TY  - JOUR
AU  - Medić, Mina M.
AU  - Antić, Željka
AU  - Đorđević, Vesna R.
AU  - Ahrenkiel, Scott Phillip
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/879
AB  - This work explores the influence of annealing temperature on the structure and luminescence of 2 at% Eu3+ and 1 at Sm3+-doped Mg2TiO4 nanopowders produced via Pechini-type polymerized complex route. Mg2TiO4 samples were annealed at 7 different temperatures (400 degrees C, 450 degrees C, 500 degrees C, 550 degrees C, 600 degrees C, 650 degrees C and 700 degrees C) to determine the temperature range in which cubic inverse spinel structure is stable and to follow the changes of material luminescence properties. X-ray diffraction revealed that crystallization of both Eu3+ and Sm3+-doped Mg2TiO4 nanopowders starts at 400 degrees C, and that Sm3+ doped Mg2TiO4 starts to decompose at 650 degrees C, while Eu3+ doped Mg2TiO4 starts to decompose at 700 degrees C. Samples annealed at higher temperatures show higher crystallinity and larger crystallite size. Mg2TiO4 powder annealed at 600 degrees C is composed of similar to 5 nm size nanoparticles agglomerated in micron-size and dense chunks. The emission spectra of nanoparticles are composed of emissions from defects in Mg2TiO4 host and characteristic emissions of Eu3+ (D-5(0) - GT F-7(J)) and Sm3+ ((4)G(5/2) - GT H-6(J)) ions. The stronger emission and longer emission decays are observed with samples annealed at high temperatures. In the case of the Eu3+ ions emission intensity increased one order of magnitude between samples annealed at 400 degrees C and 650 degrees C. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Luminescence
T1  - Effect of annealing on luminescence of Eu3+- and Sm3+-doped Mg2TiO4 nanoparticles
VL  - 170
IS  - SI
SP  - 679
EP  - 685
DO  - 10.1016/j.jlumin.2015.06.007
ER  - 

@article{
author = "Medić, Mina M. and Antić, Željka and Đorđević, Vesna R. and Ahrenkiel, Scott Phillip and Marinović-Cincović, Milena and Dramićanin, Miroslav",
year = "2016",
abstract = "This work explores the influence of annealing temperature on the structure and luminescence of 2 at% Eu3+ and 1 at Sm3+-doped Mg2TiO4 nanopowders produced via Pechini-type polymerized complex route. Mg2TiO4 samples were annealed at 7 different temperatures (400 degrees C, 450 degrees C, 500 degrees C, 550 degrees C, 600 degrees C, 650 degrees C and 700 degrees C) to determine the temperature range in which cubic inverse spinel structure is stable and to follow the changes of material luminescence properties. X-ray diffraction revealed that crystallization of both Eu3+ and Sm3+-doped Mg2TiO4 nanopowders starts at 400 degrees C, and that Sm3+ doped Mg2TiO4 starts to decompose at 650 degrees C, while Eu3+ doped Mg2TiO4 starts to decompose at 700 degrees C. Samples annealed at higher temperatures show higher crystallinity and larger crystallite size. Mg2TiO4 powder annealed at 600 degrees C is composed of similar to 5 nm size nanoparticles agglomerated in micron-size and dense chunks. The emission spectra of nanoparticles are composed of emissions from defects in Mg2TiO4 host and characteristic emissions of Eu3+ (D-5(0) - GT F-7(J)) and Sm3+ ((4)G(5/2) - GT H-6(J)) ions. The stronger emission and longer emission decays are observed with samples annealed at high temperatures. In the case of the Eu3+ ions emission intensity increased one order of magnitude between samples annealed at 400 degrees C and 650 degrees C. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Luminescence",
title = "Effect of annealing on luminescence of Eu3+- and Sm3+-doped Mg2TiO4 nanoparticles",
volume = "170",
number = "SI",
pages = "679-685",
doi = "10.1016/j.jlumin.2015.06.007"
}

Medić, M. M., Antić, Ž., Đorđević, V. R., Ahrenkiel, S. P., Marinović-Cincović, M.,& Dramićanin, M.. (2016). Effect of annealing on luminescence of Eu3+- and Sm3+-doped Mg2TiO4 nanoparticles. in Journal of Luminescence
Elsevier., 170(SI), 679-685.
https://doi.org/10.1016/j.jlumin.2015.06.007

Medić MM, Antić Ž, Đorđević VR, Ahrenkiel SP, Marinović-Cincović M, Dramićanin M. Effect of annealing on luminescence of Eu3+- and Sm3+-doped Mg2TiO4 nanoparticles. in Journal of Luminescence. 2016;170(SI):679-685.
doi:10.1016/j.jlumin.2015.06.007 .

Medić, Mina M., Antić, Željka, Đorđević, Vesna R., Ahrenkiel, Scott Phillip, Marinović-Cincović, Milena, Dramićanin, Miroslav, "Effect of annealing on luminescence of Eu3+- and Sm3+-doped Mg2TiO4 nanoparticles" in Journal of Luminescence, 170, no. SI (2016):679-685,
https://doi.org/10.1016/j.jlumin.2015.06.007 . .

