TY  - JOUR
AU  - Antić, Željka
AU  - Racu, Andrei V.
AU  - Medić, Mina
AU  - Alodhayb, Abdullah N.
AU  - Kuzman, Sanja
AU  - Brik, Mikhail G.
AU  - Dramićanin, Miroslav
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/13020
AB  - La(PO3)3 activated with different concentrations of Pr3+ was synthesized by a solid-state process. The obtained powder was composed of chunks of several microns in size, typical for this type of synthesis. X-ray diffraction confirmed an orthorhombic crystal structure with the C2221 space group. The electronic band structures and density of states of La(PO3)3 and La(PO3)3:Pr3+ are calculated and presented. The visible and near-infrared emissions from Pr3+ [Xe]4f2 [Xe]4f2 electronic transitions were detected under 442 nm excitation. The red emission from the 1D2 state dominates visible spectra while emissions from the 3P0,1,2 states have smaller intensities. The 1D2 emission centered around 1020 nm is detected in the near-infrared spectral range. Intensities of 3P0 emissions increased with an increase in Pr concentration, while 1D2 emissions decreased in intensity. We found that the main process responsible for the 1D2 state decay is the Pr(1D2) + Pr(3H4) Pr(1G4) + Pr(3F3,4) cross-relaxation between two Pr ions of electric dipole-dipole character. This finding is supported by 1D2 emission decay measurements, which revealed a reduction of average decay constants from 242 μs for a 0.5 mol% doped sample to 11 μs for a 10 mol% doped sample and an increasingly stronger non-exponential behavior of emission decay patterns with an increase in Pr3+ concentration.
T2  - Optical Materials
T1  - Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3
VL  - 150
SP  - 115226
DO  - 10.1016/j.optmat.2024.115226
ER  - 

@article{
author = "Antić, Željka and Racu, Andrei V. and Medić, Mina and Alodhayb, Abdullah N. and Kuzman, Sanja and Brik, Mikhail G. and Dramićanin, Miroslav",
year = "2024",
abstract = "La(PO3)3 activated with different concentrations of Pr3+ was synthesized by a solid-state process. The obtained powder was composed of chunks of several microns in size, typical for this type of synthesis. X-ray diffraction confirmed an orthorhombic crystal structure with the C2221 space group. The electronic band structures and density of states of La(PO3)3 and La(PO3)3:Pr3+ are calculated and presented. The visible and near-infrared emissions from Pr3+ [Xe]4f2 [Xe]4f2 electronic transitions were detected under 442 nm excitation. The red emission from the 1D2 state dominates visible spectra while emissions from the 3P0,1,2 states have smaller intensities. The 1D2 emission centered around 1020 nm is detected in the near-infrared spectral range. Intensities of 3P0 emissions increased with an increase in Pr concentration, while 1D2 emissions decreased in intensity. We found that the main process responsible for the 1D2 state decay is the Pr(1D2) + Pr(3H4) Pr(1G4) + Pr(3F3,4) cross-relaxation between two Pr ions of electric dipole-dipole character. This finding is supported by 1D2 emission decay measurements, which revealed a reduction of average decay constants from 242 μs for a 0.5 mol% doped sample to 11 μs for a 10 mol% doped sample and an increasingly stronger non-exponential behavior of emission decay patterns with an increase in Pr3+ concentration.",
journal = "Optical Materials",
title = "Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3",
volume = "150",
pages = "115226",
doi = "10.1016/j.optmat.2024.115226"
}

Antić, Ž., Racu, A. V., Medić, M., Alodhayb, A. N., Kuzman, S., Brik, M. G.,& Dramićanin, M.. (2024). Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3. in Optical Materials, 150, 115226.
https://doi.org/10.1016/j.optmat.2024.115226

Antić Ž, Racu AV, Medić M, Alodhayb AN, Kuzman S, Brik MG, Dramićanin M. Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3. in Optical Materials. 2024;150:115226.
doi:10.1016/j.optmat.2024.115226 .

Antić, Željka, Racu, Andrei V., Medić, Mina, Alodhayb, Abdullah N., Kuzman, Sanja, Brik, Mikhail G., Dramićanin, Miroslav, "Concentration and temperature dependence of Pr3+ f-f emissions in La(PO3)3" in Optical Materials, 150 (2024):115226,
https://doi.org/10.1016/j.optmat.2024.115226 . .

TY  - JOUR
AU  - Đačanin-Far, Ljubica
AU  - Dramićanin, Tatjana
AU  - Medić, Mina
AU  - Ristić, Zoran
AU  - Periša, Jovana
AU  - Đorđević, Vesna
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2024
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12568
AB  - Herein, we demonstrate the photoluminescence properties of Dy3+-activated YNbO4, LuNbO4, and mixed YxLu1−xNbO4:Dy3+ (x=0.25, 0.5, 0.75) phosphors. For this purpose, fve samples with a fxed Dy3+ concentration (2 mol%) were prepared by the solid-state reaction method. X-ray difraction measurements showed that all phosphors crystallize in a monoclinic fergusonite-beta-(Y) structure with a C2/c space group. Scanning electron microscopy clearly shows that samples are composed of dense, well-developed micron-sized, cube-shaped grains with rounded edges. The photoluminescent emission spectra feature Dy3+ peaks at standard positions corresponding to transitions from the 4 F9/2 excited emitting level to the 6 HJ (J=15/2; 13/2; 11/2 and 9/2) lower levels with two dominant emission bands placed in the blue (~479 nm, B) and yellow (~576 nm, Y) spectral region. It is observed that with Lu increase in the host lattice Y/B ratio decreases toward the desired ratio of unity to obtain white light. To evaluate the suitability of these phosphors for use in solid-state lighting, their photoluminescence emission was analyzed in detail by calculating CIE coordinates, correlated color temperature (CCT) and Delta u,v (DUV). It is shown that CIE chromaticity coordinates of all Dy3+-activated YxLu1−xNbO4 samples (x=0, 0.25, 0.5, 0.75, and 1) fall into the white portion of the diagram and that with the increase of Lu in the host lattice color becomes whiter. CCT values for all samples are in the cooler 4000–4500 K range with positive DUVs indicating that color points are placed above the black body curve. The average lifetime of 4 F9/2 level is calculated to be~0.2 ms for all Dy3+-activated YxLu1−xNbO4 samples, indicating that there is no infuence of the Y-to-Lu ratio in the host niobate material on the luminescence kinetics.
T2  - Applied Physics A
T1  - Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors
VL  - 130
IS  - 2
SP  - 107
DO  - 10.1007/s00339-023-07271-z
ER  - 

@article{
author = "Đačanin-Far, Ljubica and Dramićanin, Tatjana and Medić, Mina and Ristić, Zoran and Periša, Jovana and Đorđević, Vesna and Antić, Željka and Dramićanin, Miroslav",
year = "2024",
abstract = "Herein, we demonstrate the photoluminescence properties of Dy3+-activated YNbO4, LuNbO4, and mixed YxLu1−xNbO4:Dy3+ (x=0.25, 0.5, 0.75) phosphors. For this purpose, fve samples with a fxed Dy3+ concentration (2 mol%) were prepared by the solid-state reaction method. X-ray difraction measurements showed that all phosphors crystallize in a monoclinic fergusonite-beta-(Y) structure with a C2/c space group. Scanning electron microscopy clearly shows that samples are composed of dense, well-developed micron-sized, cube-shaped grains with rounded edges. The photoluminescent emission spectra feature Dy3+ peaks at standard positions corresponding to transitions from the 4 F9/2 excited emitting level to the 6 HJ (J=15/2; 13/2; 11/2 and 9/2) lower levels with two dominant emission bands placed in the blue (~479 nm, B) and yellow (~576 nm, Y) spectral region. It is observed that with Lu increase in the host lattice Y/B ratio decreases toward the desired ratio of unity to obtain white light. To evaluate the suitability of these phosphors for use in solid-state lighting, their photoluminescence emission was analyzed in detail by calculating CIE coordinates, correlated color temperature (CCT) and Delta u,v (DUV). It is shown that CIE chromaticity coordinates of all Dy3+-activated YxLu1−xNbO4 samples (x=0, 0.25, 0.5, 0.75, and 1) fall into the white portion of the diagram and that with the increase of Lu in the host lattice color becomes whiter. CCT values for all samples are in the cooler 4000–4500 K range with positive DUVs indicating that color points are placed above the black body curve. The average lifetime of 4 F9/2 level is calculated to be~0.2 ms for all Dy3+-activated YxLu1−xNbO4 samples, indicating that there is no infuence of the Y-to-Lu ratio in the host niobate material on the luminescence kinetics.",
journal = "Applied Physics A",
title = "Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors",
volume = "130",
number = "2",
pages = "107",
doi = "10.1007/s00339-023-07271-z"
}

Đačanin-Far, L., Dramićanin, T., Medić, M., Ristić, Z., Periša, J., Đorđević, V., Antić, Ž.,& Dramićanin, M.. (2024). Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors. in Applied Physics A, 130(2), 107.
https://doi.org/10.1007/s00339-023-07271-z

Đačanin-Far L, Dramićanin T, Medić M, Ristić Z, Periša J, Đorđević V, Antić Ž, Dramićanin M. Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors. in Applied Physics A. 2024;130(2):107.
doi:10.1007/s00339-023-07271-z .

Đačanin-Far, Ljubica, Dramićanin, Tatjana, Medić, Mina, Ristić, Zoran, Periša, Jovana, Đorđević, Vesna, Antić, Željka, Dramićanin, Miroslav, "Emission color tunability of dysprosium-activated YNbO4–LuNbO4-mixed phosphors" in Applied Physics A, 130, no. 2 (2024):107,
https://doi.org/10.1007/s00339-023-07271-z . .

