detailed information about the ZnS sphalerite nanocrystals studied and can be readily applied to other similar systems. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Journal of Luminescence
T1  - Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route
VL  - 146
SP  - 133
EP  - 140
DO  - 10.1016/j.jlumin.2013.09.032
ER  - 
@article{
author = "Krsmanović, Radenka and Jovanović, Dragana J. and Antić, Željka and Bartova, Barbora and Milivojević, Dušan and Dramićanin, Miroslav and Brik, Mikhail G.",
year = "2014",
abstract = "Zinc sulfide, both as a bulk material and in nanocrystalline form, is a valuable luminescent material with important applications. Doped ZnS nanoparticles of around 5 nm are the material of choice for optoelectronic applications running in the UV region owing to their significant quantum size effect. This paper concerns detailed structural, spectroscopic and crystal field studies of ZnS nanoparticles, both pure and doped with Mn2+ ions, successfully synthesized at room temperature using a simple reverse micelle technique in the Triton X-100/cyclohexane medium. The resulting ZnS sphalerite phase smallsize nanoparticles (3-5 nm) have a much larger energy band gap ( similar to 4.7 eV) than that reported for the bulk ZnS (3.6 eV), thus confirming a pronounced quantum confinement effect. The electron paramagnetic resonance data provided evidence for the existence of two distinct environments for Mn2+ ions: the interior (core) and near the surface of the nanoparticles. The presence of an Mn2+-characteristic orange emission centered at 600 nm confirmed that our samples were properly doped with Mn2+ ions, as the T-4(1)- GT (6)A(1) radiation transition could arise only on the basis of Mn2+ ions incorporated into the ZnS nanoparticles. To the best of our knowledge, our finding include the longest decay time component for the orange emission ever observed, timed at about 3.3 ms. The experimental excitation spectra were analyzed and the transitions assigned using the exchange charge model of theory of crystal field, which allowed to calculate the energy level scheme of the Mn2+ ions. The results presented in this paper provide us with detailed information about the ZnS sphalerite nanocrystals studied and can be readily applied to other similar systems. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Journal of Luminescence",
title = "Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route",
volume = "146",
pages = "133-140",
doi = "10.1016/j.jlumin.2013.09.032"
}
Krsmanović, R., Jovanović, D. J., Antić, Ž., Bartova, B., Milivojević, D., Dramićanin, M.,& Brik, M. G.. (2014). Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route. in Journal of Luminescence, 146, 133-140.
https://doi.org/10.1016/j.jlumin.2013.09.032
Krsmanović R, Jovanović DJ, Antić Ž, Bartova B, Milivojević D, Dramićanin M, Brik MG. Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route. in Journal of Luminescence. 2014;146:133-140.
doi:10.1016/j.jlumin.2013.09.032 .
Krsmanović, Radenka, Jovanović, Dragana J., Antić, Željka, Bartova, Barbora, Milivojević, Dušan, Dramićanin, Miroslav, Brik, Mikhail G., "Structural, optical and crystal field analyses of undoped and Mn2+-doped ZnS nanoparticles synthesized via reverse micelle route" in Journal of Luminescence, 146 (2014):133-140,
https://doi.org/10.1016/j.jlumin.2013.09.032 . .
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61

ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties

Trandafilović, Lidija V.; Krsmanović, Radenka; Dimitrijević-Branković, Suzana I.; Stoiljković, Milovan; Luyt, Adriaan S.; Đoković, Vladimir

(2014)

TY  - JOUR
AU  - Trandafilović, Lidija V.
AU  - Krsmanović, Radenka
AU  - Dimitrijević-Branković, Suzana I.
AU  - Stoiljković, Milovan
AU  - Luyt, Adriaan S.
AU  - Đoković, Vladimir
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/73
AB  - A procedure for the preparation of ZnO nanocubes in an alginate biopolymer was introduced. The obtained nanocubes were used for the preparation of ZnO/Ag heterostructures. High resolution scanning electron microscopy showed that reduction of silver salts in the presence of nanocubes results in the formation of spherical silver nanoparticles at their edges and vertices. UV-vis and photoluminescence spectroscopy revealed that alginate-ZnO/Ag nanostructures exhibit different optical properties compared to the starting alginate-ZnO system. The surface plasmon resonance peak of the silver nanoparticles dominates the absorption spectra of the ZnO/Ag hybrid particles, while at the same time the Ag nanoparticles quench the ZnO emission. The photocatalytic activity of the ZnO/Ag heterostructure was faster than that of the pure ZnO and further improved with increasing the concentration of silver. Both the alginate-ZnO and alginate-ZnO/Ag nanocomposites showed strong antimicrobial activities against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties
VL  - 253
SP  - 341
EP  - 349
DO  - 10.1016/j.cej.2014.05.056
ER  - 
@article{
author = "Trandafilović, Lidija V. and Krsmanović, Radenka and Dimitrijević-Branković, Suzana I. and Stoiljković, Milovan and Luyt, Adriaan S. and Đoković, Vladimir",
year = "2014",
abstract = "A procedure for the preparation of ZnO nanocubes in an alginate biopolymer was introduced. The obtained nanocubes were used for the preparation of ZnO/Ag heterostructures. High resolution scanning electron microscopy showed that reduction of silver salts in the presence of nanocubes results in the formation of spherical silver nanoparticles at their edges and vertices. UV-vis and photoluminescence spectroscopy revealed that alginate-ZnO/Ag nanostructures exhibit different optical properties compared to the starting alginate-ZnO system. The surface plasmon resonance peak of the silver nanoparticles dominates the absorption spectra of the ZnO/Ag hybrid particles, while at the same time the Ag nanoparticles quench the ZnO emission. The photocatalytic activity of the ZnO/Ag heterostructure was faster than that of the pure ZnO and further improved with increasing the concentration of silver. Both the alginate-ZnO and alginate-ZnO/Ag nanocomposites showed strong antimicrobial activities against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties",
volume = "253",
pages = "341-349",
doi = "10.1016/j.cej.2014.05.056"
}
Trandafilović, L. V., Krsmanović, R., Dimitrijević-Branković, S. I., Stoiljković, M., Luyt, A. S.,& Đoković, V.. (2014). ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties. in Chemical Engineering Journal, 253, 341-349.
https://doi.org/10.1016/j.cej.2014.05.056
Trandafilović LV, Krsmanović R, Dimitrijević-Branković SI, Stoiljković M, Luyt AS, Đoković V. ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties. in Chemical Engineering Journal. 2014;253:341-349.
doi:10.1016/j.cej.2014.05.056 .
Trandafilović, Lidija V., Krsmanović, Radenka, Dimitrijević-Branković, Suzana I., Stoiljković, Milovan, Luyt, Adriaan S., Đoković, Vladimir, "ZnO/Ag hybrid nanocubes in alginate biopolymer: Synthesis and properties" in Chemical Engineering Journal, 253 (2014):341-349,
https://doi.org/10.1016/j.cej.2014.05.056 . .
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Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development

Krsmanović, Radenka; Antić, Željka; Milićević, Bojana R.; Pošarac-Marković, Milica B.; Janaćković, Đorđe T.; Dramićanin, Miroslav; Brik, Mikhail G.; Steins, Ints; Veljović, Đorđe N.

(2014)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Milićević, Bojana R.
AU  - Pošarac-Marković, Milica B.
AU  - Janaćković, Đorđe T.
AU  - Dramićanin, Miroslav
AU  - Brik, Mikhail G.
AU  - Steins, Ints
AU  - Veljović, Đorđe N.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5972
AB  - Using Spark Plasma Sintering it is possible to produce polycrystalline ceramics of very fine microstructure and good mechanical properties. This work presents the fabrication of such ceramics using Eu3+-doped (Y0.7Gd0.3)(2)O-3 nanopowder as a starting material. We monitored the changes in the morphology of ceramic samples and their consolidation with additional thermal treatments at 650 degrees C and 1100 degrees C. The ceramics grain size remained in the sub-micron domain, even when elevated temperatures were used for annealing. The best results were obtained for the sample sintered at 1100 degrees C for 20 min, which had the smallest grain size, theoretical density, and the most intensive photoluminescence, along with the maximum hardness and appropriate fracture toughness. The Judd-Ofelt intensity parameters and branching ratios were calculated, taking into account the difference in the effective refractive index for the nanopowder and ceramic samples. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development
VL  - 40
IS  - 6
SP  - 8853
EP  - 8862
DO  - 10.1016/j.ceramint.2014.01.108
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Milićević, Bojana R. and Pošarac-Marković, Milica B. and Janaćković, Đorđe T. and Dramićanin, Miroslav and Brik, Mikhail G. and Steins, Ints and Veljović, Đorđe N.",
year = "2014",
abstract = "Using Spark Plasma Sintering it is possible to produce polycrystalline ceramics of very fine microstructure and good mechanical properties. This work presents the fabrication of such ceramics using Eu3+-doped (Y0.7Gd0.3)(2)O-3 nanopowder as a starting material. We monitored the changes in the morphology of ceramic samples and their consolidation with additional thermal treatments at 650 degrees C and 1100 degrees C. The ceramics grain size remained in the sub-micron domain, even when elevated temperatures were used for annealing. The best results were obtained for the sample sintered at 1100 degrees C for 20 min, which had the smallest grain size, theoretical density, and the most intensive photoluminescence, along with the maximum hardness and appropriate fracture toughness. The Judd-Ofelt intensity parameters and branching ratios were calculated, taking into account the difference in the effective refractive index for the nanopowder and ceramic samples. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development",
volume = "40",
number = "6",
pages = "8853-8862",
doi = "10.1016/j.ceramint.2014.01.108"
}
Krsmanović, R., Antić, Ž., Milićević, B. R., Pošarac-Marković, M. B., Janaćković, Đ. T., Dramićanin, M., Brik, M. G., Steins, I.,& Veljović, Đ. N.. (2014). Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development. in Ceramics International, 40(6), 8853-8862.
https://doi.org/10.1016/j.ceramint.2014.01.108
Krsmanović R, Antić Ž, Milićević BR, Pošarac-Marković MB, Janaćković ĐT, Dramićanin M, Brik MG, Steins I, Veljović ĐN. Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development. in Ceramics International. 2014;40(6):8853-8862.
doi:10.1016/j.ceramint.2014.01.108 .
Krsmanović, Radenka, Antić, Željka, Milićević, Bojana R., Pošarac-Marković, Milica B., Janaćković, Đorđe T., Dramićanin, Miroslav, Brik, Mikhail G., Steins, Ints, Veljović, Đorđe N., "Polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics fabricated by Spark Plasma Sintering: Densification and microstructure development" in Ceramics International, 40, no. 6 (2014):8853-8862,
https://doi.org/10.1016/j.ceramint.2014.01.108 . .
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Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions

Krsmanović, Radenka; Antić, Željka; Speghini, Adolfo; Brik, Mikhail G.; Bartova, Barbora; Bettinelli, Marco; Dramićanin, Miroslav

(2014)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Speghini, Adolfo
AU  - Brik, Mikhail G.
AU  - Bartova, Barbora
AU  - Bettinelli, Marco
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5944
AB  - A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions
VL  - 36
IS  - 6
SP  - 1083
EP  - 1091
DO  - 10.1016/j.optmat.2014.01.039
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Speghini, Adolfo and Brik, Mikhail G. and Bartova, Barbora and Bettinelli, Marco and Dramićanin, Miroslav",
year = "2014",
abstract = "A series of europium doped (LuxGd1-x)(2)O-3 (x = 1, 0.75, 0.5, 0.25 and 0) nanocrystalline powders were prepared using a polymer complex solution method based on a polyethylene glycol (PEG) as fuel. The samples were systematically characterized by powder X-ray diffraction, scanning and transmission electron microscopies and luminescence spectroscopy. The powders consisted of well-crystalline, cubic phase nanoparticles of 20-50 nm in size, which unit cell parameter increased with Gd content complying with Vegards law. Upon blue light excitation all samples exhibited strong red luminescence typical of trivalent europium ion. The maximum splitting of the F-7(1) manifold changed linearly with the composition change and decreased with lowering of the crystal field strength. Relatively long lifetime values were obtained for D-5(0) (similar to 1.4 ms) and D-5(1) (similar to 120 mu s) levels. For all samples we estimated theoretical densities, refractive index coefficients, optical filling factors and Z(eff), in order to estimate the Judd-Ofelt intensity parameters and branching ratios. The calculated lifetime of D-5(0) level was in line with experimentally obtained luminescence lifetime values. Relative integrated emissions were measured on all samples and Gd2O3 sample proved to have a maximum amount of the characteristic Eu3+ luminescence. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions",
volume = "36",
number = "6",
pages = "1083-1091",
doi = "10.1016/j.optmat.2014.01.039"
}
Krsmanović, R., Antić, Ž., Speghini, A., Brik, M. G., Bartova, B., Bettinelli, M.,& Dramićanin, M.. (2014). Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials, 36(6), 1083-1091.
https://doi.org/10.1016/j.optmat.2014.01.039
Krsmanović R, Antić Ž, Speghini A, Brik MG, Bartova B, Bettinelli M, Dramićanin M. Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions. in Optical Materials. 2014;36(6):1083-1091.
doi:10.1016/j.optmat.2014.01.039 .
Krsmanović, Radenka, Antić, Željka, Speghini, Adolfo, Brik, Mikhail G., Bartova, Barbora, Bettinelli, Marco, Dramićanin, Miroslav, "Structural and spectroscopic studies of Eu3+ doped Lu2O3-Gd2O3 solid solutions" in Optical Materials, 36, no. 6 (2014):1083-1091,
https://doi.org/10.1016/j.optmat.2014.01.039 . .
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The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method

Marinović-Cincović, Milena; Janković, Bojan Ž.; Milićević, Bojana R.; Antić, Željka; Krsmanović, Radenka; Dramićanin, Miroslav

(2013)

TY  - JOUR
AU  - Marinović-Cincović, Milena
AU  - Janković, Bojan Ž.
AU  - Milićević, Bojana R.
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5812
AB  - The comparative kinetic analysis of the non-isothermal crystallization was performed for Eu3+ doped Zn2SiO4 samples, prepared by the polymer induced sol-gel procedure and thermally treated in the conventional furnace and in a microwave oven. This comparison is done using various thermal analysis techniques and is supported by SEM investigation. It was found that low values of Avrami constant (n), identified in the primary crystallization stage resulted from a not constant radial growth rate. One possible mechanism that could alter the linear crystal growth rate is a diffusion-controlled transition, with instantaneous nucleation mechanism. In the secondary crystallization stage, observed for both samples, it was found that the probability for two-dimensional crystal growth increases, especially at higher heating rates. It was found that the substitution of zinc ions by europium ions in Zn2SiO4 matrix can lead to some defects due to different radius and charges, which induces autocatalytic behavior of the tested systems. It was shown that the two-parameter Sestak-Berggren (SB) autocatalytic model best describes the non-isothermal crystallization of doped samples. It has been shown that SB model is adequate to describe the crystallization kinetics for the fine powder samples (crystallite size of 60-65 nm). (C) 2013 Elsevier B.V. All rights reserved.
T2  - Powder Technology
T1  - The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method
VL  - 249
SP  - 497
EP  - 512
DO  - 10.1016/j.powtec.2013.09.020
ER  - 
@article{
author = "Marinović-Cincović, Milena and Janković, Bojan Ž. and Milićević, Bojana R. and Antić, Željka and Krsmanović, Radenka and Dramićanin, Miroslav",
year = "2013",
abstract = "The comparative kinetic analysis of the non-isothermal crystallization was performed for Eu3+ doped Zn2SiO4 samples, prepared by the polymer induced sol-gel procedure and thermally treated in the conventional furnace and in a microwave oven. This comparison is done using various thermal analysis techniques and is supported by SEM investigation. It was found that low values of Avrami constant (n), identified in the primary crystallization stage resulted from a not constant radial growth rate. One possible mechanism that could alter the linear crystal growth rate is a diffusion-controlled transition, with instantaneous nucleation mechanism. In the secondary crystallization stage, observed for both samples, it was found that the probability for two-dimensional crystal growth increases, especially at higher heating rates. It was found that the substitution of zinc ions by europium ions in Zn2SiO4 matrix can lead to some defects due to different radius and charges, which induces autocatalytic behavior of the tested systems. It was shown that the two-parameter Sestak-Berggren (SB) autocatalytic model best describes the non-isothermal crystallization of doped samples. It has been shown that SB model is adequate to describe the crystallization kinetics for the fine powder samples (crystallite size of 60-65 nm). (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Powder Technology",
title = "The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method",
volume = "249",
pages = "497-512",
doi = "10.1016/j.powtec.2013.09.020"
}
Marinović-Cincović, M., Janković, B. Ž., Milićević, B. R., Antić, Ž., Krsmanović, R.,& Dramićanin, M.. (2013). The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method. in Powder Technology, 249, 497-512.
https://doi.org/10.1016/j.powtec.2013.09.020
Marinović-Cincović M, Janković BŽ, Milićević BR, Antić Ž, Krsmanović R, Dramićanin M. The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method. in Powder Technology. 2013;249:497-512.
doi:10.1016/j.powtec.2013.09.020 .
Marinović-Cincović, Milena, Janković, Bojan Ž., Milićević, Bojana R., Antić, Željka, Krsmanović, Radenka, Dramićanin, Miroslav, "The comparative kinetic analysis of the non-isothermal crystallization process of Eu3+ doped Zn2SiO4 powders prepared via polymer induced sol-gel method" in Powder Technology, 249 (2013):497-512,
https://doi.org/10.1016/j.powtec.2013.09.020 . .
21
20
20

Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor

Antić, Željka; Krsmanović, Radenka; Nikolić, Marko G.; Đorđević, Vesna R.; Dramićanin, Miroslav

(2013)

TY  - JOUR
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Nikolić, Marko G.
AU  - Đorđević, Vesna R.
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5358
AB  - In this paper we demonstrate visible up-conversion emission of Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor and discuss possible mechanisms for pumping the upper energy levels of Er3+ ions. Polymer complex solution synthesis yields well crystalline, pure-phase cubic nanopowder with particle size in the 20-50 nm range. Red, green and blue up-conversion emission is measured under near-infrared excitation (1 540 nm), over the temperature range 10-300 K. The red/green intensity ratio indicates that the mechanism responsible for populating red up-conversion is temperature dependent. Decay times are found to be around 0.25 ms for red and green, and around 70 mu s for blue emission.
T2  - International Journal of Materials Research
T1  - Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor
VL  - 104
IS  - 2
SP  - 216
EP  - 221
DO  - 10.3139/146.110843
ER  - 
@article{
author = "Antić, Željka and Krsmanović, Radenka and Nikolić, Marko G. and Đorđević, Vesna R. and Dramićanin, Miroslav",
year = "2013",
abstract = "In this paper we demonstrate visible up-conversion emission of Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor and discuss possible mechanisms for pumping the upper energy levels of Er3+ ions. Polymer complex solution synthesis yields well crystalline, pure-phase cubic nanopowder with particle size in the 20-50 nm range. Red, green and blue up-conversion emission is measured under near-infrared excitation (1 540 nm), over the temperature range 10-300 K. The red/green intensity ratio indicates that the mechanism responsible for populating red up-conversion is temperature dependent. Decay times are found to be around 0.25 ms for red and green, and around 70 mu s for blue emission.",
journal = "International Journal of Materials Research",
title = "Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor",
volume = "104",
number = "2",
pages = "216-221",
doi = "10.3139/146.110843"
}
Antić, Ž., Krsmanović, R., Nikolić, M. G., Đorđević, V. R.,& Dramićanin, M.. (2013). Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor. in International Journal of Materials Research, 104(2), 216-221.
https://doi.org/10.3139/146.110843
Antić Ž, Krsmanović R, Nikolić MG, Đorđević VR, Dramićanin M. Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor. in International Journal of Materials Research. 2013;104(2):216-221.
doi:10.3139/146.110843 .
Antić, Željka, Krsmanović, Radenka, Nikolić, Marko G., Đorđević, Vesna R., Dramićanin, Miroslav, "Processing and characterization of up-converting Er3+ doped (Lu0.5Y0.5)(2)O-3 nanophosphor" in International Journal of Materials Research, 104, no. 2 (2013):216-221,
https://doi.org/10.3139/146.110843 . .
4
4
4

Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure

Đorđević, Vesna R.; Nikolić, Marko G.; Bartova, Barbora; Krsmanović, Radenka; Antić, Željka; Dramićanin, Miroslav

(2013)