TY  - JOUR
AU  - Lenhardt, Lea I.
AU  - Dramićanin, Miroslav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/831
AB  - Parallel factor analysis (PARAFAC) was demonstrated as a tool for the analysis of the time-resolved emission spectra of mixtures of rare-earth phosphors. The time-resolved luminescence spectra of mixtures of europium(III)-doped Gd2O3, Gd2Ti2O7, and GdVO4 powders were measured in the 570-650 nm emission range with time delays varying between 0 and 10 ms. Then, PARAFAC was applied to decompose the time-resolved spectra of the mixtures into the emission spectra and emission decay profiles of the individual phosphors. The second-order advantage of this method was demonstrated by calculating the concentrations of the phosphors in the mixtures after calibrating the PARAFAC model by using samples of known concentrations. This method offered 0.1% detection limit and an average prediction error of 0.034%. (C)) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Luminescence
T1  - PARAFAC: A tool for the analysis of phosphor mixture luminescence
VL  - 170
SP  - 136
EP  - 140
DO  - 10.1016/j.jlumin.2015.10.030
ER  - 

@article{
author = "Lenhardt, Lea I. and Dramićanin, Miroslav",
year = "2016",
abstract = "Parallel factor analysis (PARAFAC) was demonstrated as a tool for the analysis of the time-resolved emission spectra of mixtures of rare-earth phosphors. The time-resolved luminescence spectra of mixtures of europium(III)-doped Gd2O3, Gd2Ti2O7, and GdVO4 powders were measured in the 570-650 nm emission range with time delays varying between 0 and 10 ms. Then, PARAFAC was applied to decompose the time-resolved spectra of the mixtures into the emission spectra and emission decay profiles of the individual phosphors. The second-order advantage of this method was demonstrated by calculating the concentrations of the phosphors in the mixtures after calibrating the PARAFAC model by using samples of known concentrations. This method offered 0.1% detection limit and an average prediction error of 0.034%. (C)) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Luminescence",
title = "PARAFAC: A tool for the analysis of phosphor mixture luminescence",
volume = "170",
pages = "136-140",
doi = "10.1016/j.jlumin.2015.10.030"
}

Lenhardt, L. I.,& Dramićanin, M.. (2016). PARAFAC: A tool for the analysis of phosphor mixture luminescence. in Journal of Luminescence
Elsevier., 170, 136-140.
https://doi.org/10.1016/j.jlumin.2015.10.030

Lenhardt LI, Dramićanin M. PARAFAC: A tool for the analysis of phosphor mixture luminescence. in Journal of Luminescence. 2016;170:136-140.
doi:10.1016/j.jlumin.2015.10.030 .

Lenhardt, Lea I., Dramićanin, Miroslav, "PARAFAC: A tool for the analysis of phosphor mixture luminescence" in Journal of Luminescence, 170 (2016):136-140,
https://doi.org/10.1016/j.jlumin.2015.10.030 . .

TY  - JOUR
AU  - Vuković, Katarina
AU  - Medić, Mina M.
AU  - Sekulić, Milica
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/692
AB  - Eu3+ doped Mg-2 TiO4 (2 at% of Eu) nanoparticles which are 5 to 10 nm in diameter are prepared by Pechini-type polymerized complex route followed with the calcination in the temperature range from 400 degrees C to 700 degrees C. Emission spectra display characteristic D-5(0) - GT F-7(J) (J = 0, 1, 2, 3, and 4) spin forbidden f-f electronic transitions of the Eu3+ ions with the most pronounced emission coming from D-5(0) - GT F-7(2) transition and with the emission decays varying between 0.57 and 0.87ms for samples prepared at different temperatures. Judd-Ofelt theoretical analysis of the emission spectra of Eu3+ ions was performed, which allowed calculating radiative and nonradiative emission probabilities, Judd-Ofelt intensity parameters, and the quantum efficiency of the Eu3+ emission in the Mg-2 TiO4 nanoparticles. The analyses showed the existence of high asymmetry around the metal ion sites. Also, the largest quantum efficiency of emission of 58.5% is found in nanoparticles prepared at 600 degrees C.
T2  - Advances in Condensed Matter Physics
T1  - Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory
DO  - 10.1155/2015/736517
ER  - 

@article{
author = "Vuković, Katarina and Medić, Mina M. and Sekulić, Milica and Dramićanin, Miroslav",
year = "2015",
abstract = "Eu3+ doped Mg-2 TiO4 (2 at% of Eu) nanoparticles which are 5 to 10 nm in diameter are prepared by Pechini-type polymerized complex route followed with the calcination in the temperature range from 400 degrees C to 700 degrees C. Emission spectra display characteristic D-5(0) - GT F-7(J) (J = 0, 1, 2, 3, and 4) spin forbidden f-f electronic transitions of the Eu3+ ions with the most pronounced emission coming from D-5(0) - GT F-7(2) transition and with the emission decays varying between 0.57 and 0.87ms for samples prepared at different temperatures. Judd-Ofelt theoretical analysis of the emission spectra of Eu3+ ions was performed, which allowed calculating radiative and nonradiative emission probabilities, Judd-Ofelt intensity parameters, and the quantum efficiency of the Eu3+ emission in the Mg-2 TiO4 nanoparticles. The analyses showed the existence of high asymmetry around the metal ion sites. Also, the largest quantum efficiency of emission of 58.5% is found in nanoparticles prepared at 600 degrees C.",
journal = "Advances in Condensed Matter Physics",
title = "Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory",
doi = "10.1155/2015/736517"
}

Vuković, K., Medić, M. M., Sekulić, M.,& Dramićanin, M.. (2015). Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory. in Advances in Condensed Matter Physics.
https://doi.org/10.1155/2015/736517

Vuković K, Medić MM, Sekulić M, Dramićanin M. Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory. in Advances in Condensed Matter Physics. 2015;.
doi:10.1155/2015/736517 .

Vuković, Katarina, Medić, Mina M., Sekulić, Milica, Dramićanin, Miroslav, "Analysis of Eu3+ Emission from Mg2TiO4 Nanoparticles by Judd-Ofelt Theory" in Advances in Condensed Matter Physics (2015),
https://doi.org/10.1155/2015/736517 . .