TY  - JOUR
AU  - Ristić, Zoran
AU  - Piotrowski, Wojciech
AU  - Medić, Mina M.
AU  - Periša, Jovana
AU  - Antić, Željka
AU  - Marciniak, Lukasz
AU  - Dramićanin, Miroslav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10225
AB  - This paper describes Mn5+-activated Sr3(PO4)2and Ba3(PO4)2phosphors as near-infrared lifetime-based luminescence thermometry probes. Materials were prepared by a solid-state method, and their rhombohedral structures were confirmed by X-ray diffraction analysis. Diffuse reflectance measurements showed broad and strong absorption between 650 and 950 nm covering the first biological transparency window and having an absorption maximum at ∼660 nm. By switching Sr with Ba, the following changes in the photoluminescent properties were observed: (i) a red shift of the emission maximum (1173 nm → 1191 nm) and (ii) a decrease in the excited-state lifetime. Thermometric properties of the phosphors were assessed by measuring and analyzing the temperature dependence of the Mn5+excited-state lifetime. Lifetime-based luminescence thermometry revealed a relative sensitivity of 0.5% K-1at 310 K (physiologically relevant range) and a maximal value of ∼1% K-1at temperatures between 400 and 500 K. © 2022 American Chemical Society.
T2  - ACS Applied Electronic Materials
T1  - Near-Infrared Luminescent Lifetime-Based Thermometry with Mn5+-Activated Sr3(PO4)2and Ba3(PO4)2Phosphors
VL  - 4
IS  - 3
SP  - 1057
EP  - 1062
DO  - 10.1021/acsaelm.1c01207
ER  - 

@article{
author = "Ristić, Zoran and Piotrowski, Wojciech and Medić, Mina M. and Periša, Jovana and Antić, Željka and Marciniak, Lukasz and Dramićanin, Miroslav",
year = "2022",
abstract = "This paper describes Mn5+-activated Sr3(PO4)2and Ba3(PO4)2phosphors as near-infrared lifetime-based luminescence thermometry probes. Materials were prepared by a solid-state method, and their rhombohedral structures were confirmed by X-ray diffraction analysis. Diffuse reflectance measurements showed broad and strong absorption between 650 and 950 nm covering the first biological transparency window and having an absorption maximum at ∼660 nm. By switching Sr with Ba, the following changes in the photoluminescent properties were observed: (i) a red shift of the emission maximum (1173 nm → 1191 nm) and (ii) a decrease in the excited-state lifetime. Thermometric properties of the phosphors were assessed by measuring and analyzing the temperature dependence of the Mn5+excited-state lifetime. Lifetime-based luminescence thermometry revealed a relative sensitivity of 0.5% K-1at 310 K (physiologically relevant range) and a maximal value of ∼1% K-1at temperatures between 400 and 500 K. © 2022 American Chemical Society.",
journal = "ACS Applied Electronic Materials",
title = "Near-Infrared Luminescent Lifetime-Based Thermometry with Mn5+-Activated Sr3(PO4)2and Ba3(PO4)2Phosphors",
volume = "4",
number = "3",
pages = "1057-1062",
doi = "10.1021/acsaelm.1c01207"
}

Ristić, Z., Piotrowski, W., Medić, M. M., Periša, J., Antić, Ž., Marciniak, L.,& Dramićanin, M.. (2022). Near-Infrared Luminescent Lifetime-Based Thermometry with Mn5+-Activated Sr3(PO4)2and Ba3(PO4)2Phosphors. in ACS Applied Electronic Materials, 4(3), 1057-1062.
https://doi.org/10.1021/acsaelm.1c01207

Ristić Z, Piotrowski W, Medić MM, Periša J, Antić Ž, Marciniak L, Dramićanin M. Near-Infrared Luminescent Lifetime-Based Thermometry with Mn5+-Activated Sr3(PO4)2and Ba3(PO4)2Phosphors. in ACS Applied Electronic Materials. 2022;4(3):1057-1062.
doi:10.1021/acsaelm.1c01207 .

Ristić, Zoran, Piotrowski, Wojciech, Medić, Mina M., Periša, Jovana, Antić, Željka, Marciniak, Lukasz, Dramićanin, Miroslav, "Near-Infrared Luminescent Lifetime-Based Thermometry with Mn5+-Activated Sr3(PO4)2and Ba3(PO4)2Phosphors" in ACS Applied Electronic Materials, 4, no. 3 (2022):1057-1062,
https://doi.org/10.1021/acsaelm.1c01207 . .

TY  - JOUR
AU  - Periša, Jovana
AU  - Đorđević, Vesna R.
AU  - Ristić, Zoran
AU  - Medić, Mina M.
AU  - Kuzman, Sanja
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10104
AB  - Potential of Eu3+, Mn4+ co-doped YAG for dual-activated luminescence intensity ratio thermometry is investigated. The samples were prepared by modified Pechini method and cubic structure confirmed by X-ray diffraction with average crystallite size of ∼ 20 nm. Scanning electron microscopy revealed different sized chunks composed of ellipsoidal-shaped particles bellow 50 nm. Temperature-dependent photoluminescent emission spectra (λex = 465 nm, 98–473 K temperature range) of co-doped samples consist of emission bands in the red spectral region originating from both Eu3+and Mn4+transitions. Concentration of Mn4+ and Eu3+ is optimized to be 0.5mol% and 3mol%. Observed suppression of Eu3+ emission indicate an efficient (∼97%) energy transfer from Eu3+ to Mn4+. Using luminescence intensity ratio as the ratio between the integrated intensities of the Eu3+ 5D0→7F1 transition and the Mn4+ 2E→4A2 manyfold, maximal absolute and relative sensitivities of SAmax = 19.2mK−1 at 351 K and SRmax = 5.06%K − 1 at 321 K were calculated.
T2  - Materials Research Bulletin
T1  - Highly sensitive temperature reading from intensity ratio of Eu3+ And Mn4+emissions in Y3Al5O12 nanocrystals
VL  - 149
SP  - 111708
DO  - 10.1016/j.materresbull.2021.111708
ER  - 

@article{
author = "Periša, Jovana and Đorđević, Vesna R. and Ristić, Zoran and Medić, Mina M. and Kuzman, Sanja and Antić, Željka and Dramićanin, Miroslav",
year = "2022",
abstract = "Potential of Eu3+, Mn4+ co-doped YAG for dual-activated luminescence intensity ratio thermometry is investigated. The samples were prepared by modified Pechini method and cubic structure confirmed by X-ray diffraction with average crystallite size of ∼ 20 nm. Scanning electron microscopy revealed different sized chunks composed of ellipsoidal-shaped particles bellow 50 nm. Temperature-dependent photoluminescent emission spectra (λex = 465 nm, 98–473 K temperature range) of co-doped samples consist of emission bands in the red spectral region originating from both Eu3+and Mn4+transitions. Concentration of Mn4+ and Eu3+ is optimized to be 0.5mol% and 3mol%. Observed suppression of Eu3+ emission indicate an efficient (∼97%) energy transfer from Eu3+ to Mn4+. Using luminescence intensity ratio as the ratio between the integrated intensities of the Eu3+ 5D0→7F1 transition and the Mn4+ 2E→4A2 manyfold, maximal absolute and relative sensitivities of SAmax = 19.2mK−1 at 351 K and SRmax = 5.06%K − 1 at 321 K were calculated.",
journal = "Materials Research Bulletin",
title = "Highly sensitive temperature reading from intensity ratio of Eu3+ And Mn4+emissions in Y3Al5O12 nanocrystals",
volume = "149",
pages = "111708",
doi = "10.1016/j.materresbull.2021.111708"
}

Periša, J., Đorđević, V. R., Ristić, Z., Medić, M. M., Kuzman, S., Antić, Ž.,& Dramićanin, M.. (2022). Highly sensitive temperature reading from intensity ratio of Eu3+ And Mn4+emissions in Y3Al5O12 nanocrystals. in Materials Research Bulletin, 149, 111708.
https://doi.org/10.1016/j.materresbull.2021.111708

Periša J, Đorđević VR, Ristić Z, Medić MM, Kuzman S, Antić Ž, Dramićanin M. Highly sensitive temperature reading from intensity ratio of Eu3+ And Mn4+emissions in Y3Al5O12 nanocrystals. in Materials Research Bulletin. 2022;149:111708.
doi:10.1016/j.materresbull.2021.111708 .

Periša, Jovana, Đorđević, Vesna R., Ristić, Zoran, Medić, Mina M., Kuzman, Sanja, Antić, Željka, Dramićanin, Miroslav, "Highly sensitive temperature reading from intensity ratio of Eu3+ And Mn4+emissions in Y3Al5O12 nanocrystals" in Materials Research Bulletin, 149 (2022):111708,
https://doi.org/10.1016/j.materresbull.2021.111708 . .

TY  - JOUR
AU  - Pavlović, Vera P.
AU  - Tošić, Dragana
AU  - Dojčilović, Radovan
AU  - Dudić, Duško
AU  - Dramićanin, Miroslav
AU  - Medić, Mina M.
AU  - McPherson, Michael M.
AU  - Pavlović, Vladimir B.
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9563
AB  - Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors
T2  - Polymer Testing
T1  - PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix
VL  - 96
SP  - 107093
DO  - 10.1016/j.polymertesting.2021.107093
ER  - 

@article{
author = "Pavlović, Vera P. and Tošić, Dragana and Dojčilović, Radovan and Dudić, Duško and Dramićanin, Miroslav and Medić, Mina M. and McPherson, Michael M. and Pavlović, Vladimir B. and Vlahović, Branislav and Đoković, Vladimir",
year = "2021",
abstract = "Na0.25K0.25Bi0.5TiO3 (NKBT) perovskite particles are synthesized by solid-state method and used as a filler for polyvinylidene fluoride-co-hexafluoropropylene (PVDF-HFP) co-polymer. X-ray diffraction analysis of NKBT powders shows that the particles have a rhombohedral perovskite crystal structure (R3c symmetry). Raman spectroscopy reveals that the co-polymer crystallizes predominantly into the mixture of polar β- and γ-crystals, while there is also a contribution of the non-polar α-crystal phase. The introduction of the NKBT into the PVDF-HFP results with an increase in effective dielectric permittivity and this effect depends on the inorganic content in the composite. The most interesting result of the present study is that the introduction of NKBT particles induces the appearance of an additional transition peak in the dielectric spectra of the co-polymer matrix. At the fixed frequency of ~2 kHz, the observed process appears at ~10 °C (about 45° above the glass transition temperature) and its magnitude strongly depends on the amount of the NKBT in the composite. Dielectric spectroscopy measurements of the composites are carried out in the wide range of frequencies (from 0.1 Hz to 1 MHz) and temperatures (from −100 to 100 °C). They reveal that the novel process can be clearly distinguished in the frequency range between 160 Hz and ~50 kHz. © 2021 The Authors",
journal = "Polymer Testing",
title = "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix",
volume = "96",
pages = "107093",
doi = "10.1016/j.polymertesting.2021.107093"
}

Pavlović, V. P., Tošić, D., Dojčilović, R., Dudić, D., Dramićanin, M., Medić, M. M., McPherson, M. M., Pavlović, V. B., Vlahović, B.,& Đoković, V.. (2021). PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing, 96, 107093.
https://doi.org/10.1016/j.polymertesting.2021.107093

Pavlović VP, Tošić D, Dojčilović R, Dudić D, Dramićanin M, Medić MM, McPherson MM, Pavlović VB, Vlahović B, Đoković V. PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix. in Polymer Testing. 2021;96:107093.
doi:10.1016/j.polymertesting.2021.107093 .

Pavlović, Vera P., Tošić, Dragana, Dojčilović, Radovan, Dudić, Duško, Dramićanin, Miroslav, Medić, Mina M., McPherson, Michael M., Pavlović, Vladimir B., Vlahović, Branislav, Đoković, Vladimir, "PVDF-HFP/NKBT composite dielectrics: Perovskite particles induce the appearance of an additional dielectric relaxation process in ferroelectric polymer matrix" in Polymer Testing, 96 (2021):107093,
https://doi.org/10.1016/j.polymertesting.2021.107093 . .