TY  - JOUR
AU  - Đorđević, Vesna R.
AU  - Nikolić, Marko G.
AU  - Bartova, Barbora
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5494
AB  - New red sesquioxide phosphor, Eu(3+)doped (Y0.5La0.5)(2)O-3, was synthesized in the form of nanocrystalline powder with excellent structural ordering in cubic bixbyite-type, and with nanoparticle sizes ranging between 10 and 20 nm. Photoluminescence measurements show strong, Eu3+ characteristic, red emission (x = 0.66 and y = 0.34 CIE color coordinates) with an average D-5(0) emission lifetime of about 1.3 ms. Maximum splitting of the F-7(1) manifold of the Eu3+ ion emission behaves in a way directly proportional to the crystal field strength parameter, and experimental results show perfect agreement with theoretical values for pure cubic sesquioxides. This could be used as an indicator of complete dissolution of Y2O3 and La2O3, showing that (Y0.5La0.5)(2)O-3:Eu3+ behaves as a new bixbyite structure oxide, M2O3, where M acts as an ion having average ionic radius of constituting Y3+ and La3+. Emission properties of this new phosphor were documented with detailed assignments of Eu3+ energy levels at 10 K and at room temperature. Second order crystal field parameters were found to be B-20 = -66 cm(-1) and B-22 = -665 cm(-1) at 10 K and B-20 = -78 cm(-1) and B-22 = -602 cm(-1) at room temperature, while for the crystal field strength the value of 1495 cm(-1) was calculated at 10 K and 1355 cm(-1) at room temperature.
T2  - Journal of Nanoparticle Research
T1  - Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure
VL  - 15
IS  - 1
DO  - 10.1007/s11051-012-1322-6
ER  - 
@article{
author = "Đorđević, Vesna R. and Nikolić, Marko G. and Bartova, Barbora and Krsmanović, Radenka and Antić, Željka and Dramićanin, Miroslav",
year = "2013",
abstract = "New red sesquioxide phosphor, Eu(3+)doped (Y0.5La0.5)(2)O-3, was synthesized in the form of nanocrystalline powder with excellent structural ordering in cubic bixbyite-type, and with nanoparticle sizes ranging between 10 and 20 nm. Photoluminescence measurements show strong, Eu3+ characteristic, red emission (x = 0.66 and y = 0.34 CIE color coordinates) with an average D-5(0) emission lifetime of about 1.3 ms. Maximum splitting of the F-7(1) manifold of the Eu3+ ion emission behaves in a way directly proportional to the crystal field strength parameter, and experimental results show perfect agreement with theoretical values for pure cubic sesquioxides. This could be used as an indicator of complete dissolution of Y2O3 and La2O3, showing that (Y0.5La0.5)(2)O-3:Eu3+ behaves as a new bixbyite structure oxide, M2O3, where M acts as an ion having average ionic radius of constituting Y3+ and La3+. Emission properties of this new phosphor were documented with detailed assignments of Eu3+ energy levels at 10 K and at room temperature. Second order crystal field parameters were found to be B-20 = -66 cm(-1) and B-22 = -665 cm(-1) at 10 K and B-20 = -78 cm(-1) and B-22 = -602 cm(-1) at room temperature, while for the crystal field strength the value of 1495 cm(-1) was calculated at 10 K and 1355 cm(-1) at room temperature.",
journal = "Journal of Nanoparticle Research",
title = "Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure",
volume = "15",
number = "1",
doi = "10.1007/s11051-012-1322-6"
}
Đorđević, V. R., Nikolić, M. G., Bartova, B., Krsmanović, R., Antić, Ž.,& Dramićanin, M.. (2013). Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure. in Journal of Nanoparticle Research, 15(1).
https://doi.org/10.1007/s11051-012-1322-6
Đorđević VR, Nikolić MG, Bartova B, Krsmanović R, Antić Ž, Dramićanin M. Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure. in Journal of Nanoparticle Research. 2013;15(1).
doi:10.1007/s11051-012-1322-6 .
Đorđević, Vesna R., Nikolić, Marko G., Bartova, Barbora, Krsmanović, Radenka, Antić, Željka, Dramićanin, Miroslav, "Eu3+-doped (Y0.5La0.5)(2)O-3: new nanophosphor with the bixbyite cubic structure" in Journal of Nanoparticle Research, 15, no. 1 (2013),
https://doi.org/10.1007/s11051-012-1322-6 . .
6
6
6

Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders

Jovanović, Dragana J.; Antić, Željka; Krsmanović, Radenka; Mitrić, Miodrag; Đorđević, Vesna R.; Bartova, Barbora; Dramićanin, Miroslav

(2013)

TY  - JOUR
AU  - Jovanović, Dragana J.
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Mitrić, Miodrag
AU  - Đorđević, Vesna R.
AU  - Bartova, Barbora
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5639
AB  - This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of magnitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders
VL  - 35
IS  - 10
SP  - 1797
EP  - 1804
DO  - 10.1016/j.optmat.2013.03.012
ER  - 
@article{
author = "Jovanović, Dragana J. and Antić, Željka and Krsmanović, Radenka and Mitrić, Miodrag and Đorđević, Vesna R. and Bartova, Barbora and Dramićanin, Miroslav",
year = "2013",
abstract = "This work explores the influence of annealing temperature on microstructure and optical characteristics of Eu3+ doped GdVO4 (0.5, 1, 2 and 3 at.% Eu3+) nanopowders produced via co-precipitation synthesis. Samples were annealed at different temperatures (300 degrees C, 600 degrees C, 800 degrees C and 1000 degrees C) for 2 h and XRD analyses confirmed their tetragonal zircon structure. As-synthesized powders were composed of nanorods (diameter similar to 5 nm, length similar to 20 nm) organized in bundles, which by annealing grew to faceted crystals of round and rectangular shape (50-150 nm in size). Energy band gap shifts to higher energy (3.56 eV - GT 3.72 eV) with decreasing crystallite size (43 nm - GT 13 nm). Photoluminescence emission spectra were recorded using two different excitation wavelengths: lambda(ex) = 330 nm and lambda(ex) = 466 nm, aiming to excite directly the host matrix and Eu3+ ions, respectively. The intensity of most pronounced red transitions is one order of magnitude higher for lambda(ex) = 330 nm due to a strong energy absorption of VO43- groups, followed by efficient energy transfer to Eu3+ ions. We investigated the influence of annealing temperature and concentration of Eu3+ ions on the optical properties, namely photoluminescence emission and excitation, and decay time. The maximum intensity of D-5(0) - GT F-7(2) red emission is observed for sample treated at 1000 degrees C, containing 2 at.% of Eu3+ ions. With the increase of Eu3+ concentration (0.5-3 at.%) the decay time of D-5(0) - GT F-7(2) transition decreases from similar to 1 ms to 0.5 ms. (c) 2013 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders",
volume = "35",
number = "10",
pages = "1797-1804",
doi = "10.1016/j.optmat.2013.03.012"
}
Jovanović, D. J., Antić, Ž., Krsmanović, R., Mitrić, M., Đorđević, V. R., Bartova, B.,& Dramićanin, M.. (2013). Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders. in Optical Materials, 35(10), 1797-1804.
https://doi.org/10.1016/j.optmat.2013.03.012
Jovanović DJ, Antić Ž, Krsmanović R, Mitrić M, Đorđević VR, Bartova B, Dramićanin M. Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders. in Optical Materials. 2013;35(10):1797-1804.
doi:10.1016/j.optmat.2013.03.012 .
Jovanović, Dragana J., Antić, Željka, Krsmanović, Radenka, Mitrić, Miodrag, Đorđević, Vesna R., Bartova, Barbora, Dramićanin, Miroslav, "Annealing effects on the microstructure and photoluminescence of Eu3+-doped GdVO4 powders" in Optical Materials, 35, no. 10 (2013):1797-1804,
https://doi.org/10.1016/j.optmat.2013.03.012 . .
34
29
35

Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles

Validžić, Ivana Lj.; Savić, Tatjana D.; Krsmanović, Radenka; Jovanović, Dragana J.; Novaković, Mirjana M.; Popović, Maja; Čomor, Mirjana

(Elsevier, 2012)

TY  - JOUR
AU  - Validžić, Ivana Lj.
AU  - Savić, Tatjana D.
AU  - Krsmanović, Radenka
AU  - Jovanović, Dragana J.
AU  - Novaković, Mirjana M.
AU  - Popović, Maja
AU  - Čomor, Mirjana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4857
AB  - Zinc oxide (ZnO)/zinc tungstate (ZnWO4) rod-like nanoparticles with diameters in the range of 6-11 nm and length of about 30 nm were synthesized by a low temperature soft solution method at 95-C in the presence of non-ionic copolymer surfactant. It was found that their crystallinity was enhanced with the increase of heating time from 1 h up to 120h. The photoluminescence (PL) measurements showed very strong, narrow UV band peaked at 3.30 eV and a broad visible band peaking at 2.71 eV with a shoulder at about 2.53 eV, for lambda(exc) LT 300 nm. Quite large variations in the intensities of the two PL bands were observed for different excitation wavelengths. The intensity of the main visible band decreases with decreasing excitation energy and disappears when samples are excited lambda = 320 nm (E-exc = 3.875 eV). We found that observed optical properties originate from ZnO phase. UV band gap PL had high intensity for all applied excitations, probably induced by ZnWO4 phase presence on the surface. In addition, two values were found for direct band-gap energy of ZnO/ZnWO4 rod-like nanoparticles 3.62 and 3.21 eV, determined from reflectance spectrum. The photocatalytic behaviour of ZnO is strongly dependent on the formation of ZnWO4 phase, of the obtained rod-like nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Materials Science and Engineering. B: Advanced Functional Solid-State Materials
T1  - Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles
VL  - 177
IS  - 9
SP  - 645
EP  - 651
DO  - 10.1016/j.mseb.2012.03.044
ER  - 
@article{
author = "Validžić, Ivana Lj. and Savić, Tatjana D. and Krsmanović, Radenka and Jovanović, Dragana J. and Novaković, Mirjana M. and Popović, Maja and Čomor, Mirjana",
year = "2012",
abstract = "Zinc oxide (ZnO)/zinc tungstate (ZnWO4) rod-like nanoparticles with diameters in the range of 6-11 nm and length of about 30 nm were synthesized by a low temperature soft solution method at 95-C in the presence of non-ionic copolymer surfactant. It was found that their crystallinity was enhanced with the increase of heating time from 1 h up to 120h. The photoluminescence (PL) measurements showed very strong, narrow UV band peaked at 3.30 eV and a broad visible band peaking at 2.71 eV with a shoulder at about 2.53 eV, for lambda(exc) LT 300 nm. Quite large variations in the intensities of the two PL bands were observed for different excitation wavelengths. The intensity of the main visible band decreases with decreasing excitation energy and disappears when samples are excited lambda = 320 nm (E-exc = 3.875 eV). We found that observed optical properties originate from ZnO phase. UV band gap PL had high intensity for all applied excitations, probably induced by ZnWO4 phase presence on the surface. In addition, two values were found for direct band-gap energy of ZnO/ZnWO4 rod-like nanoparticles 3.62 and 3.21 eV, determined from reflectance spectrum. The photocatalytic behaviour of ZnO is strongly dependent on the formation of ZnWO4 phase, of the obtained rod-like nanoparticles. (C) 2012 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Materials Science and Engineering. B: Advanced Functional Solid-State Materials",
title = "Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles",
volume = "177",
number = "9",
pages = "645-651",
doi = "10.1016/j.mseb.2012.03.044"
}
Validžić, I. Lj., Savić, T. D., Krsmanović, R., Jovanović, D. J., Novaković, M. M., Popović, M.,& Čomor, M.. (2012). Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles. in Materials Science and Engineering. B: Advanced Functional Solid-State Materials
Elsevier., 177(9), 645-651.
https://doi.org/10.1016/j.mseb.2012.03.044
Validžić IL, Savić TD, Krsmanović R, Jovanović DJ, Novaković MM, Popović M, Čomor M. Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles. in Materials Science and Engineering. B: Advanced Functional Solid-State Materials. 2012;177(9):645-651.
doi:10.1016/j.mseb.2012.03.044 .
Validžić, Ivana Lj., Savić, Tatjana D., Krsmanović, Radenka, Jovanović, Dragana J., Novaković, Mirjana M., Popović, Maja, Čomor, Mirjana, "Synthesis, strong room-temperature PL and photocatalytic activity of ZnO/ZnWO4 rod-like nanoparticles" in Materials Science and Engineering. B: Advanced Functional Solid-State Materials, 177, no. 9 (2012):645-651,
https://doi.org/10.1016/j.mseb.2012.03.044 . .
26
22
30

Thermographic properties of Sm3+-doped GdVO4 phosphor

Nikolić, Marko G.; Jovanović, Dragana J.; Đorđević, Vesna R.; Antić, Željka; Krsmanović, Radenka; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Nikolić, Marko G.
AU  - Jovanović, Dragana J.
AU  - Đorđević, Vesna R.
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6952
AB  - Rare-earth orthovanadates are important hosts for the luminescence of rare earth activators with considerable practical applications in the artificial production of light. In this paper we investigated the possibility for GdVO4:Sm3+ usage in phosphor thermometry by observing the temperature changes of trivalent samarium transitions from F-4(3/2) and (4)G(5/2) energy levels to the ground state. A set of three samples of Sm3+-doped GdVO4 (0.5, 1 and 2 mol.% Sm3+ with respect to Gd3+ ions) was produced via solid state synthesis. The sample crystalline structure is confirmed from x-ray diffraction (XRD) measurements. Photoluminescence measurements were recorded in the temperature range 293-823 K and the fluorescence intensity ratio of the paired emissions bands was studied as a function of temperature. All three GdVO4:Sm3+ samples proved to have good potential for the development of thermographic phosphors, whereas the maximum sensitivity of approximately 4.5x10(-4) K-1 was found for the sample with 2 mol.% Sm3+ in the temperature region around 750 K.
T2  - Physica Scripta
T1  - Thermographic properties of Sm3+-doped GdVO4 phosphor
VL  - T149
DO  - 10.1088/0031-8949/2012/T149/014063
ER  - 
@article{
author = "Nikolić, Marko G. and Jovanović, Dragana J. and Đorđević, Vesna R. and Antić, Željka and Krsmanović, Radenka and Dramićanin, Miroslav",
year = "2012",
abstract = "Rare-earth orthovanadates are important hosts for the luminescence of rare earth activators with considerable practical applications in the artificial production of light. In this paper we investigated the possibility for GdVO4:Sm3+ usage in phosphor thermometry by observing the temperature changes of trivalent samarium transitions from F-4(3/2) and (4)G(5/2) energy levels to the ground state. A set of three samples of Sm3+-doped GdVO4 (0.5, 1 and 2 mol.% Sm3+ with respect to Gd3+ ions) was produced via solid state synthesis. The sample crystalline structure is confirmed from x-ray diffraction (XRD) measurements. Photoluminescence measurements were recorded in the temperature range 293-823 K and the fluorescence intensity ratio of the paired emissions bands was studied as a function of temperature. All three GdVO4:Sm3+ samples proved to have good potential for the development of thermographic phosphors, whereas the maximum sensitivity of approximately 4.5x10(-4) K-1 was found for the sample with 2 mol.% Sm3+ in the temperature region around 750 K.",
journal = "Physica Scripta",
title = "Thermographic properties of Sm3+-doped GdVO4 phosphor",
volume = "T149",
doi = "10.1088/0031-8949/2012/T149/014063"
}
Nikolić, M. G., Jovanović, D. J., Đorđević, V. R., Antić, Ž., Krsmanović, R.,& Dramićanin, M.. (2012). Thermographic properties of Sm3+-doped GdVO4 phosphor. in Physica Scripta, T149.
https://doi.org/10.1088/0031-8949/2012/T149/014063
Nikolić MG, Jovanović DJ, Đorđević VR, Antić Ž, Krsmanović R, Dramićanin M. Thermographic properties of Sm3+-doped GdVO4 phosphor. in Physica Scripta. 2012;T149.
doi:10.1088/0031-8949/2012/T149/014063 .
Nikolić, Marko G., Jovanović, Dragana J., Đorđević, Vesna R., Antić, Željka, Krsmanović, Radenka, Dramićanin, Miroslav, "Thermographic properties of Sm3+-doped GdVO4 phosphor" in Physica Scripta, T149 (2012),
https://doi.org/10.1088/0031-8949/2012/T149/014063 . .
30
18
32

PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties

Đačanin, Ljubica; Lukić, Svetlana R.; Petrović, Dragoslav M.; Antić, Željka; Krsmanović, Radenka; Marinović-Cincović, Milena; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Đačanin, Ljubica
AU  - Lukić, Svetlana R.
AU  - Petrović, Dragoslav M.
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4897
AB  - Luminescent composites of poly(methylmethacrylate) (PMMA) and nanophosphors (Zn2SiO4:Mn2+, Zn2SiO4:Eu3+) were prepared by dispersion casting method. It was found that nanoparticles embedded in PMMA matrix preserve their typical phosphorescence emission. The influence of Zn2SiO4 nanofillers on thermal properties of PMMA was also investigated. A shift towards higher glass transition temperatures and slight improvements in thermal stability of the nanocomposites compared to pure PMMA were observed and are discussed herein.
T2  - Journal of Materials Engineering and Performance
T1  - PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties
VL  - 21
IS  - 7
SP  - 1509
EP  - 1513
DO  - 10.1007/s11665-011-0049-3
ER  - 
@article{
author = "Đačanin, Ljubica and Lukić, Svetlana R. and Petrović, Dragoslav M. and Antić, Željka and Krsmanović, Radenka and Marinović-Cincović, Milena and Dramićanin, Miroslav",
year = "2012",
abstract = "Luminescent composites of poly(methylmethacrylate) (PMMA) and nanophosphors (Zn2SiO4:Mn2+, Zn2SiO4:Eu3+) were prepared by dispersion casting method. It was found that nanoparticles embedded in PMMA matrix preserve their typical phosphorescence emission. The influence of Zn2SiO4 nanofillers on thermal properties of PMMA was also investigated. A shift towards higher glass transition temperatures and slight improvements in thermal stability of the nanocomposites compared to pure PMMA were observed and are discussed herein.",
journal = "Journal of Materials Engineering and Performance",
title = "PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties",
volume = "21",
number = "7",
pages = "1509-1513",
doi = "10.1007/s11665-011-0049-3"
}
Đačanin, L., Lukić, S. R., Petrović, D. M., Antić, Ž., Krsmanović, R., Marinović-Cincović, M.,& Dramićanin, M.. (2012). PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties. in Journal of Materials Engineering and Performance, 21(7), 1509-1513.
https://doi.org/10.1007/s11665-011-0049-3
Đačanin L, Lukić SR, Petrović DM, Antić Ž, Krsmanović R, Marinović-Cincović M, Dramićanin M. PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties. in Journal of Materials Engineering and Performance. 2012;21(7):1509-1513.
doi:10.1007/s11665-011-0049-3 .
Đačanin, Ljubica, Lukić, Svetlana R., Petrović, Dragoslav M., Antić, Željka, Krsmanović, Radenka, Marinović-Cincović, Milena, Dramićanin, Miroslav, "PMMA/Zn2SiO4:Eu3+(Mn2+) Composites: Preparation, Optical, and Thermal Properties" in Journal of Materials Engineering and Performance, 21, no. 7 (2012):1509-1513,
https://doi.org/10.1007/s11665-011-0049-3 . .
8
7
7

Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity

Krsmanović, Radenka; Antić, Željka; Bartova, Barbora; Brik, Mikhail G.; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Bartova, Barbora
AU  - Brik, Mikhail G.
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4700
AB  - Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. The morphology and optical characteristics of the starting powder and prepared ceramic samples were monitored and discussed in order to identify the changes induced with the variations of initial compacting pressure, which influence is often neglected, and with sintering temperature. The grain size tends to decrease significantly with increasing pressure, even when elevated temperatures are used for annealing, while low compacting pressure resulted in grain coarsening and, in some cases, even in anomalous morphology of ceramic samples. Luminescence emission in ceramic samples decays faster than in nanopowders, that is in complete agreement with the grain formation and gradual transformation to the bulk material. Judd-Ofelt intensity parameters and branching ratios were calculated taking into account the difference in effective refractive index for nanopowder and ceramic samples. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity
VL  - 38
IS  - 2
SP  - 1303
EP  - 1313
DO  - 10.1016/j.ceramint.2011.09.004
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Bartova, Barbora and Brik, Mikhail G. and Dramićanin, Miroslav",
year = "2012",
abstract = "Nanocrystalline (Y0.7Gd0.3)(2)O-3 powder, synthetised via polymer complex solution method, was compacted into 25 pellets applying high pressures (173-867 MPa) for 30 s that were subsequently sintered at different temperatures (800-1400 degrees C) for 18 h. The morphology and optical characteristics of the starting powder and prepared ceramic samples were monitored and discussed in order to identify the changes induced with the variations of initial compacting pressure, which influence is often neglected, and with sintering temperature. The grain size tends to decrease significantly with increasing pressure, even when elevated temperatures are used for annealing, while low compacting pressure resulted in grain coarsening and, in some cases, even in anomalous morphology of ceramic samples. Luminescence emission in ceramic samples decays faster than in nanopowders, that is in complete agreement with the grain formation and gradual transformation to the bulk material. Judd-Ofelt intensity parameters and branching ratios were calculated taking into account the difference in effective refractive index for nanopowder and ceramic samples. (C) 2011 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity",
volume = "38",
number = "2",
pages = "1303-1313",
doi = "10.1016/j.ceramint.2011.09.004"
}
Krsmanović, R., Antić, Ž., Bartova, B., Brik, M. G.,& Dramićanin, M.. (2012). Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity. in Ceramics International, 38(2), 1303-1313.
https://doi.org/10.1016/j.ceramint.2011.09.004
Krsmanović R, Antić Ž, Bartova B, Brik MG, Dramićanin M. Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity. in Ceramics International. 2012;38(2):1303-1313.
doi:10.1016/j.ceramint.2011.09.004 .
Krsmanović, Radenka, Antić, Željka, Bartova, Barbora, Brik, Mikhail G., Dramićanin, Miroslav, "Fabrication of polycrystalline (Y0.7Gd0.3)(2)O-3:Eu3+ ceramics: The influence of initial pressure and sintering temperature on its morphology and photoluminescence activity" in Ceramics International, 38, no. 2 (2012):1303-1313,
https://doi.org/10.1016/j.ceramint.2011.09.004 . .
14
14
15

Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method

Antić, Željka; Krsmanović, Radenka; Marinović-Cincović, Milena; Mitrić, Miodrag; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Marinović-Cincović, Milena
AU  - Mitrić, Miodrag
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4988
AB  - We present a polymer complex solution method using a modified combustion synthesis procedure, for the production of well crystalline, sub-micron gadolinia-doped ceria powders of Ce0.9Gd0.1O1.95 composition. Polyethylene glycol of two different molecular weights (200 and 20000) was used as both fuel for the combustion and nucleating agent for the crystallization process. The synthesized materials were characterized using X-ray diffraction, thermal analysis, scanning electron microscopy, and optical and photoluminescence spectroscopy. The powders are quite similar, fully crystallized in a cubic fluorite-type phase with average crystallite size of about 70 nm and average particle size in the range 220-240 nm. UV-vis absorption spectra show the absorption edge at 3.26 eV. The presence of oxygen vacancies, confirmed indirectly by clear violet emission observed at 428 nm, originated from the D-5(1) - GT F-4(1) transition of Ce(3+)ions.
T2  - International Journal of Materials Research
T1  - Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method
VL  - 103
IS  - 7
SP  - 884
EP  - 888
DO  - 10.3139/146.110710
ER  - 
@article{
author = "Antić, Željka and Krsmanović, Radenka and Marinović-Cincović, Milena and Mitrić, Miodrag and Dramićanin, Miroslav",
year = "2012",
abstract = "We present a polymer complex solution method using a modified combustion synthesis procedure, for the production of well crystalline, sub-micron gadolinia-doped ceria powders of Ce0.9Gd0.1O1.95 composition. Polyethylene glycol of two different molecular weights (200 and 20000) was used as both fuel for the combustion and nucleating agent for the crystallization process. The synthesized materials were characterized using X-ray diffraction, thermal analysis, scanning electron microscopy, and optical and photoluminescence spectroscopy. The powders are quite similar, fully crystallized in a cubic fluorite-type phase with average crystallite size of about 70 nm and average particle size in the range 220-240 nm. UV-vis absorption spectra show the absorption edge at 3.26 eV. The presence of oxygen vacancies, confirmed indirectly by clear violet emission observed at 428 nm, originated from the D-5(1) - GT F-4(1) transition of Ce(3+)ions.",
journal = "International Journal of Materials Research",
title = "Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method",
volume = "103",
number = "7",
pages = "884-888",
doi = "10.3139/146.110710"
}
Antić, Ž., Krsmanović, R., Marinović-Cincović, M., Mitrić, M.,& Dramićanin, M.. (2012). Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method. in International Journal of Materials Research, 103(7), 884-888.
https://doi.org/10.3139/146.110710
Antić Ž, Krsmanović R, Marinović-Cincović M, Mitrić M, Dramićanin M. Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method. in International Journal of Materials Research. 2012;103(7):884-888.
doi:10.3139/146.110710 .
Antić, Željka, Krsmanović, Radenka, Marinović-Cincović, Milena, Mitrić, Miodrag, Dramićanin, Miroslav, "Structural and optical investigation of gadolinia-doped ceria powders prepared by polymer complex solution method" in International Journal of Materials Research, 103, no. 7 (2012):884-888,
https://doi.org/10.3139/146.110710 . .
7
6
7

Multisite luminescence of rare earth doped TiO2 anatase nanoparticles

Antić, Željka; Krsmanović, Radenka; Nikolić, Marko G.; Marinović-Cincović, Milena; Mitrić, Miodrag; Polizzi, Stefano; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Nikolić, Marko G.
AU  - Marinović-Cincović, Milena
AU  - Mitrić, Miodrag
AU  - Polizzi, Stefano
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5056
AB  - Eu3+, Sm3+ and Tb3+ ions have been incorporated into anatase TiO2 nanocrystals via hydrolytic sol gel method. Pure anatase phase was confirmed with XRD and TEM measurements. Band gap energies change slightly with rare earth incorporation, from 3.32 eV for undoped TiO2 to 3.15 eV, 3.25 eV and 3.29 eV for Tb3+, Sm3+ and Eu3+ doped TiO2. Photoluminescence of Eu3+ and Sm3+ originated from three different sites in TiO2 nanocrystals have been identified with the laser-excited site-selective spectroscopy measurements at 10 K. One site exhibits broad emission peaks, which are ascribed to the distorted lattice site near the surface. Other two sites, associated with the inner lattice, show significantly sharper fluorescence lines as a consequence of an ordered crystalline environment. The emission decays of Eu3+ and Sm3+ have similar values for inner-lattice sites and longer lifetimes for near-surface sites. The luminescence of Tb3+ doped TiO2 nanocrystals was immeasurably weak. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Multisite luminescence of rare earth doped TiO2 anatase nanoparticles
VL  - 135
IS  - 2-3
SP  - 1064
EP  - 1069
DO  - 10.1016/j.matchemphys.2012.06.016
ER  - 
@article{
author = "Antić, Željka and Krsmanović, Radenka and Nikolić, Marko G. and Marinović-Cincović, Milena and Mitrić, Miodrag and Polizzi, Stefano and Dramićanin, Miroslav",
year = "2012",
abstract = "Eu3+, Sm3+ and Tb3+ ions have been incorporated into anatase TiO2 nanocrystals via hydrolytic sol gel method. Pure anatase phase was confirmed with XRD and TEM measurements. Band gap energies change slightly with rare earth incorporation, from 3.32 eV for undoped TiO2 to 3.15 eV, 3.25 eV and 3.29 eV for Tb3+, Sm3+ and Eu3+ doped TiO2. Photoluminescence of Eu3+ and Sm3+ originated from three different sites in TiO2 nanocrystals have been identified with the laser-excited site-selective spectroscopy measurements at 10 K. One site exhibits broad emission peaks, which are ascribed to the distorted lattice site near the surface. Other two sites, associated with the inner lattice, show significantly sharper fluorescence lines as a consequence of an ordered crystalline environment. The emission decays of Eu3+ and Sm3+ have similar values for inner-lattice sites and longer lifetimes for near-surface sites. The luminescence of Tb3+ doped TiO2 nanocrystals was immeasurably weak. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Multisite luminescence of rare earth doped TiO2 anatase nanoparticles",
volume = "135",
number = "2-3",
pages = "1064-1069",
doi = "10.1016/j.matchemphys.2012.06.016"
}
Antić, Ž., Krsmanović, R., Nikolić, M. G., Marinović-Cincović, M., Mitrić, M., Polizzi, S.,& Dramićanin, M.. (2012). Multisite luminescence of rare earth doped TiO2 anatase nanoparticles. in Materials Chemistry and Physics, 135(2-3), 1064-1069.
https://doi.org/10.1016/j.matchemphys.2012.06.016
Antić Ž, Krsmanović R, Nikolić MG, Marinović-Cincović M, Mitrić M, Polizzi S, Dramićanin M. Multisite luminescence of rare earth doped TiO2 anatase nanoparticles. in Materials Chemistry and Physics. 2012;135(2-3):1064-1069.
doi:10.1016/j.matchemphys.2012.06.016 .
Antić, Željka, Krsmanović, Radenka, Nikolić, Marko G., Marinović-Cincović, Milena, Mitrić, Miodrag, Polizzi, Stefano, Dramićanin, Miroslav, "Multisite luminescence of rare earth doped TiO2 anatase nanoparticles" in Materials Chemistry and Physics, 135, no. 2-3 (2012):1064-1069,
https://doi.org/10.1016/j.matchemphys.2012.06.016 . .
117
76
111

Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor

Lojpur, Vesna; Antić, Željka; Krsmanović, Radenka; Medić, Mina M.; Nikolić, Marko G.; Dramićanin, Miroslav

(2012)