TY  - JOUR
AU  - Ristić, Zoran
AU  - Đorđević, Vesna R.
AU  - Medić, Mina M.
AU  - Kuzman, Sanja
AU  - Brik, Mikhail G.
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9910
AB  - This paper presents the Cr3+-activated Mg2TiO4 phosphor temperature dependance of its near infrared luminescence and its potential in the optical thermometry applications. In this respect, temperature dependences of three emission features were tested over the broad temperature range (10–500 K): (i) the luminescence intensity ratio (LIR) between emissions from 4T2→4A2 and 2E→4A2 transitions, (ii) the emission lifetime, and (iii) the shift of the 2E→4A2 emission band. We observed that LIR follows the Boltzmann equation for T > 300 K with the maximal value of relative sensitivity of 1.73 %K−1. The lifetime value of the 2E→4A2 transition strongly decreases with temperature with a maximal relative sensitivity of about 0.75 %K−1 at around 430K. Finally, the shift of the emission band is about 65 cm−1 over the complete temperature range.
T2  - Optical Materials
T1  - Temperature dependence of the Cr3+-DOPED Mg2TiO4 near-infrared emission
VL  - 120
SP  - 111468
DO  - 10.1016/j.optmat.2021.111468
ER  - 

@article{
author = "Ristić, Zoran and Đorđević, Vesna R. and Medić, Mina M. and Kuzman, Sanja and Brik, Mikhail G. and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "This paper presents the Cr3+-activated Mg2TiO4 phosphor temperature dependance of its near infrared luminescence and its potential in the optical thermometry applications. In this respect, temperature dependences of three emission features were tested over the broad temperature range (10–500 K): (i) the luminescence intensity ratio (LIR) between emissions from 4T2→4A2 and 2E→4A2 transitions, (ii) the emission lifetime, and (iii) the shift of the 2E→4A2 emission band. We observed that LIR follows the Boltzmann equation for T > 300 K with the maximal value of relative sensitivity of 1.73 %K−1. The lifetime value of the 2E→4A2 transition strongly decreases with temperature with a maximal relative sensitivity of about 0.75 %K−1 at around 430K. Finally, the shift of the emission band is about 65 cm−1 over the complete temperature range.",
journal = "Optical Materials",
title = "Temperature dependence of the Cr3+-DOPED Mg2TiO4 near-infrared emission",
volume = "120",
pages = "111468",
doi = "10.1016/j.optmat.2021.111468"
}

Ristić, Z., Đorđević, V. R., Medić, M. M., Kuzman, S., Brik, M. G., Antić, Ž.,& Dramićanin, M.. (2021). Temperature dependence of the Cr3+-DOPED Mg2TiO4 near-infrared emission. in Optical Materials, 120, 111468.
https://doi.org/10.1016/j.optmat.2021.111468

Ristić Z, Đorđević VR, Medić MM, Kuzman S, Brik MG, Antić Ž, Dramićanin M. Temperature dependence of the Cr3+-DOPED Mg2TiO4 near-infrared emission. in Optical Materials. 2021;120:111468.
doi:10.1016/j.optmat.2021.111468 .

Ristić, Zoran, Đorđević, Vesna R., Medić, Mina M., Kuzman, Sanja, Brik, Mikhail G., Antić, Željka, Dramićanin, Miroslav, "Temperature dependence of the Cr3+-DOPED Mg2TiO4 near-infrared emission" in Optical Materials, 120 (2021):111468,
https://doi.org/10.1016/j.optmat.2021.111468 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Periša, Jovana
AU  - Medić, Mina M.
AU  - Kuzman, Sanja
AU  - Ristić, Zoran
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9907
AB  - The luminescence thermometry based on the intensity ratio of Cr3+ and host emissions in the Cr3+ activated MgTiO3 phosphor powder is demonstrated over the 100–350 K temperature range. Phosphor was prepared by a two-step procedure based on the sol-gel and molten salt methods. Rhombohedral crystal structure of the material is confirmed by X-ray diffraction analysis, and the mean crystallite size of the powder was calculated to be ~ 32 nm. Morphology was investigated using scanning electron microscopy showing ellipsoidal, densely packed grains with 100 nm–150 nm average size. Photoluminescence emission spectra recorded under 385 nm excitation showed the broad host emission centered at ~ 485 nm and the Cr3+ emission around ~ 700 nm. The temperature-dependent emission spectra showed that host-emission intensity is almost temperature invariant, while the intensity of the Cr3+ emission rapidly decreases from 200 K to 350 K. Such behavior theoretically modelled and further applied for the ratiometric luminescence temperature sensing showed the maximal relative sensitivity of ~ 2.6% K-1, temperature resolution of 0.3 K, and excellent repeatability.
T2  - Ceramics International
T1  - Sensitive temperature reading from intensity ratio of Cr3+ and defects’ emissions in MgTiO3:Cr3+
VL  - 47
IS  - 22
SP  - 31915
EP  - 31919
DO  - 10.1016/j.ceramint.2021.08.077
ER  - 

@article{
author = "Ćirić, Aleksandar and Periša, Jovana and Medić, Mina M. and Kuzman, Sanja and Ristić, Zoran and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "The luminescence thermometry based on the intensity ratio of Cr3+ and host emissions in the Cr3+ activated MgTiO3 phosphor powder is demonstrated over the 100–350 K temperature range. Phosphor was prepared by a two-step procedure based on the sol-gel and molten salt methods. Rhombohedral crystal structure of the material is confirmed by X-ray diffraction analysis, and the mean crystallite size of the powder was calculated to be ~ 32 nm. Morphology was investigated using scanning electron microscopy showing ellipsoidal, densely packed grains with 100 nm–150 nm average size. Photoluminescence emission spectra recorded under 385 nm excitation showed the broad host emission centered at ~ 485 nm and the Cr3+ emission around ~ 700 nm. The temperature-dependent emission spectra showed that host-emission intensity is almost temperature invariant, while the intensity of the Cr3+ emission rapidly decreases from 200 K to 350 K. Such behavior theoretically modelled and further applied for the ratiometric luminescence temperature sensing showed the maximal relative sensitivity of ~ 2.6% K-1, temperature resolution of 0.3 K, and excellent repeatability.",
journal = "Ceramics International",
title = "Sensitive temperature reading from intensity ratio of Cr3+ and defects’ emissions in MgTiO3:Cr3+",
volume = "47",
number = "22",
pages = "31915-31919",
doi = "10.1016/j.ceramint.2021.08.077"
}

Ćirić, A., Periša, J., Medić, M. M., Kuzman, S., Ristić, Z., Antić, Ž.,& Dramićanin, M.. (2021). Sensitive temperature reading from intensity ratio of Cr3+ and defects’ emissions in MgTiO3:Cr3+. in Ceramics International, 47(22), 31915-31919.
https://doi.org/10.1016/j.ceramint.2021.08.077

Ćirić A, Periša J, Medić MM, Kuzman S, Ristić Z, Antić Ž, Dramićanin M. Sensitive temperature reading from intensity ratio of Cr3+ and defects’ emissions in MgTiO3:Cr3+. in Ceramics International. 2021;47(22):31915-31919.
doi:10.1016/j.ceramint.2021.08.077 .

Ćirić, Aleksandar, Periša, Jovana, Medić, Mina M., Kuzman, Sanja, Ristić, Zoran, Antić, Željka, Dramićanin, Miroslav, "Sensitive temperature reading from intensity ratio of Cr3+ and defects’ emissions in MgTiO3:Cr3+" in Ceramics International, 47, no. 22 (2021):31915-31919,
https://doi.org/10.1016/j.ceramint.2021.08.077 . .

TY  - JOUR
AU  - Ristić, Zoran
AU  - Đorđević, Vesna R.
AU  - Medić, Mina M.
AU  - Kuzman, Sanja
AU  - Sekulić, Milica
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9624
AB  - Cr3+-doped Mg2SiO4 orthorhombic nanoparticles are synthesized by a combustion method. The 3d3 electron configuration of the Cr3+ ion results in the deep-red emission from optical transitions between d-d orbitals. Two overlapping emissions from the Cr3+ spin-forbidden 2Eg→ 4A2g and the spin-allowed 4T2g→ 4A2g electronic transitions are influenced by the strong crystal field in Mg2SiO4 and, thus, are suitable for ratiometric luminescence thermometry. The temperature-induced changes in Cr3+-doped Mg2SiO4 emission are tested for use in luminescence thermometry from cryogenic to physiologically relevant temperatures (10-350 K) by three approaches: (a) temperature-induced changes of emission intensity; (b) temperature-dependent luminescence lifetime; and (c) temperature-induced changes of emission band position. The second approach offers applicable thermometry at cryogenic temperatures, starting from temperatures as low as 50 K, while all three approaches offer applicable thermometry at physiologically relevant temperatures with relative sensitivities of 0.7% K-1 for emission intensity, 0.8% K-1 for lifetime and 0.85% K-1 for band position at 310 K. © 2021 IOP Publishing Ltd.
T2  - Measurement Science and Technology
T1  - Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures
VL  - 32
IS  - 5
SP  - 054004
DO  - 10.1088/1361-6501/abdc9a
ER  - 

@article{
author = "Ristić, Zoran and Đorđević, Vesna R. and Medić, Mina M. and Kuzman, Sanja and Sekulić, Milica and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "Cr3+-doped Mg2SiO4 orthorhombic nanoparticles are synthesized by a combustion method. The 3d3 electron configuration of the Cr3+ ion results in the deep-red emission from optical transitions between d-d orbitals. Two overlapping emissions from the Cr3+ spin-forbidden 2Eg→ 4A2g and the spin-allowed 4T2g→ 4A2g electronic transitions are influenced by the strong crystal field in Mg2SiO4 and, thus, are suitable for ratiometric luminescence thermometry. The temperature-induced changes in Cr3+-doped Mg2SiO4 emission are tested for use in luminescence thermometry from cryogenic to physiologically relevant temperatures (10-350 K) by three approaches: (a) temperature-induced changes of emission intensity; (b) temperature-dependent luminescence lifetime; and (c) temperature-induced changes of emission band position. The second approach offers applicable thermometry at cryogenic temperatures, starting from temperatures as low as 50 K, while all three approaches offer applicable thermometry at physiologically relevant temperatures with relative sensitivities of 0.7% K-1 for emission intensity, 0.8% K-1 for lifetime and 0.85% K-1 for band position at 310 K. © 2021 IOP Publishing Ltd.",
journal = "Measurement Science and Technology",
title = "Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures",
volume = "32",
number = "5",
pages = "054004",
doi = "10.1088/1361-6501/abdc9a"
}

Ristić, Z., Đorđević, V. R., Medić, M. M., Kuzman, S., Sekulić, M., Antić, Ž.,& Dramićanin, M.. (2021). Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures. in Measurement Science and Technology, 32(5), 054004.
https://doi.org/10.1088/1361-6501/abdc9a

Ristić Z, Đorđević VR, Medić MM, Kuzman S, Sekulić M, Antić Ž, Dramićanin M. Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures. in Measurement Science and Technology. 2021;32(5):054004.
doi:10.1088/1361-6501/abdc9a .

Ristić, Zoran, Đorđević, Vesna R., Medić, Mina M., Kuzman, Sanja, Sekulić, Milica, Antić, Željka, Dramićanin, Miroslav, "Triple-temperature readout in luminescence thermometry with Cr3+-doped Mg2SiO4 operating from cryogenic to physiologically relevant temperatures" in Measurement Science and Technology, 32, no. 5 (2021):054004,
https://doi.org/10.1088/1361-6501/abdc9a . .

TY  - JOUR
AU  - Marković, Zoran M.
AU  - Labudová, Martina
AU  - Danko, Martin
AU  - Matijašević, Danka
AU  - Mičušík, Matej
AU  - Nádaždy, Vojtech
AU  - Kováčová, Mária
AU  - Kleinová, Angela
AU  - Špitalský, Zdeno
AU  - Pavlović, Vladimir B.
AU  - Milivojević, Dušan
AU  - Medić, Mina M.
AU  - Todorović-Marković, Biljana
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9733
AB  - The addition of heteroatoms to pristine carbon quantum dots (CQDs) change their structure and optical properties. In this study, fluorine (F)- and chlorine (Cl)-doped CQDs are prepared by the one-step green hydrothermal route from sodium fluoride, sodium chloride, urea, and citric acid as the starting precursors. Microscopy analysis reveals that the average size of these quantum dots is 5 ± 2 nm, whereas the chemical study shows the existence of C–F and C–Cl bonds. The produced F- and Cl-doped CQDs have fluorescence quantum yields of 0.151 and 0.284, respectively, at an excitation wavelength of 450 nm. Charge transfer resistance of F- and Cl-doped CQDs films is 2 orders of magnitude higher than in the pristine CQD films. Transport band gap of the doped CQDs is 2 eV bigger than that of pristine CQDs. Radical scavenging activity shows very good antioxidant activity of doped CQDs. Antibacterial testing reveals poor antibacterial activity against Staphylococcus aureus and Escherichia coli. The F- and Cl-doped CQDs are successfully used as fluorescent probes for cell imaging as shown by confocal microscopy.
T2  - ACS Sustainable Chemistry and Engineering
T1  - Highly Efficient Antioxidant F- and Cl-Doped Carbon Quantum Dots for Bioimaging
VL  - 8
IS  - 43
SP  - 16327
EP  - 16338
DO  - 10.1021/acssuschemeng.0c06260
ER  - 

@article{
author = "Marković, Zoran M. and Labudová, Martina and Danko, Martin and Matijašević, Danka and Mičušík, Matej and Nádaždy, Vojtech and Kováčová, Mária and Kleinová, Angela and Špitalský, Zdeno and Pavlović, Vladimir B. and Milivojević, Dušan and Medić, Mina M. and Todorović-Marković, Biljana",
year = "2020",
abstract = "The addition of heteroatoms to pristine carbon quantum dots (CQDs) change their structure and optical properties. In this study, fluorine (F)- and chlorine (Cl)-doped CQDs are prepared by the one-step green hydrothermal route from sodium fluoride, sodium chloride, urea, and citric acid as the starting precursors. Microscopy analysis reveals that the average size of these quantum dots is 5 ± 2 nm, whereas the chemical study shows the existence of C–F and C–Cl bonds. The produced F- and Cl-doped CQDs have fluorescence quantum yields of 0.151 and 0.284, respectively, at an excitation wavelength of 450 nm. Charge transfer resistance of F- and Cl-doped CQDs films is 2 orders of magnitude higher than in the pristine CQD films. Transport band gap of the doped CQDs is 2 eV bigger than that of pristine CQDs. Radical scavenging activity shows very good antioxidant activity of doped CQDs. Antibacterial testing reveals poor antibacterial activity against Staphylococcus aureus and Escherichia coli. The F- and Cl-doped CQDs are successfully used as fluorescent probes for cell imaging as shown by confocal microscopy.",
journal = "ACS Sustainable Chemistry and Engineering",
title = "Highly Efficient Antioxidant F- and Cl-Doped Carbon Quantum Dots for Bioimaging",
volume = "8",
number = "43",
pages = "16327-16338",
doi = "10.1021/acssuschemeng.0c06260"
}

Marković, Z. M., Labudová, M., Danko, M., Matijašević, D., Mičušík, M., Nádaždy, V., Kováčová, M., Kleinová, A., Špitalský, Z., Pavlović, V. B., Milivojević, D., Medić, M. M.,& Todorović-Marković, B.. (2020). Highly Efficient Antioxidant F- and Cl-Doped Carbon Quantum Dots for Bioimaging. in ACS Sustainable Chemistry and Engineering, 8(43), 16327-16338.
https://doi.org/10.1021/acssuschemeng.0c06260

Marković ZM, Labudová M, Danko M, Matijašević D, Mičušík M, Nádaždy V, Kováčová M, Kleinová A, Špitalský Z, Pavlović VB, Milivojević D, Medić MM, Todorović-Marković B. Highly Efficient Antioxidant F- and Cl-Doped Carbon Quantum Dots for Bioimaging. in ACS Sustainable Chemistry and Engineering. 2020;8(43):16327-16338.
doi:10.1021/acssuschemeng.0c06260 .

Marković, Zoran M., Labudová, Martina, Danko, Martin, Matijašević, Danka, Mičušík, Matej, Nádaždy, Vojtech, Kováčová, Mária, Kleinová, Angela, Špitalský, Zdeno, Pavlović, Vladimir B., Milivojević, Dušan, Medić, Mina M., Todorović-Marković, Biljana, "Highly Efficient Antioxidant F- and Cl-Doped Carbon Quantum Dots for Bioimaging" in ACS Sustainable Chemistry and Engineering, 8, no. 43 (2020):16327-16338,
https://doi.org/10.1021/acssuschemeng.0c06260 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Aleksić, Jelena
AU  - Barudžija, Tanja
AU  - Antić, Željka
AU  - Đorđević, Vesna R.
AU  - Medić, Mina M.
AU  - Periša, Jovana
AU  - Zeković, Ivana Lj.
AU  - Mitrić, Miodrag
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8938
AB  - The emission of Er3+ provides three combinations of emission bands suitable for ratiometric luminescence thermometry. Two combinations utilize ratios of visible emissions (2H11/2→4I15/2 at 523 nm/ 4S3/2→4I15/2 at 542 nm and 4F7/2→4I15/2 at 485 nm/ 4S3/2→4I15/2 at 545 nm), while emissions from the third combination are located in near-infrared, e.g., in the first biological window (2H11/2→4I13/2 at 793 nm/ 4S3/2→4I13/2 at 840 nm). Herein, we aimed to compare thermometric performances of these three different ratiometric readouts on account of their relative sensitivities, resolutions, and repeatability of measurements. For this aim, we prepared Yb3+,Er3+:YF3 nanopowders by oxide fluorination. The structure of the materials was confirmed by X-ray diffraction analysis and particle morphology was evaluated from FE-SEM measurements. Upconversion emission spectra were measured over the 293–473 K range upon excitation by 980 nm radiation. The obtained relative sensitivities on temperature for 523/542, 485/542, and 793/840 emission intensity ratios were 1.06 ± 0.02, 2.03 ± 0.23, and 0.98 ± 0.10%K−1 with temperature resolutions of 0.3, 0.7, and 1.8 K, respectively. The study showed that the higher relative temperature sensitivity does not necessarily lead to the more precise temperature measurement and better resolution, since it may be compromised by a larger uncertainty in measurement of low-intensity emission bands.
T2  - Nanomaterials
T1  - Comparison of Three Ratiometric Temperature Readings from the Er3+ Upconversion Emission
VL  - 10
IS  - 4
SP  - 627
DO  - 10.3390/nano10040627
ER  - 

@article{
author = "Ćirić, Aleksandar and Aleksić, Jelena and Barudžija, Tanja and Antić, Željka and Đorđević, Vesna R. and Medić, Mina M. and Periša, Jovana and Zeković, Ivana Lj. and Mitrić, Miodrag and Dramićanin, Miroslav",
year = "2020",
abstract = "The emission of Er3+ provides three combinations of emission bands suitable for ratiometric luminescence thermometry. Two combinations utilize ratios of visible emissions (2H11/2→4I15/2 at 523 nm/ 4S3/2→4I15/2 at 542 nm and 4F7/2→4I15/2 at 485 nm/ 4S3/2→4I15/2 at 545 nm), while emissions from the third combination are located in near-infrared, e.g., in the first biological window (2H11/2→4I13/2 at 793 nm/ 4S3/2→4I13/2 at 840 nm). Herein, we aimed to compare thermometric performances of these three different ratiometric readouts on account of their relative sensitivities, resolutions, and repeatability of measurements. For this aim, we prepared Yb3+,Er3+:YF3 nanopowders by oxide fluorination. The structure of the materials was confirmed by X-ray diffraction analysis and particle morphology was evaluated from FE-SEM measurements. Upconversion emission spectra were measured over the 293–473 K range upon excitation by 980 nm radiation. The obtained relative sensitivities on temperature for 523/542, 485/542, and 793/840 emission intensity ratios were 1.06 ± 0.02, 2.03 ± 0.23, and 0.98 ± 0.10%K−1 with temperature resolutions of 0.3, 0.7, and 1.8 K, respectively. The study showed that the higher relative temperature sensitivity does not necessarily lead to the more precise temperature measurement and better resolution, since it may be compromised by a larger uncertainty in measurement of low-intensity emission bands.",
journal = "Nanomaterials",
title = "Comparison of Three Ratiometric Temperature Readings from the Er3+ Upconversion Emission",
volume = "10",
number = "4",
pages = "627",
doi = "10.3390/nano10040627"
}

Ćirić, A., Aleksić, J., Barudžija, T., Antić, Ž., Đorđević, V. R., Medić, M. M., Periša, J., Zeković, I. Lj., Mitrić, M.,& Dramićanin, M.. (2020). Comparison of Three Ratiometric Temperature Readings from the Er3+ Upconversion Emission. in Nanomaterials, 10(4), 627.
https://doi.org/10.3390/nano10040627

Ćirić A, Aleksić J, Barudžija T, Antić Ž, Đorđević VR, Medić MM, Periša J, Zeković IL, Mitrić M, Dramićanin M. Comparison of Three Ratiometric Temperature Readings from the Er3+ Upconversion Emission. in Nanomaterials. 2020;10(4):627.
doi:10.3390/nano10040627 .