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Medić, Mina M.
AU  - Nikolić, Marko G.
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5280
AB  - Samples of Lu2O3:Eu3+ (3 at. % Eu) and Lu2O3:Sm3+ (1 at. % Sm), were prepared via the polymer complex solution method using poly(ethylene glycol) as the fuel and as nucleation agent for crystallization process. Knowing that lutetium oxide has high chemical stability and temperature resistance, in this study, the possibility for its application in high-temperature phosphor thermometry was investigated. This non-contact technique uses the thermal dependence of phosphor fluorescence to measure temperature remotely. The structural and morphological properties were investigated by X-ray powder diffraction (XRPD) analysis and transmission electron microscopy (TEM). The obtained results confirmed that this synthesis yields the desired crystalline structure with particle sizes in the range from 30 to 50 nm. Photoluminescence emission measurements were recorded in the temperature range from ambient up to 873 K. The obtained results demonstrated the performance of Eu3+- and Sm3+-doped Lu2O3 as high temperature thermographic phosphors of very good sensitivity.
T2  - Journal of the Serbian Chemical Society
T1  - Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor
VL  - 77
IS  - 12
SP  - 1735
EP  - 1746
DO  - 10.2298/JSC121021140L
ER  - 
@article{
author = "Lojpur, Vesna and Antić, Željka and Krsmanović, Radenka and Medić, Mina M. and Nikolić, Marko G. and Dramićanin, Miroslav",
year = "2012",
abstract = "Samples of Lu2O3:Eu3+ (3 at. % Eu) and Lu2O3:Sm3+ (1 at. % Sm), were prepared via the polymer complex solution method using poly(ethylene glycol) as the fuel and as nucleation agent for crystallization process. Knowing that lutetium oxide has high chemical stability and temperature resistance, in this study, the possibility for its application in high-temperature phosphor thermometry was investigated. This non-contact technique uses the thermal dependence of phosphor fluorescence to measure temperature remotely. The structural and morphological properties were investigated by X-ray powder diffraction (XRPD) analysis and transmission electron microscopy (TEM). The obtained results confirmed that this synthesis yields the desired crystalline structure with particle sizes in the range from 30 to 50 nm. Photoluminescence emission measurements were recorded in the temperature range from ambient up to 873 K. The obtained results demonstrated the performance of Eu3+- and Sm3+-doped Lu2O3 as high temperature thermographic phosphors of very good sensitivity.",
journal = "Journal of the Serbian Chemical Society",
title = "Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor",
volume = "77",
number = "12",
pages = "1735-1746",
doi = "10.2298/JSC121021140L"
}
Lojpur, V., Antić, Ž., Krsmanović, R., Medić, M. M., Nikolić, M. G.,& Dramićanin, M.. (2012). Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor. in Journal of the Serbian Chemical Society, 77(12), 1735-1746.
https://doi.org/10.2298/JSC121021140L
Lojpur V, Antić Ž, Krsmanović R, Medić MM, Nikolić MG, Dramićanin M. Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor. in Journal of the Serbian Chemical Society. 2012;77(12):1735-1746.
doi:10.2298/JSC121021140L .
Lojpur, Vesna, Antić, Željka, Krsmanović, Radenka, Medić, Mina M., Nikolić, Marko G., Dramićanin, Miroslav, "Thermographic properties of Eu3+- and Sm3+-doped Lu2O3 nanophosphor" in Journal of the Serbian Chemical Society, 77, no. 12 (2012):1735-1746,
https://doi.org/10.2298/JSC121021140L . .
26
15
23

Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers

Đoković, Vladimir; Božanić, Dušan K.; Vodnik, Vesna; Krsmanović, Radenka; Trandafilović, Lidija V.; Dimitrijević-Branković, Suzana I.

(2011)

TY  - CONF
AU  - Đoković, Vladimir
AU  - Božanić, Dušan K.
AU  - Vodnik, Vesna
AU  - Krsmanović, Radenka
AU  - Trandafilović, Lidija V.
AU  - Dimitrijević-Branković, Suzana I.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6930
AB  - We present the results on the structure and the optical properties of noble metal (Ag, Au) and oxide (ZnO) nanoparticles synthesized by various methods in different polysaccharide matrices such as chitosan, glycogen, alginate and starch. The structure of the obtained nanoparticles was studied in detail with microscopic techniques (TEM, SEM), while the XPS spectroscopy was used to investigate the effects at the nanoparticle-biomolecule interfaces. The antimicrobial activity of the nanocomposite films with Ag nanoparticles was tested against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens. In addition, we will present the results on the structure and optical properties of the tryptophan amino acid functionalized silver nanoparticles dispersed in water soluble polymer matrices.
T1  - Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers
VL  - 8098
DO  - 10.1117/12.899934
ER  - 
@conference{
author = "Đoković, Vladimir and Božanić, Dušan K. and Vodnik, Vesna and Krsmanović, Radenka and Trandafilović, Lidija V. and Dimitrijević-Branković, Suzana I.",
year = "2011",
abstract = "We present the results on the structure and the optical properties of noble metal (Ag, Au) and oxide (ZnO) nanoparticles synthesized by various methods in different polysaccharide matrices such as chitosan, glycogen, alginate and starch. The structure of the obtained nanoparticles was studied in detail with microscopic techniques (TEM, SEM), while the XPS spectroscopy was used to investigate the effects at the nanoparticle-biomolecule interfaces. The antimicrobial activity of the nanocomposite films with Ag nanoparticles was tested against the Staphylococcus aureus, Escherichia coli and Candida albicans pathogens. In addition, we will present the results on the structure and optical properties of the tryptophan amino acid functionalized silver nanoparticles dispersed in water soluble polymer matrices.",
title = "Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers",
volume = "8098",
doi = "10.1117/12.899934"
}
Đoković, V., Božanić, D. K., Vodnik, V., Krsmanović, R., Trandafilović, L. V.,& Dimitrijević-Branković, S. I.. (2011). Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers. , 8098.
https://doi.org/10.1117/12.899934
Đoković V, Božanić DK, Vodnik V, Krsmanović R, Trandafilović LV, Dimitrijević-Branković SI. Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers. 2011;8098.
doi:10.1117/12.899934 .
Đoković, Vladimir, Božanić, Dušan K., Vodnik, Vesna, Krsmanović, Radenka, Trandafilović, Lidija V., Dimitrijević-Branković, Suzana I., "Structure and optical properties of noble metal and oxide nanoparticles dispersed in various polysaccharide biopolymers", 8098 (2011),
https://doi.org/10.1117/12.899934 . .
6
1
5

Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films

Božanić, Dušan K.; Đoković, Vladimir; Dimitrijević-Branković, Suzana I.; Krsmanović, Radenka; McPherson, Michael; Nair, P. Sreekumari; Georges, Michael K.; Radhakrishnan, Thottackad

(2011)

TY  - JOUR
AU  - Božanić, Dušan K.
AU  - Đoković, Vladimir
AU  - Dimitrijević-Branković, Suzana I.
AU  - Krsmanović, Radenka
AU  - McPherson, Michael
AU  - Nair, P. Sreekumari
AU  - Georges, Michael K.
AU  - Radhakrishnan, Thottackad
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4543
AB  - A sago starch biopolymer with embedded silver nanoparticles has been studied as a material for the prevention of microbial growth. Approximately 8 nm in size, silver nanoparticles have been synthesized by reduction of the silver salt in aqueous solution in the presence of sago starch using sodium borohydride as a reducing agent. The obtained solutions were cast on glass plates to obtain thin supported silver-starch nanocomposite films. The morphology of the nanocomposites was investigated by scanning and transmission electron microscopy. UV-Vis absorption spectroscopy showed that during the film formation a part of the silver nanoparticles has been trapped in the water present in the sample, which enabled their partial oxidation into active Ag(+) species. The oxidation of the silver nanoparticles was confirmed by X-ray photoelectron spectroscopy. The antimicrobial activity tests have shown that the nanocomposite material can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans. (C) Koninklijke Brill NV, Leiden, 2011
T2  - Journal of Biomaterials Science: Polymer Edition
T1  - Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films
VL  - 22
IS  - 17
SP  - 2343
EP  - 2355
DO  - 10.1163/092050610X539532
ER  - 
@article{
author = "Božanić, Dušan K. and Đoković, Vladimir and Dimitrijević-Branković, Suzana I. and Krsmanović, Radenka and McPherson, Michael and Nair, P. Sreekumari and Georges, Michael K. and Radhakrishnan, Thottackad",
year = "2011",
abstract = "A sago starch biopolymer with embedded silver nanoparticles has been studied as a material for the prevention of microbial growth. Approximately 8 nm in size, silver nanoparticles have been synthesized by reduction of the silver salt in aqueous solution in the presence of sago starch using sodium borohydride as a reducing agent. The obtained solutions were cast on glass plates to obtain thin supported silver-starch nanocomposite films. The morphology of the nanocomposites was investigated by scanning and transmission electron microscopy. UV-Vis absorption spectroscopy showed that during the film formation a part of the silver nanoparticles has been trapped in the water present in the sample, which enabled their partial oxidation into active Ag(+) species. The oxidation of the silver nanoparticles was confirmed by X-ray photoelectron spectroscopy. The antimicrobial activity tests have shown that the nanocomposite material can be successfully employed to prevent the viability and growth of the common pathogens Staphylococcus aureus, Escherichia coli and Candida albicans. (C) Koninklijke Brill NV, Leiden, 2011",
journal = "Journal of Biomaterials Science: Polymer Edition",
title = "Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films",
volume = "22",
number = "17",
pages = "2343-2355",
doi = "10.1163/092050610X539532"
}
Božanić, D. K., Đoković, V., Dimitrijević-Branković, S. I., Krsmanović, R., McPherson, M., Nair, P. S., Georges, M. K.,& Radhakrishnan, T.. (2011). Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films. in Journal of Biomaterials Science: Polymer Edition, 22(17), 2343-2355.
https://doi.org/10.1163/092050610X539532
Božanić DK, Đoković V, Dimitrijević-Branković SI, Krsmanović R, McPherson M, Nair PS, Georges MK, Radhakrishnan T. Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films. in Journal of Biomaterials Science: Polymer Edition. 2011;22(17):2343-2355.
doi:10.1163/092050610X539532 .
Božanić, Dušan K., Đoković, Vladimir, Dimitrijević-Branković, Suzana I., Krsmanović, Radenka, McPherson, Michael, Nair, P. Sreekumari, Georges, Michael K., Radhakrishnan, Thottackad, "Inhibition of Microbial Growth by Silver-Starch Nanocomposite Thin Films" in Journal of Biomaterials Science: Polymer Edition, 22, no. 17 (2011):2343-2355,
https://doi.org/10.1163/092050610X539532 . .
2
31
20
25

Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor

Krsmanović, Radenka; Antić, Željka; Nikolić, Marko; Jovanović, D.; Đorđević, V.; Dramićanin, Miroslav

(Belgrade : Vinča Institute of Nuclear Sciences, 2011)

TY  - CONF
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Nikolić, Marko
AU  - Jovanović, D.
AU  - Đorđević, V.
AU  - Dramićanin, Miroslav
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10972
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade
T1  - Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor
SP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10972
ER  - 
@conference{
author = "Krsmanović, Radenka and Antić, Željka and Nikolić, Marko and Jovanović, D. and Đorđević, V. and Dramićanin, Miroslav",
year = "2011",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade",
title = "Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor",
pages = "71",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10972"
}
Krsmanović, R., Antić, Ž., Nikolić, M., Jovanović, D., Đorđević, V.,& Dramićanin, M.. (2011). Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor. in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 71.
https://hdl.handle.net/21.15107/rcub_vinar_10972
Krsmanović R, Antić Ž, Nikolić M, Jovanović D, Đorđević V, Dramićanin M. Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor. in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade. 2011;:71.
https://hdl.handle.net/21.15107/rcub_vinar_10972 .
Krsmanović, Radenka, Antić, Željka, Nikolić, Marko, Jovanović, D., Đorđević, V., Dramićanin, Miroslav, "Thermographic properties of Eu3+ and Sm3+ doped Lu2O3 nanophosphor" in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade (2011):71,
https://hdl.handle.net/21.15107/rcub_vinar_10972 .