Ćirić, Aleksandar, Aleksić, Jelena, Barudžija, Tanja, Antić, Željka, Đorđević, Vesna R., Medić, Mina M., Periša, Jovana, Zeković, Ivana Lj., Mitrić, Miodrag, Dramićanin, Miroslav, "Comparison of Three Ratiometric Temperature Readings from the Er3+ Upconversion Emission" in Nanomaterials, 10, no. 4 (2020):627,
https://doi.org/10.3390/nano10040627 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Zeković, Ivana Lj.
AU  - Medić, Mina M.
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9004
AB  - The Judd-Ofelt model, already verified for the luminescence intensity ratio (also called fluorescence intensity ratio, FIR) thermometry from the emission spectra, is modified and tested for the dual-excited single band luminescence thermometry. The adapted model has been tested on Lu2O3:Eu3+, with a 99.9% match of the temperature invariant parameter to the experimental value. The absolute sensitivity obtained experimentally and predicted by the model are almost indistinguishable. The model is proven to be adequate for inaugural phosphor quality evaluation, as it can reveal the approximate figures of merit of luminescence thermometry solely from the single emission spectrum.
T2  - Journal of Luminescence
T1  - Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry
VL  - 225
SP  - 117369
DO  - 10.1016/j.jlumin.2020.117369
ER  - 

@article{
author = "Ćirić, Aleksandar and Zeković, Ivana Lj. and Medić, Mina M. and Antić, Željka and Dramićanin, Miroslav",
year = "2020",
abstract = "The Judd-Ofelt model, already verified for the luminescence intensity ratio (also called fluorescence intensity ratio, FIR) thermometry from the emission spectra, is modified and tested for the dual-excited single band luminescence thermometry. The adapted model has been tested on Lu2O3:Eu3+, with a 99.9% match of the temperature invariant parameter to the experimental value. The absolute sensitivity obtained experimentally and predicted by the model are almost indistinguishable. The model is proven to be adequate for inaugural phosphor quality evaluation, as it can reveal the approximate figures of merit of luminescence thermometry solely from the single emission spectrum.",
journal = "Journal of Luminescence",
title = "Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry",
volume = "225",
pages = "117369",
doi = "10.1016/j.jlumin.2020.117369"
}

Ćirić, A., Zeković, I. Lj., Medić, M. M., Antić, Ž.,& Dramićanin, M.. (2020). Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry. in Journal of Luminescence, 225, 117369.
https://doi.org/10.1016/j.jlumin.2020.117369

Ćirić A, Zeković IL, Medić MM, Antić Ž, Dramićanin M. Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry. in Journal of Luminescence. 2020;225:117369.
doi:10.1016/j.jlumin.2020.117369 .

Ćirić, Aleksandar, Zeković, Ivana Lj., Medić, Mina M., Antić, Željka, Dramićanin, Miroslav, "Judd-Ofelt modelling of the dual-excited single band ratiometric luminescence thermometry" in Journal of Luminescence, 225 (2020):117369,
https://doi.org/10.1016/j.jlumin.2020.117369 . .

TY  - JOUR
AU  - Kuzman, Sanja
AU  - Medić, Mina M.
AU  - Đorđević, Vesna R.
AU  - Zeković, Ivana Lj.
AU  - Ristić, Zoran
AU  - Đačanin Far, Ljubica
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8936
AB  - When activated by Dy3+, Na0.25K0.25Bi0.50TiO3 (NKBT), piezoelectric powders show strong luminescence in the blue and yellow spectral range. Emissions of this material can be effectively utilized for both luminescence intensity ratio and lifetime-based readouts of temperature. Photoluminescence measurements over a temperature range of 293–483 K show that the luminescence intensity ratio temperature readout has maximal relative sensitivity of 1.93% K−1 at 380 K, while the relative sensitivity of the lifetime temperature readout reaches 1.1% K−1 at 480 K. For this study, materials were synthesized by a solid-state reaction using TiO2, Bi2O3, Na2CO3, K2CO3 and Dy2O3 as precursors. X-ray diffraction measurements showed that the NKBT sample crystallized in the A-site substituted distorted perovskite rhombohedral structure (R3c symmetry). The photoluminescence spectra showed characteristic emission bands of Dy3+ ions centered at 457 nm (4I15/2 → 6H15/2), 478 nm (4F9/2 → 6H15/2), 574 nm (4F9/2 → 6H13/2) and 663 nm (4F9/2 → 6H11/2). The ratio of emissions from 4F9/2 and 4I15/2 excited states to the 6H15/2 ground state was used as a luminescence intensity ratio indicator of temperature, while the decay of emission from 4F9/2 → 6H13/2 transition was used as a lifetime indicator of temperature. CIE coordinates x = 0.326 and y = 0.361 calculated from room temperature emission spectra show the perspective of this material for use in white light emission devices.
T2  - Journal of Electronic Materials
T1  - Luminescence Thermometry Using Dy3+-Activated Na0.25K0.25Bi0.5TiO3 Powders
VL  - 49
IS  - 6
SP  - 4002
EP  - 4009
DO  - 10.1007/s11664-020-08109-7
ER  - 

@article{
author = "Kuzman, Sanja and Medić, Mina M. and Đorđević, Vesna R. and Zeković, Ivana Lj. and Ristić, Zoran and Đačanin Far, Ljubica and Dramićanin, Miroslav",
year = "2020",
abstract = "When activated by Dy3+, Na0.25K0.25Bi0.50TiO3 (NKBT), piezoelectric powders show strong luminescence in the blue and yellow spectral range. Emissions of this material can be effectively utilized for both luminescence intensity ratio and lifetime-based readouts of temperature. Photoluminescence measurements over a temperature range of 293–483 K show that the luminescence intensity ratio temperature readout has maximal relative sensitivity of 1.93% K−1 at 380 K, while the relative sensitivity of the lifetime temperature readout reaches 1.1% K−1 at 480 K. For this study, materials were synthesized by a solid-state reaction using TiO2, Bi2O3, Na2CO3, K2CO3 and Dy2O3 as precursors. X-ray diffraction measurements showed that the NKBT sample crystallized in the A-site substituted distorted perovskite rhombohedral structure (R3c symmetry). The photoluminescence spectra showed characteristic emission bands of Dy3+ ions centered at 457 nm (4I15/2 → 6H15/2), 478 nm (4F9/2 → 6H15/2), 574 nm (4F9/2 → 6H13/2) and 663 nm (4F9/2 → 6H11/2). The ratio of emissions from 4F9/2 and 4I15/2 excited states to the 6H15/2 ground state was used as a luminescence intensity ratio indicator of temperature, while the decay of emission from 4F9/2 → 6H13/2 transition was used as a lifetime indicator of temperature. CIE coordinates x = 0.326 and y = 0.361 calculated from room temperature emission spectra show the perspective of this material for use in white light emission devices.",
journal = "Journal of Electronic Materials",
title = "Luminescence Thermometry Using Dy3+-Activated Na0.25K0.25Bi0.5TiO3 Powders",
volume = "49",
number = "6",
pages = "4002-4009",
doi = "10.1007/s11664-020-08109-7"
}

Kuzman, S., Medić, M. M., Đorđević, V. R., Zeković, I. Lj., Ristić, Z., Đačanin Far, L.,& Dramićanin, M.. (2020). Luminescence Thermometry Using Dy3+-Activated Na0.25K0.25Bi0.5TiO3 Powders. in Journal of Electronic Materials, 49(6), 4002-4009.
https://doi.org/10.1007/s11664-020-08109-7

Kuzman S, Medić MM, Đorđević VR, Zeković IL, Ristić Z, Đačanin Far L, Dramićanin M. Luminescence Thermometry Using Dy3+-Activated Na0.25K0.25Bi0.5TiO3 Powders. in Journal of Electronic Materials. 2020;49(6):4002-4009.
doi:10.1007/s11664-020-08109-7 .

Kuzman, Sanja, Medić, Mina M., Đorđević, Vesna R., Zeković, Ivana Lj., Ristić, Zoran, Đačanin Far, Ljubica, Dramićanin, Miroslav, "Luminescence Thermometry Using Dy3+-Activated Na0.25K0.25Bi0.5TiO3 Powders" in Journal of Electronic Materials, 49, no. 6 (2020):4002-4009,
https://doi.org/10.1007/s11664-020-08109-7 . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Mašić, Slobodan
AU  - Medić, Mina M.
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
PY  - 2019
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0969806X18307163
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8003
AB  - Fabrics made of wool, linen, silk, and cotton, which are used in the making of artifacts of cultural heritage, were divided into three groups. The first group wasn't dyed, the second group was dyed with natural dye (using sour cherry), and the third one was dyed with artificial aniline dye. For the conservation purposes, all samples were exposed at ambient temperature to gamma radiation doses, from 0.5 to 25 kGy, using a Co-60 irradiator. The influence of gamma irradiation treatment on the color changes was investigated. The obtained results revealed that the irradiation affects the color changes in all samples. All samples became more or less darker under the influence of gamma irradiation. This change in darkness is most pronounced in samples dyed with natural colors. Also, the highest differences in color change and darkness were observed in linen samples. © 2018 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts
VL  - 156
SP  - 307
EP  - 313
DO  - 10.1016/j.radphyschem.2018.12.001
ER  - 

@article{
author = "Vujčić, Ivica and Mašić, Slobodan and Medić, Mina M. and Milićević, Bojana R. and Dramićanin, Miroslav",
year = "2019",
abstract = "Fabrics made of wool, linen, silk, and cotton, which are used in the making of artifacts of cultural heritage, were divided into three groups. The first group wasn't dyed, the second group was dyed with natural dye (using sour cherry), and the third one was dyed with artificial aniline dye. For the conservation purposes, all samples were exposed at ambient temperature to gamma radiation doses, from 0.5 to 25 kGy, using a Co-60 irradiator. The influence of gamma irradiation treatment on the color changes was investigated. The obtained results revealed that the irradiation affects the color changes in all samples. All samples became more or less darker under the influence of gamma irradiation. This change in darkness is most pronounced in samples dyed with natural colors. Also, the highest differences in color change and darkness were observed in linen samples. © 2018 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts",
volume = "156",
pages = "307-313",
doi = "10.1016/j.radphyschem.2018.12.001"
}

Vujčić, I., Mašić, S., Medić, M. M., Milićević, B. R.,& Dramićanin, M.. (2019). The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts. in Radiation Physics and Chemistry, 156, 307-313.
https://doi.org/10.1016/j.radphyschem.2018.12.001

Vujčić I, Mašić S, Medić MM, Milićević BR, Dramićanin M. The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts. in Radiation Physics and Chemistry. 2019;156:307-313.
doi:10.1016/j.radphyschem.2018.12.001 .

Vujčić, Ivica, Mašić, Slobodan, Medić, Mina M., Milićević, Bojana R., Dramićanin, Miroslav, "The influence of gamma irradiation on the color change of wool, linen, silk, and cotton fabrics used in cultural heritage artifacts" in Radiation Physics and Chemistry, 156 (2019):307-313,
https://doi.org/10.1016/j.radphyschem.2018.12.001 . .

TY  - JOUR
AU  - Sekulić, Milica
AU  - Đorđević, Vesna R.
AU  - Ristić, Zoran
AU  - Medić, Mina M.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://doi.wiley.com/10.1002/adom.201800552
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7865
AB  - The binary luminescence thermometry probe is prepared from Y2O3:Ho3+ and Mg2TiO4:Mn4+ powders. This probe facilitates self-referencing temperature readouts with excellent repeatability from both emission intensity ratio and excited state lifetimes. The ratio of intensities of Mn4+ deep red emission from 2E, 4T2→4A2 electronic transitions, and Ho3+ green emission from 5F4,5S2 →5I8 electronic transitions provides temperature measurements over the room temperature to 100 °C temperature range with a superior relative sensitivity of 4.6% °C−1 and temperature resolution of 0.1 °C. Over the same temperature range, the temperature readout from the Mn4+ emission lifetime offers measurements with relative sensitivity better than 0.5% °C−1 and better than 0.2 °C in resolution. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
T2  - Advanced Optical Materials
T1  - Highly Sensitive Dual Self-Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe
VL  - 6
IS  - 17
SP  - 1800552
DO  - 10.1002/adom.201800552
ER  - 

@article{
author = "Sekulić, Milica and Đorđević, Vesna R. and Ristić, Zoran and Medić, Mina M. and Dramićanin, Miroslav",
year = "2018",
abstract = "The binary luminescence thermometry probe is prepared from Y2O3:Ho3+ and Mg2TiO4:Mn4+ powders. This probe facilitates self-referencing temperature readouts with excellent repeatability from both emission intensity ratio and excited state lifetimes. The ratio of intensities of Mn4+ deep red emission from 2E, 4T2→4A2 electronic transitions, and Ho3+ green emission from 5F4,5S2 →5I8 electronic transitions provides temperature measurements over the room temperature to 100 °C temperature range with a superior relative sensitivity of 4.6% °C−1 and temperature resolution of 0.1 °C. Over the same temperature range, the temperature readout from the Mn4+ emission lifetime offers measurements with relative sensitivity better than 0.5% °C−1 and better than 0.2 °C in resolution. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",
journal = "Advanced Optical Materials",
title = "Highly Sensitive Dual Self-Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe",
volume = "6",
number = "17",
pages = "1800552",
doi = "10.1002/adom.201800552"
}

Sekulić, M., Đorđević, V. R., Ristić, Z., Medić, M. M.,& Dramićanin, M.. (2018). Highly Sensitive Dual Self-Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe. in Advanced Optical Materials, 6(17), 1800552.
https://doi.org/10.1002/adom.201800552

Sekulić M, Đorđević VR, Ristić Z, Medić MM, Dramićanin M. Highly Sensitive Dual Self-Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe. in Advanced Optical Materials. 2018;6(17):1800552.
doi:10.1002/adom.201800552 .

Sekulić, Milica, Đorđević, Vesna R., Ristić, Zoran, Medić, Mina M., Dramićanin, Miroslav, "Highly Sensitive Dual Self-Referencing Temperature Readout from the Mn4+/Ho3+ Binary Luminescence Thermometry Probe" in Advanced Optical Materials, 6, no. 17 (2018):1800552,
https://doi.org/10.1002/adom.201800552 . .

TY  - JOUR
AU  - Đorđević, Vesna R.
AU  - Brik, Mikhail G.
AU  - Srivastava, Alok M.
AU  - Medić, Mina M.
AU  - Vulić, Predrag J.
AU  - Glais, Estelle
AU  - Viana, Bruno
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7197
AB  - Herein, the synthesis, structural and crystal field analysis and optical spectroscopy of Mn4+ doped metal titanates ATiO(3) (A = Ca, Mg) are presented. Materials of desired phase were prepared by molten salt assisted sol-gel method in the powder form. Crystallographic data of samples were obtained by refinement of X-ray diffraction measurements. From experimental excitation and emission spectra and structural data, crystal field parameters and energy levels of Mn4+ in CaTiO3 and MgTiO3 were calculated by the exchange charge model of crystal-field theory. It is found that crystalline field strength is lower (Dq = 1831 cm(-1)) in the rhombohedral Ilmenite MgTiO3 structure due to the relatively longer average Mn4+-O2- bond distance (2.059 angstrom), and higher (Dq = 2017 cm(-1)) in orthorhombic CaTiO3 which possess shorter average Mn4+-O2- bond distance (1.956 angstrom). Spectral positions of the Mn(4+2)Eg - GT (4)A(2g) transition maxima is 709 nm in MgTiO3 and 717 nm in CaTiO3 respectively in good agreement with calculated values. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations
VL  - 74
SP  - 46
EP  - 51
DO  - 10.1016/j.optmat.2017.03.021
ER  - 

@article{
author = "Đorđević, Vesna R. and Brik, Mikhail G. and Srivastava, Alok M. and Medić, Mina M. and Vulić, Predrag J. and Glais, Estelle and Viana, Bruno and Dramićanin, Miroslav",
year = "2017",
abstract = "Herein, the synthesis, structural and crystal field analysis and optical spectroscopy of Mn4+ doped metal titanates ATiO(3) (A = Ca, Mg) are presented. Materials of desired phase were prepared by molten salt assisted sol-gel method in the powder form. Crystallographic data of samples were obtained by refinement of X-ray diffraction measurements. From experimental excitation and emission spectra and structural data, crystal field parameters and energy levels of Mn4+ in CaTiO3 and MgTiO3 were calculated by the exchange charge model of crystal-field theory. It is found that crystalline field strength is lower (Dq = 1831 cm(-1)) in the rhombohedral Ilmenite MgTiO3 structure due to the relatively longer average Mn4+-O2- bond distance (2.059 angstrom), and higher (Dq = 2017 cm(-1)) in orthorhombic CaTiO3 which possess shorter average Mn4+-O2- bond distance (1.956 angstrom). Spectral positions of the Mn(4+2)Eg - GT (4)A(2g) transition maxima is 709 nm in MgTiO3 and 717 nm in CaTiO3 respectively in good agreement with calculated values. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations",
volume = "74",
pages = "46-51",
doi = "10.1016/j.optmat.2017.03.021"
}

Đorđević, V. R., Brik, M. G., Srivastava, A. M., Medić, M. M., Vulić, P. J., Glais, E., Viana, B.,& Dramićanin, M.. (2017). Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations. in Optical Materials, 74, 46-51.
https://doi.org/10.1016/j.optmat.2017.03.021

Đorđević VR, Brik MG, Srivastava AM, Medić MM, Vulić PJ, Glais E, Viana B, Dramićanin M. Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations. in Optical Materials. 2017;74:46-51.
doi:10.1016/j.optmat.2017.03.021 .

Đorđević, Vesna R., Brik, Mikhail G., Srivastava, Alok M., Medić, Mina M., Vulić, Predrag J., Glais, Estelle, Viana, Bruno, Dramićanin, Miroslav, "Luminescence of Mn4+ ions in CaTiO3 and MgTiO3 perovskites: Relationship of experimental spectroscopic data and crystal field calculations" in Optical Materials, 74 (2017):46-51,
https://doi.org/10.1016/j.optmat.2017.03.021 . .

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  - Lojpur, Vesna
AU  - Ćulubrk, Sanja
AU  - Medić, Mina M.
AU  - Dramićanin, Miroslav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/878
AB  - Eu3+ doped GdAlO3 powder synthesized by solid state reaction was investigated for application in luminescence thermometry. Phase composition of material was confirmed by X-ray powder diffraction analysis. The photoluminescence emission spectra were collected under excitation of 399 rim, while elevating the temperature of the sample from the room temperature to 793 K. Emissions from D-5(1) - GT F-7(1) and D-5(0) - GT F-7(2) characteristic transitions of Eu3+ ions are selected for the temperature-dependence study using the fluorescence intensity ratio method. Emission decay curves measured at the strongest emission peak centered at 614 nm were recorded in a same temperature range. Data analysis showed that thermometry by fluorescence intensity ratio method can be used over the temperature region 293-793 K with the maximal relative sensitivity of 2.96% K-1 (at 293 K). Temporal dependence of emission (lifetime) provides temperature sensing from 620 to 793 K with the maximal relative sensitivity of 2.28% K-1. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Journal of Luminescence
T1  - Luminescence thermometry with Eu3+ doped GdAlO3
VL  - 170
IS  - SI
SP  - 467
EP  - 471
DO  - 10.1016/j.jlumin.2015.06.032
ER  - 

@article{
author = "Lojpur, Vesna and Ćulubrk, Sanja and Medić, Mina M. and Dramićanin, Miroslav",
year = "2016",
abstract = "Eu3+ doped GdAlO3 powder synthesized by solid state reaction was investigated for application in luminescence thermometry. Phase composition of material was confirmed by X-ray powder diffraction analysis. The photoluminescence emission spectra were collected under excitation of 399 rim, while elevating the temperature of the sample from the room temperature to 793 K. Emissions from D-5(1) - GT F-7(1) and D-5(0) - GT F-7(2) characteristic transitions of Eu3+ ions are selected for the temperature-dependence study using the fluorescence intensity ratio method. Emission decay curves measured at the strongest emission peak centered at 614 nm were recorded in a same temperature range. Data analysis showed that thermometry by fluorescence intensity ratio method can be used over the temperature region 293-793 K with the maximal relative sensitivity of 2.96% K-1 (at 293 K). Temporal dependence of emission (lifetime) provides temperature sensing from 620 to 793 K with the maximal relative sensitivity of 2.28% K-1. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Luminescence",
title = "Luminescence thermometry with Eu3+ doped GdAlO3",
volume = "170",
number = "SI",
pages = "467-471",
doi = "10.1016/j.jlumin.2015.06.032"
}

Lojpur, V., Ćulubrk, S., Medić, M. M.,& Dramićanin, M.. (2016). Luminescence thermometry with Eu3+ doped GdAlO3. in Journal of Luminescence
Elsevier., 170(SI), 467-471.
https://doi.org/10.1016/j.jlumin.2015.06.032

Lojpur V, Ćulubrk S, Medić MM, Dramićanin M. Luminescence thermometry with Eu3+ doped GdAlO3. in Journal of Luminescence. 2016;170(SI):467-471.
doi:10.1016/j.jlumin.2015.06.032 .

Lojpur, Vesna, Ćulubrk, Sanja, Medić, Mina M., Dramićanin, Miroslav, "Luminescence thermometry with Eu3+ doped GdAlO3" in Journal of Luminescence, 170, no. SI (2016):467-471,
https://doi.org/10.1016/j.jlumin.2015.06.032 . .

TY  - JOUR
AU  - Medić, Mina M.
AU  - Vasić, Marija
AU  - Zarubica, Aleksandra R.
AU  - Trandafilović, Lidija V.
AU  - Dražić, Goran
AU  - Dramićanin, Miroslav
AU  - Nedeljković, Jovan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1278
AB  - Magnesium-orthotitanate (Mg2TiO4) nano-powder was synthesized using a Pechini-type polymerized complex route. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that well-crystallized Mg2TiO4 nanoparticles are small in size (about 10 nm) with large specific surface area (72 m(2) g(-1)). The surface modification of Mg2TiO4 nano-powders with 5-amino salicylic acid and catechol induced a significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of Mg2TiO4 nano-powders have never been reported in the literature. Degradation reactions of an organic dye (crystal violet) were used to test the photocatalytic ability of pristine and surface-modified Mg2TiO4 nano-powders under illumination in different spectral regions. Excitation with UV light indicated, for the first time, photocatalytic ability of Mg2TiO4. Also, improved photocatalytic performance of surface-modified Mg2TiO4 nano-powders was found in comparison to unmodified ones.
T2  - RSC Advances
T1  - Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives
VL  - 6
IS  - 97
SP  - 94780
EP  - 94786
DO  - 10.1039/c6ra16284c
ER  - 

@article{
author = "Medić, Mina M. and Vasić, Marija and Zarubica, Aleksandra R. and Trandafilović, Lidija V. and Dražić, Goran and Dramićanin, Miroslav and Nedeljković, Jovan",
year = "2016",
abstract = "Magnesium-orthotitanate (Mg2TiO4) nano-powder was synthesized using a Pechini-type polymerized complex route. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that well-crystallized Mg2TiO4 nanoparticles are small in size (about 10 nm) with large specific surface area (72 m(2) g(-1)). The surface modification of Mg2TiO4 nano-powders with 5-amino salicylic acid and catechol induced a significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of Mg2TiO4 nano-powders have never been reported in the literature. Degradation reactions of an organic dye (crystal violet) were used to test the photocatalytic ability of pristine and surface-modified Mg2TiO4 nano-powders under illumination in different spectral regions. Excitation with UV light indicated, for the first time, photocatalytic ability of Mg2TiO4. Also, improved photocatalytic performance of surface-modified Mg2TiO4 nano-powders was found in comparison to unmodified ones.",
journal = "RSC Advances",
title = "Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives",
volume = "6",
number = "97",
pages = "94780-94786",
doi = "10.1039/c6ra16284c"
}

Medić, M. M., Vasić, M., Zarubica, A. R., Trandafilović, L. V., Dražić, G., Dramićanin, M.,& Nedeljković, J.. (2016). Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives. in RSC Advances, 6(97), 94780-94786.
https://doi.org/10.1039/c6ra16284c

Medić MM, Vasić M, Zarubica AR, Trandafilović LV, Dražić G, Dramićanin M, Nedeljković J. Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives. in RSC Advances. 2016;6(97):94780-94786.
doi:10.1039/c6ra16284c .