Thermographic properties of Sm3+-doped GdVO4 phosphor

Nikolić, Marko G.; Jovanović, Dragana J.; Đorđević, Vesna R.; Antić, Željka; Krsmanović, Radenka; Dramićanin, Miroslav

(Belgrade : Vinča Institute of Nuclear Sciences, 2011)

TY  - CONF
AU  - Nikolić, Marko G.
AU  - Jovanović, Dragana J.
AU  - Đorđević, Vesna R.
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Dramićanin, Miroslav
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10973
PB  - Belgrade : Vinča Institute of Nuclear Sciences
C3  - PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade
T1  - Thermographic properties of Sm3+-doped GdVO4 phosphor
SP  - 70
EP  - 71
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10973
ER  - 
@conference{
author = "Nikolić, Marko G. and Jovanović, Dragana J. and Đorđević, Vesna R. and Antić, Željka and Krsmanović, Radenka and Dramićanin, Miroslav",
year = "2011",
publisher = "Belgrade : Vinča Institute of Nuclear Sciences",
journal = "PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade",
title = "Thermographic properties of Sm3+-doped GdVO4 phosphor",
pages = "70-71",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10973"
}
Nikolić, M. G., Jovanović, D. J., Đorđević, V. R., Antić, Ž., Krsmanović, R.,& Dramićanin, M.. (2011). Thermographic properties of Sm3+-doped GdVO4 phosphor. in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade
Belgrade : Vinča Institute of Nuclear Sciences., 70-71.
https://hdl.handle.net/21.15107/rcub_vinar_10973
Nikolić MG, Jovanović DJ, Đorđević VR, Antić Ž, Krsmanović R, Dramićanin M. Thermographic properties of Sm3+-doped GdVO4 phosphor. in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade. 2011;:70-71.
https://hdl.handle.net/21.15107/rcub_vinar_10973 .
Nikolić, Marko G., Jovanović, Dragana J., Đorđević, Vesna R., Antić, Željka, Krsmanović, Radenka, Dramićanin, Miroslav, "Thermographic properties of Sm3+-doped GdVO4 phosphor" in PHOTONICA2011 : 3rd International School and Conference on Photonics : book of abstracts; August 29- September 2, 2011; Belgrade (2011):70-71,
https://hdl.handle.net/21.15107/rcub_vinar_10973 .

Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders

Krsmanović, Radenka; Antić, Željka; Mitrić, Miodrag; Dramićanin, Miroslav; Brik, Mikhail G.

(2011)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Mitrić, Miodrag
AU  - Dramićanin, Miroslav
AU  - Brik, Mikhail G.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4382
AB  - In this paper we presented structural and spectroscopic study of zinc silicate powder samples doped with divalent nickel and cobalt ions. Results of the Rietveld structural refinement, combined with optical spectroscopic study and theoretical crystal field calculations, are presented and discussed. X-ray diffraction studies were performed to establish reliable structure of the doped samples; in this way the interionic distances and chemical bond angles in Zn2SiO4:Co2+ and Zn2SiO4:Ni2+ were calculated and are reported for the first time. The room temperature reflection spectra of the prepared samples were measured in a spectral region from 4000 to 50000 cm(-1). The exchange charge model of crystal field has been applied to analyze the experimental spectra and assign all observed details in the spectra to the corresponding electronic transitions between the Co2+ and Ni2+ crystal field energy levels. The only input information for the model calculation was the experimentally obtained structural data, which were used for the calculations of the crystal field parameters with subsequent diagonalization of the crystal field Hamiltonian for both ions. Agreement between the calculated and experimentally detected energy levels of impurity ions was good. On the basis of the crystallographic and crystal field studies it was established that there exists a systematic trend of preferential occupation of one out of two possible crystallographic sites (namely, Zn2) for both impurity ions.
T2  - Applied Physics. A: Materials Science and Processing
T1  - Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders
VL  - 104
IS  - 1
SP  - 483
EP  - 492
DO  - 10.1007/s00339-011-6291-6
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Mitrić, Miodrag and Dramićanin, Miroslav and Brik, Mikhail G.",
year = "2011",
abstract = "In this paper we presented structural and spectroscopic study of zinc silicate powder samples doped with divalent nickel and cobalt ions. Results of the Rietveld structural refinement, combined with optical spectroscopic study and theoretical crystal field calculations, are presented and discussed. X-ray diffraction studies were performed to establish reliable structure of the doped samples; in this way the interionic distances and chemical bond angles in Zn2SiO4:Co2+ and Zn2SiO4:Ni2+ were calculated and are reported for the first time. The room temperature reflection spectra of the prepared samples were measured in a spectral region from 4000 to 50000 cm(-1). The exchange charge model of crystal field has been applied to analyze the experimental spectra and assign all observed details in the spectra to the corresponding electronic transitions between the Co2+ and Ni2+ crystal field energy levels. The only input information for the model calculation was the experimentally obtained structural data, which were used for the calculations of the crystal field parameters with subsequent diagonalization of the crystal field Hamiltonian for both ions. Agreement between the calculated and experimentally detected energy levels of impurity ions was good. On the basis of the crystallographic and crystal field studies it was established that there exists a systematic trend of preferential occupation of one out of two possible crystallographic sites (namely, Zn2) for both impurity ions.",
journal = "Applied Physics. A: Materials Science and Processing",
title = "Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders",
volume = "104",
number = "1",
pages = "483-492",
doi = "10.1007/s00339-011-6291-6"
}
Krsmanović, R., Antić, Ž., Mitrić, M., Dramićanin, M.,& Brik, M. G.. (2011). Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders. in Applied Physics. A: Materials Science and Processing, 104(1), 483-492.
https://doi.org/10.1007/s00339-011-6291-6
Krsmanović R, Antić Ž, Mitrić M, Dramićanin M, Brik MG. Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders. in Applied Physics. A: Materials Science and Processing. 2011;104(1):483-492.
doi:10.1007/s00339-011-6291-6 .
Krsmanović, Radenka, Antić, Željka, Mitrić, Miodrag, Dramićanin, Miroslav, Brik, Mikhail G., "Structural, spectroscopic and crystal field analyses of Ni2+ and Co2+ doped Zn2SiO4 powders" in Applied Physics. A: Materials Science and Processing, 104, no. 1 (2011):483-492,
https://doi.org/10.1007/s00339-011-6291-6 . .
24
15
22

Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics

Krsmanović, Radenka; Antić, Željka; Nikolić, Marko G.; Mitrić, Miodrag; Dramićanin, Miroslav

(2011)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Nikolić, Marko G.
AU  - Mitrić, Miodrag
AU  - Dramićanin, Miroslav
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4211
AB  - Herein we presented polymer complex solution method for production of well crystalline europium doped Y2O3 nanopowders. Polyethylene glycol (PEG) of five different molecular weights is used both as a fuel and as a nucleation agent for the crystallization. Powders were cold-pressed and sintered to obtain ceramics. SEM images taken from ceramic pellets indicate formation of a dense structure, with a pronounced grain growth and low pore concentration. Luminescence emission spectra of powders and ceramics are similar, and in good agreement with theoretical data. Lifetimes of Eu3+5D0 level in nanocrystalline powders are higher compared to one observed in bulk, confirming in this case theory of lifetime lengthening in nanophosphors due to the change of effective refraction index. As expected, lifetime values in ceramic samples decrease toward the value in bulk Y2O3. The optical filling factor is calculated from observed decay times, providing a measure of discrepancy between powder and bulk state regarding their luminescent properties. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
T2  - Ceramics International
T1  - Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics
VL  - 37
IS  - 2
SP  - 525
EP  - 531
DO  - 10.1016/j.ceramint.2010.09.040
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Nikolić, Marko G. and Mitrić, Miodrag and Dramićanin, Miroslav",
year = "2011",
abstract = "Herein we presented polymer complex solution method for production of well crystalline europium doped Y2O3 nanopowders. Polyethylene glycol (PEG) of five different molecular weights is used both as a fuel and as a nucleation agent for the crystallization. Powders were cold-pressed and sintered to obtain ceramics. SEM images taken from ceramic pellets indicate formation of a dense structure, with a pronounced grain growth and low pore concentration. Luminescence emission spectra of powders and ceramics are similar, and in good agreement with theoretical data. Lifetimes of Eu3+5D0 level in nanocrystalline powders are higher compared to one observed in bulk, confirming in this case theory of lifetime lengthening in nanophosphors due to the change of effective refraction index. As expected, lifetime values in ceramic samples decrease toward the value in bulk Y2O3. The optical filling factor is calculated from observed decay times, providing a measure of discrepancy between powder and bulk state regarding their luminescent properties. (C) 2010 Elsevier Ltd and Techna Group S.r.l. All rights reserved.",
journal = "Ceramics International",
title = "Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics",
volume = "37",
number = "2",
pages = "525-531",
doi = "10.1016/j.ceramint.2010.09.040"
}
Krsmanović, R., Antić, Ž., Nikolić, M. G., Mitrić, M.,& Dramićanin, M.. (2011). Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics. in Ceramics International, 37(2), 525-531.
https://doi.org/10.1016/j.ceramint.2010.09.040
Krsmanović R, Antić Ž, Nikolić MG, Mitrić M, Dramićanin M. Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics. in Ceramics International. 2011;37(2):525-531.
doi:10.1016/j.ceramint.2010.09.040 .
Krsmanović, Radenka, Antić, Željka, Nikolić, Marko G., Mitrić, Miodrag, Dramićanin, Miroslav, "Preparation of Y2O3:Eu3+ nanopowders via polymer complex solution method and luminescence properties of the sintered ceramics" in Ceramics International, 37, no. 2 (2011):525-531,
https://doi.org/10.1016/j.ceramint.2010.09.040 . .
66
65
68

Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders

Antić, Željka; Krsmanović, Radenka; Wojtowicz, Marcin; Zych, Eugeniusz; Bartova, Barbora; Dramićanin, Miroslav

(2010)