Medić, Mina M., Vasić, Marija, Zarubica, Aleksandra R., Trandafilović, Lidija V., Dražić, Goran, Dramićanin, Miroslav, Nedeljković, Jovan, "Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives" in RSC Advances, 6, no. 97 (2016):94780-94786,
https://doi.org/10.1039/c6ra16284c . .

TY  - THES
AU  - Medić, Mina M.
PY  - 2015
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=3214
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:11584/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=47509263
UR  - http://nardus.mpn.gov.rs/123456789/5868
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7287
AB  - Multifunkcionalni materijali se dizajniraju na taj način da mogu da ispune ciljane funkcije,prilagode se specifikacijama proizvoda i multifunkcionalnim primenama. Multifunkcionalninanomaterijali koriste sprege između više svojih svojstava kako bi obavljali kompleksnefunkcije. U ovoj doktorskoj disertaciji sintetisane su nanočestice magnezijum-ortotitanata, kao inanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i jonima prelaznih metalasa multifunkcionalnim svojstvima. Navedeni prahovi predstavljaju odličan izbor za brojneprimene. Korišćena je Pećini metoda sinteze koja se pokazala kao efikasna metoda za dobijanjenanočestica magnezijum-ortotitanata sa tačno određenom strukturom i morfologijom, svojstvimakoji su od presudnog značaja za unapređenje funkcionalnih karakteristika ovih prahova. U ovojdoktorskoj disertaciji istražena su strukturna, morfološka, luminescentna i fotokatalitičkasvojstva ovih nanomaterijala.U okviru ove doktorske disertacije korišćena je metoda Pećinijevog polimerizovanogkompleksnog rastvora za pripremu nanočestica Mg2TiO4, nedopiranog i dopiranog jonima retkihzemalja (Eu3+ i Sm3+). Ispitivan je uticaj procesnih parametara na strukturu i svojstva navedenihprahova, a u cilju optimizacije sinteze uzorci su žareni u temperaturnom opsegu od 400 – 650°C.Rendgeno-strukturnom analizom utvrđena je kubna struktura inveznog spinela i veličinakristalita od svega nekoliko nanometara. Morfološke karakteristike sintetisanih uzorakaispitivane su transmisionom elektronskom mikroskopijom (TEM) i skenirajućom elektronskommikroskopijom (SEM). Utvrđeno je da su nanočestice aglomerisane i imaju nepravilan zaobljenoblik. Optička svojstva ispitana su fotoluminescentnom spektroskopijom i snimljeni su emisionispektri svih sintetisanih uzoraka. Potvrđeno je da intenzitet emisije kod uzoraka dopiranihjonima retkih zemalja raste sa povećanjem temperature žarenja. Kod uzoraka magnezijumortotitanatadopiranog jonima retkih zemalja uočeni su svi karakteristični f↔f prelazi, koji potičuod aktivnih centara Eu3+ (5D0 → 7FJ) i Sm3+ (4G5/2 →6HJ). Proračunati su i analizirani JuddOfelt-oviparametri za uzorak Mg2TiO4:Eu3+ koji karakterišu lokalnu strukturu i veze u okolinijona retke zemlje. Takođe je potvrđeno da najbolja luminescentna svojstva pokazuju nanočesticepripremljene na 600°C/1h. Takođe, metodom Pećinijevog polimerizovanog kompleksa na temperaturi od 600°C/1hsintetisan je Mg2TiO4:Mn4+ i dobijene su čestice veličine od oko 10 nm. Izvršene su strukturne,morfološke, spektroskopske analize, kao i analiza kristalnog polja ovog materijala. Uočeni sukarakteristični d↔d2Eg →4A2g elektronski prelazi kod uzorka dopiranog jonima prelaznogmetala (Mn4+) koji su odgovorni za intenzivnu crvenu emisiju čestica. Primenom modelarazmene naelektrisanja dobijene su vrednosti parametara kristalnog polja Mn4+ u trigonalnomkristalnom polju Mg2TiO4. Jasno se može uočiti slaganje između proračunatih vrednostienergetskih nivoa i eksperimentalnih vrednosti eksitacionog i emisionog spektra.Ispitivana su fotokatalitička svojstva čistog Mg2TiO4 i površinski modifikovanog Mg2TiO4primenom bidentatnih benzenovih derivata, 5-amino salicilne kiseline i katehola. Na taj načinformiran je kompleks prenosa naelektrisanja usled čega dolazi do pomeranja apsorpcije premavidljivom spektralnom regionu. Fenomenom fizičke adsorpcije gasova na spoljnu i unutrašnjupovršinu nanopraha magnezijum-ortotitanata pomoću BET metode utvrđena je specifičnapovršina i mezoporoznost ovog praha. Degradacija organske boje (kristal ljubičasta) korišćena jeu cilju ispitivanja fotokatalitičkih svojstava čistog i površinski modifikovanog Mg2TiO4nanopraha pod osvetljenjem u različitim spektralnim regionima. Ekscitacijom pomoću UVsvetlosti indukovana su po prvi put fotokatalitička svojstva ovih prahova. Takođe, ekscitacijompomoću vidljive svetlosti ukazalo je na to da površinski modifikovani nanoprah magnezijumortotitanataima bolje fotokatalitičke performanse zbog sniženja energije zabranjene zone negošto je to u slučaju kod čistog magnezijum-ortotitanata. Dobijeni eksperimentalni rezultatiupoređeni su sa najviše proučavanim fotokatalitičkim materijalom TiO2 (komercijalno DegussaP25).
AB  - Multifunctional materials are designed in order to fulfill the causes of achieving aimed functions,adjusting to the specifications of products and being multifunctionally applied. Multifunctionalmaterials use the relations among various characteristics of their own in order to completecomplex functions. In this thesis nanoparticles of the magnesium-orthotitanate are synthetized, aswell as nanoparticles of magnesium-orthotitanate doped with rare earth and transition metals ionswith multifunctional properties. These materials represent an excellent choice for numerousapplications. The Pechini method of synthesis was used which proved itself as an efficientmethod for emanating nanoparticles of the magnesium-orthotitanate with the precisely fixedstructure and morphology, which are characteristics essential for improving of functionalcharacteristics of these powders. Moreover, in this thesis, structural, morphological, luminescentand photocatalytic characteristics of synthesized materials were researched.Within this doctoral thesis, for the preparation of nanoparticles of Mg2TiO4, undoped and dopedwith the ions of rare earth (Eu3+ i Sm3+), was used the Pechini’s polymerizable complex solutionmethod. There was investigated the effect of the processual parameters on structure andcharacteristics of the mentioned powders, and, in order to optimize the synthesis, the sampleshad been fired at a temperature range of 400 – 650ºC. The application of the X-ray structuralanalysis identified the cubic structure of the inverse spinel and the crystallite size of only a fewnanometers. Morphological characteristics of the synthetized samples were investigated viatransmission electronic microscopy (TEM) and scanning electronic microscopy (SEM). As aresult, it was established that nanoparticles are agglomerated and have an irregular orbicularshape. Optical characteristics were investigated by photoluminescence spectroscopy and therewere recorded emission spectra of all synthesized samples. It was confirmed that the emissionintensity of the samples doped by rare earth ions grows with the increase of the heatingtemperature. As far as samples of the magnesium-orthotitatanate doped with the rare earth ionsshowed all characteristic peaks arising from f↔f transitions, emanating from the active centers ofEu3+ (5D0 → 7FJ) and Sm3+ (4G5/2 →6HJ) ions. Moreover, there have been calculated and analysed Judd–Ofelt’s parameters for the sample of Mg2TiO4:Eu3+ which mark the local structureand relations within the environment of rare earth ions. In addition to this, it was confirmed thatnanoparticles prepared at 600ºC per hour show optimal luminescent characteristics.The Pechini’s polymerizable complex method, there was also synthetized Mg2TiO4:Mn4+ at600ºC per hour and there were obtained particles of about 10 nm in size. There were performedstructural, morphological and spectroscopic analyses, as well as the analysis of the crystal field.Moreover, there were observed characteristic d↔d2Eg →4A2g electronic transitions on a sampledoped with the transition metal ions (Mn4+) which are responsible for the intensive red particleemission. The application of the charge-transfer model yielded the values of the parameters ofthe crystal field of Mn4+ ions within the trigonal crystal field of Mg2TiO4. The matching betweencalculated values of energy levels and the experimental values of excitation and emission spectracan be noted.Photocatalytic properties of pure Mg2TiO4 and surface modified Mg2TiO4 via application ofbidentate benzene derivatives, a 5-amino salicylic acid and catechol, were researched. In thisway there was formed the charge transfer complex, during which occurs the moving of theabsorption towards the visible spectral area. By the application of the phenomenon of thephysical adsorption of gases on the external and internal surface of the nanopowder ofmagnesium- orthotitanate via BET method there was established specific surface andmesoporosity of this powder. The degradation of the organic colour (crystal violet) was used inorder to examine photocatalytic properties of the surface modified Mg2TiO4 nanopowder underthe luminance in different spectral areas. Using the excitation, via UV luminance there were, forthe first time, induced photocatalytic properties of this povder. Moreover, the excitation via thevisible light pointed out that the surface modified nanopowder of magnesium-orthotitanate hasbetter photocatalytic performances due to the lowering energy within the forbidden areacompared with the pure magnesium-orthotitanate. The obtained experimental results werecompared with the most frequently examined photocatalytic material TiO2 (commercially calledDegussa P25).
PB  - Универзитет у Београду, Технолошко-металуршки факултет
T2  - Универзитет у Београду
T1  - Multifunkcionalne nanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i prelaznih medalja
T1  - Multifunctional nanoparticles of magnesium-titanate doped with rare earth and transition metals ions.
UR  - https://hdl.handle.net/21.15107/rcub_nardus_5868
ER  - 