TY  - JOUR
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Wojtowicz, Marcin
AU  - Zych, Eugeniusz
AU  - Bartova, Barbora
AU  - Dramićanin, Miroslav
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6892
AB  - Lutetium and yttrium oxides are promising scintillating materials suitable for use in medical planar X-ray imaging and mammography. In this paper the procedure for preparation of europium doped mixed lutetium-yttrium oxide nanopowders using polymer complex solution synthesis method is presented. Detailed information on nanopowder phase, morphology and crystallinity are obtained using X-ray powder diffraction. SEM and TEM while optical properties are investigated by photoluminescence and radioluminescence measurements. Constituting nanoparticles are 20-40 nm in size, and have excellent structural ordering in cubic bixbyite-type. Unit cell parameter, ionic coordinates, crystal coherence size and microstrain are determined from Rietveld analysis. All powders show strong Eu3+-characteristic red emission, with an average D-5(0) emission lifetime of 1.5 ms. Radioluminescence efficiency is about 15% of the commercial micron-sized Gd2O2S:Eu3+ powder while negligible level of afterglow is found. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders
VL  - 32
IS  - 12
SP  - 1612
EP  - 1617
DO  - 10.1016/j.optmat.2010.05.022
ER  - 
@article{
author = "Antić, Željka and Krsmanović, Radenka and Wojtowicz, Marcin and Zych, Eugeniusz and Bartova, Barbora and Dramićanin, Miroslav",
year = "2010",
abstract = "Lutetium and yttrium oxides are promising scintillating materials suitable for use in medical planar X-ray imaging and mammography. In this paper the procedure for preparation of europium doped mixed lutetium-yttrium oxide nanopowders using polymer complex solution synthesis method is presented. Detailed information on nanopowder phase, morphology and crystallinity are obtained using X-ray powder diffraction. SEM and TEM while optical properties are investigated by photoluminescence and radioluminescence measurements. Constituting nanoparticles are 20-40 nm in size, and have excellent structural ordering in cubic bixbyite-type. Unit cell parameter, ionic coordinates, crystal coherence size and microstrain are determined from Rietveld analysis. All powders show strong Eu3+-characteristic red emission, with an average D-5(0) emission lifetime of 1.5 ms. Radioluminescence efficiency is about 15% of the commercial micron-sized Gd2O2S:Eu3+ powder while negligible level of afterglow is found. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders",
volume = "32",
number = "12",
pages = "1612-1617",
doi = "10.1016/j.optmat.2010.05.022"
}
Antić, Ž., Krsmanović, R., Wojtowicz, M., Zych, E., Bartova, B.,& Dramićanin, M.. (2010). Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders. in Optical Materials, 32(12), 1612-1617.
https://doi.org/10.1016/j.optmat.2010.05.022
Antić Ž, Krsmanović R, Wojtowicz M, Zych E, Bartova B, Dramićanin M. Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders. in Optical Materials. 2010;32(12):1612-1617.
doi:10.1016/j.optmat.2010.05.022 .
Antić, Željka, Krsmanović, Radenka, Wojtowicz, Marcin, Zych, Eugeniusz, Bartova, Barbora, Dramićanin, Miroslav, "Preparation, structural and spectroscopic studies of (YxLu1-x)(2)O-3:Eu3+ nanopowders" in Optical Materials, 32, no. 12 (2010):1612-1617,
https://doi.org/10.1016/j.optmat.2010.05.022 . .
17
18
17

Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties

Antić, Željka; Krsmanović, Radenka; Marinović-Cincović, Milena; Dramićanin, Miroslav

(2010)

TY  - JOUR
AU  - Antić, Željka
AU  - Krsmanović, Radenka
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6872
AB  - In recent years there is an increasing interest in obtaining and investigating composite materials that comprise nanoparticles as fillers and polymers as matrix. Such composites may display combined features of both components, and sometimes even novel properties resulting from their mutual interactions. It is important that both unique size-dependent properties of nanoparticles and favorable properties of polymer material remain preserved in the composite. In this research we investigated the possibility of obtaining composite material using as polymer matrix poly (methyl methacrylate) - PMMA and Gd2O3:Eu3+ nanopowder as filler. Three samples, containing 1, 3 and 5 mass % of Gd2O3:Eu3+, are prepared with a dispersion casting method. The composites exhibited characteristic red emission coming from the D-5(0) - GT F-7(2) transition of Eu3+ ion in Gd2O3:Eu3+. The observed lifetime values, around 1.1 ms, are quite high and suggest successful encapsulation of dopant ions in polymer through gadolinium oxide host. Experimental intensity parameters, transition rates and quantum efficiency of the D-5(0) emission are calculated from emission spectra using Judd-Ofelt theory. Influence of Gd2O3:Eu3+ filler on the modification of glass transition and thermo-degradable properties of the polymer matrix is also investigated. Thermal analyses give evidence of unchanged thermal stability of polymer phase in the composites.
T2  - Acta Physica Polonica A
T1  - Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties
VL  - 117
IS  - 5
SP  - 831
EP  - 836
DO  - 10.12693%2FAPhysPolA.117.831
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6872
ER  - 
@article{
author = "Antić, Željka and Krsmanović, Radenka and Marinović-Cincović, Milena and Dramićanin, Miroslav",
year = "2010",
abstract = "In recent years there is an increasing interest in obtaining and investigating composite materials that comprise nanoparticles as fillers and polymers as matrix. Such composites may display combined features of both components, and sometimes even novel properties resulting from their mutual interactions. It is important that both unique size-dependent properties of nanoparticles and favorable properties of polymer material remain preserved in the composite. In this research we investigated the possibility of obtaining composite material using as polymer matrix poly (methyl methacrylate) - PMMA and Gd2O3:Eu3+ nanopowder as filler. Three samples, containing 1, 3 and 5 mass % of Gd2O3:Eu3+, are prepared with a dispersion casting method. The composites exhibited characteristic red emission coming from the D-5(0) - GT F-7(2) transition of Eu3+ ion in Gd2O3:Eu3+. The observed lifetime values, around 1.1 ms, are quite high and suggest successful encapsulation of dopant ions in polymer through gadolinium oxide host. Experimental intensity parameters, transition rates and quantum efficiency of the D-5(0) emission are calculated from emission spectra using Judd-Ofelt theory. Influence of Gd2O3:Eu3+ filler on the modification of glass transition and thermo-degradable properties of the polymer matrix is also investigated. Thermal analyses give evidence of unchanged thermal stability of polymer phase in the composites.",
journal = "Acta Physica Polonica A",
title = "Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties",
volume = "117",
number = "5",
pages = "831-836",
doi = "10.12693%2FAPhysPolA.117.831",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6872"
}
Antić, Ž., Krsmanović, R., Marinović-Cincović, M.,& Dramićanin, M.. (2010). Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties. in Acta Physica Polonica A, 117(5), 831-836.
https://doi.org/10.12693%2FAPhysPolA.117.831
https://hdl.handle.net/21.15107/rcub_vinar_6872
Antić Ž, Krsmanović R, Marinović-Cincović M, Dramićanin M. Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties. in Acta Physica Polonica A. 2010;117(5):831-836.
doi:10.12693%2FAPhysPolA.117.831
https://hdl.handle.net/21.15107/rcub_vinar_6872 .
Antić, Željka, Krsmanović, Radenka, Marinović-Cincović, Milena, Dramićanin, Miroslav, "Gd2O3:Eu3+/PMMA Composite: Thermal and Luminescence Properties" in Acta Physica Polonica A, 117, no. 5 (2010):831-836,
https://doi.org/10.12693%2FAPhysPolA.117.831 .,
https://hdl.handle.net/21.15107/rcub_vinar_6872 .
5
9

Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis

Krsmanović, Radenka; Antić, Željka; Bartova, Barbora; Dramićanin, Miroslav

(2010)

TY  - JOUR
AU  - Krsmanović, Radenka
AU  - Antić, Željka
AU  - Bartova, Barbora
AU  - Dramićanin, Miroslav
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4088
AB  - We explored a synthesis route based on the polymer complex solution method for the production of the rare-earth doped Lu2O3 crystalline nanopowders. In this type of synthesis polyethylene glycol is used both as fuel for the combustion reaction, and as nucleation agent for the crystallization process. Synthesized materials were characterized with X-ray diffraction technique, scanning and transmission electron microscopy, EDX technique and photoluminescence spectroscopy with steady state and time domain measurements. X-ray diffraction and electron diffraction analysis showed that presented synthesis procedure yields pure-phase, well crystallized Lu2O3 nanopowders with the particles dimensions in the 30-50 nm range, as observed from TEM images. Luminescence properties of Sm3+ and Tb3+ doped Lu2O3 exhibited characteristic red and pseudo-white emissions from these rare-earth ions, with an average emission lifetime of 0.8 and 0.6 ms, respectively. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis
VL  - 505
IS  - 1
SP  - 224
EP  - 228
DO  - 10.1016/j.jallcom.2010.06.033
ER  - 
@article{
author = "Krsmanović, Radenka and Antić, Željka and Bartova, Barbora and Dramićanin, Miroslav",
year = "2010",
abstract = "We explored a synthesis route based on the polymer complex solution method for the production of the rare-earth doped Lu2O3 crystalline nanopowders. In this type of synthesis polyethylene glycol is used both as fuel for the combustion reaction, and as nucleation agent for the crystallization process. Synthesized materials were characterized with X-ray diffraction technique, scanning and transmission electron microscopy, EDX technique and photoluminescence spectroscopy with steady state and time domain measurements. X-ray diffraction and electron diffraction analysis showed that presented synthesis procedure yields pure-phase, well crystallized Lu2O3 nanopowders with the particles dimensions in the 30-50 nm range, as observed from TEM images. Luminescence properties of Sm3+ and Tb3+ doped Lu2O3 exhibited characteristic red and pseudo-white emissions from these rare-earth ions, with an average emission lifetime of 0.8 and 0.6 ms, respectively. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis",
volume = "505",
number = "1",
pages = "224-228",
doi = "10.1016/j.jallcom.2010.06.033"
}
Krsmanović, R., Antić, Ž., Bartova, B.,& Dramićanin, M.. (2010). Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis. in Journal of Alloys and Compounds, 505(1), 224-228.
https://doi.org/10.1016/j.jallcom.2010.06.033
Krsmanović R, Antić Ž, Bartova B, Dramićanin M. Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis. in Journal of Alloys and Compounds. 2010;505(1):224-228.
doi:10.1016/j.jallcom.2010.06.033 .
Krsmanović, Radenka, Antić, Željka, Bartova, Barbora, Dramićanin, Miroslav, "Characterization of rare-earth doped Lu2O3 nanopowders prepared with polymer complex solution synthesis" in Journal of Alloys and Compounds, 505, no. 1 (2010):224-228,
https://doi.org/10.1016/j.jallcom.2010.06.033 . .
32
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