@phdthesis{
author = "Medić, Mina M.",
year = "2015",
abstract = "Multifunkcionalni materijali se dizajniraju na taj način da mogu da ispune ciljane funkcije,prilagode se specifikacijama proizvoda i multifunkcionalnim primenama. Multifunkcionalninanomaterijali koriste sprege između više svojih svojstava kako bi obavljali kompleksnefunkcije. U ovoj doktorskoj disertaciji sintetisane su nanočestice magnezijum-ortotitanata, kao inanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i jonima prelaznih metalasa multifunkcionalnim svojstvima. Navedeni prahovi predstavljaju odličan izbor za brojneprimene. Korišćena je Pećini metoda sinteze koja se pokazala kao efikasna metoda za dobijanjenanočestica magnezijum-ortotitanata sa tačno određenom strukturom i morfologijom, svojstvimakoji su od presudnog značaja za unapređenje funkcionalnih karakteristika ovih prahova. U ovojdoktorskoj disertaciji istražena su strukturna, morfološka, luminescentna i fotokatalitičkasvojstva ovih nanomaterijala.U okviru ove doktorske disertacije korišćena je metoda Pećinijevog polimerizovanogkompleksnog rastvora za pripremu nanočestica Mg2TiO4, nedopiranog i dopiranog jonima retkihzemalja (Eu3+ i Sm3+). Ispitivan je uticaj procesnih parametara na strukturu i svojstva navedenihprahova, a u cilju optimizacije sinteze uzorci su žareni u temperaturnom opsegu od 400 – 650°C.Rendgeno-strukturnom analizom utvrđena je kubna struktura inveznog spinela i veličinakristalita od svega nekoliko nanometara. Morfološke karakteristike sintetisanih uzorakaispitivane su transmisionom elektronskom mikroskopijom (TEM) i skenirajućom elektronskommikroskopijom (SEM). Utvrđeno je da su nanočestice aglomerisane i imaju nepravilan zaobljenoblik. Optička svojstva ispitana su fotoluminescentnom spektroskopijom i snimljeni su emisionispektri svih sintetisanih uzoraka. Potvrđeno je da intenzitet emisije kod uzoraka dopiranihjonima retkih zemalja raste sa povećanjem temperature žarenja. Kod uzoraka magnezijumortotitanatadopiranog jonima retkih zemalja uočeni su svi karakteristični f↔f prelazi, koji potičuod aktivnih centara Eu3+ (5D0 → 7FJ) i Sm3+ (4G5/2 →6HJ). Proračunati su i analizirani JuddOfelt-oviparametri za uzorak Mg2TiO4:Eu3+ koji karakterišu lokalnu strukturu i veze u okolinijona retke zemlje. Takođe je potvrđeno da najbolja luminescentna svojstva pokazuju nanočesticepripremljene na 600°C/1h. Takođe, metodom Pećinijevog polimerizovanog kompleksa na temperaturi od 600°C/1hsintetisan je Mg2TiO4:Mn4+ i dobijene su čestice veličine od oko 10 nm. Izvršene su strukturne,morfološke, spektroskopske analize, kao i analiza kristalnog polja ovog materijala. Uočeni sukarakteristični d↔d2Eg →4A2g elektronski prelazi kod uzorka dopiranog jonima prelaznogmetala (Mn4+) koji su odgovorni za intenzivnu crvenu emisiju čestica. Primenom modelarazmene naelektrisanja dobijene su vrednosti parametara kristalnog polja Mn4+ u trigonalnomkristalnom polju Mg2TiO4. Jasno se može uočiti slaganje između proračunatih vrednostienergetskih nivoa i eksperimentalnih vrednosti eksitacionog i emisionog spektra.Ispitivana su fotokatalitička svojstva čistog Mg2TiO4 i površinski modifikovanog Mg2TiO4primenom bidentatnih benzenovih derivata, 5-amino salicilne kiseline i katehola. Na taj načinformiran je kompleks prenosa naelektrisanja usled čega dolazi do pomeranja apsorpcije premavidljivom spektralnom regionu. Fenomenom fizičke adsorpcije gasova na spoljnu i unutrašnjupovršinu nanopraha magnezijum-ortotitanata pomoću BET metode utvrđena je specifičnapovršina i mezoporoznost ovog praha. Degradacija organske boje (kristal ljubičasta) korišćena jeu cilju ispitivanja fotokatalitičkih svojstava čistog i površinski modifikovanog Mg2TiO4nanopraha pod osvetljenjem u različitim spektralnim regionima. Ekscitacijom pomoću UVsvetlosti indukovana su po prvi put fotokatalitička svojstva ovih prahova. Takođe, ekscitacijompomoću vidljive svetlosti ukazalo je na to da površinski modifikovani nanoprah magnezijumortotitanataima bolje fotokatalitičke performanse zbog sniženja energije zabranjene zone negošto je to u slučaju kod čistog magnezijum-ortotitanata. Dobijeni eksperimentalni rezultatiupoređeni su sa najviše proučavanim fotokatalitičkim materijalom TiO2 (komercijalno DegussaP25)., Multifunctional materials are designed in order to fulfill the causes of achieving aimed functions,adjusting to the specifications of products and being multifunctionally applied. Multifunctionalmaterials use the relations among various characteristics of their own in order to completecomplex functions. In this thesis nanoparticles of the magnesium-orthotitanate are synthetized, aswell as nanoparticles of magnesium-orthotitanate doped with rare earth and transition metals ionswith multifunctional properties. These materials represent an excellent choice for numerousapplications. The Pechini method of synthesis was used which proved itself as an efficientmethod for emanating nanoparticles of the magnesium-orthotitanate with the precisely fixedstructure and morphology, which are characteristics essential for improving of functionalcharacteristics of these powders. Moreover, in this thesis, structural, morphological, luminescentand photocatalytic characteristics of synthesized materials were researched.Within this doctoral thesis, for the preparation of nanoparticles of Mg2TiO4, undoped and dopedwith the ions of rare earth (Eu3+ i Sm3+), was used the Pechini’s polymerizable complex solutionmethod. There was investigated the effect of the processual parameters on structure andcharacteristics of the mentioned powders, and, in order to optimize the synthesis, the sampleshad been fired at a temperature range of 400 – 650ºC. The application of the X-ray structuralanalysis identified the cubic structure of the inverse spinel and the crystallite size of only a fewnanometers. Morphological characteristics of the synthetized samples were investigated viatransmission electronic microscopy (TEM) and scanning electronic microscopy (SEM). As aresult, it was established that nanoparticles are agglomerated and have an irregular orbicularshape. Optical characteristics were investigated by photoluminescence spectroscopy and therewere recorded emission spectra of all synthesized samples. It was confirmed that the emissionintensity of the samples doped by rare earth ions grows with the increase of the heatingtemperature. As far as samples of the magnesium-orthotitatanate doped with the rare earth ionsshowed all characteristic peaks arising from f↔f transitions, emanating from the active centers ofEu3+ (5D0 → 7FJ) and Sm3+ (4G5/2 →6HJ) ions. Moreover, there have been calculated and analysed Judd–Ofelt’s parameters for the sample of Mg2TiO4:Eu3+ which mark the local structureand relations within the environment of rare earth ions. In addition to this, it was confirmed thatnanoparticles prepared at 600ºC per hour show optimal luminescent characteristics.The Pechini’s polymerizable complex method, there was also synthetized Mg2TiO4:Mn4+ at600ºC per hour and there were obtained particles of about 10 nm in size. There were performedstructural, morphological and spectroscopic analyses, as well as the analysis of the crystal field.Moreover, there were observed characteristic d↔d2Eg →4A2g electronic transitions on a sampledoped with the transition metal ions (Mn4+) which are responsible for the intensive red particleemission. The application of the charge-transfer model yielded the values of the parameters ofthe crystal field of Mn4+ ions within the trigonal crystal field of Mg2TiO4. The matching betweencalculated values of energy levels and the experimental values of excitation and emission spectracan be noted.Photocatalytic properties of pure Mg2TiO4 and surface modified Mg2TiO4 via application ofbidentate benzene derivatives, a 5-amino salicylic acid and catechol, were researched. In thisway there was formed the charge transfer complex, during which occurs the moving of theabsorption towards the visible spectral area. By the application of the phenomenon of thephysical adsorption of gases on the external and internal surface of the nanopowder ofmagnesium- orthotitanate via BET method there was established specific surface andmesoporosity of this powder. The degradation of the organic colour (crystal violet) was used inorder to examine photocatalytic properties of the surface modified Mg2TiO4 nanopowder underthe luminance in different spectral areas. Using the excitation, via UV luminance there were, forthe first time, induced photocatalytic properties of this povder. Moreover, the excitation via thevisible light pointed out that the surface modified nanopowder of magnesium-orthotitanate hasbetter photocatalytic performances due to the lowering energy within the forbidden areacompared with the pure magnesium-orthotitanate. The obtained experimental results werecompared with the most frequently examined photocatalytic material TiO2 (commercially calledDegussa P25).",
publisher = "Универзитет у Београду, Технолошко-металуршки факултет",
journal = "Универзитет у Београду",
title = "Multifunkcionalne nanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i prelaznih medalja, Multifunctional nanoparticles of magnesium-titanate doped with rare earth and transition metals ions.",
url = "https://hdl.handle.net/21.15107/rcub_nardus_5868"
}

Medić, M. M.. (2015). Multifunkcionalne nanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i prelaznih medalja. in Универзитет у Београду
Универзитет у Београду, Технолошко-металуршки факултет..
https://hdl.handle.net/21.15107/rcub_nardus_5868

Medić MM. Multifunkcionalne nanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i prelaznih medalja. in Универзитет у Београду. 2015;.
https://hdl.handle.net/21.15107/rcub_nardus_5868 .

Medić, Mina M., "Multifunkcionalne nanočestice magnezijum-ortotitanata dopiranog jonima retkih zemalja i prelaznih medalja" in Универзитет у Београду (2015),
https://hdl.handle.net/21.15107/rcub_nardus_5868 .

TY  - JOUR
AU  - Medić, Mina M.
AU  - Brik, Mikhail G.
AU  - Dražić, Goran
AU  - Antić, Željka
AU  - Lojpur, Vesna
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/351
T2  - Journal of Physical Chemistry. C
T1  - Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles
VL  - 119
IS  - 1
SP  - 724
EP  - 730
DO  - 10.1021/jp5095646
ER  - 

@article{
author = "Medić, Mina M. and Brik, Mikhail G. and Dražić, Goran and Antić, Željka and Lojpur, Vesna and Dramićanin, Miroslav",
year = "2015",
journal = "Journal of Physical Chemistry. C",
title = "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles",
volume = "119",
number = "1",
pages = "724-730",
doi = "10.1021/jp5095646"
}

Medić, M. M., Brik, M. G., Dražić, G., Antić, Ž., Lojpur, V.,& Dramićanin, M.. (2015). Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C, 119(1), 724-730.
https://doi.org/10.1021/jp5095646

Medić MM, Brik MG, Dražić G, Antić Ž, Lojpur V, Dramićanin M. Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C. 2015;119(1):724-730.
doi:10.1021/jp5095646 .

Medić, Mina M., Brik, Mikhail G., Dražić, Goran, Antić, Željka, Lojpur, Vesna, Dramićanin, Miroslav, "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles" in Journal of Physical Chemistry. C, 119, no. 1 (2015):724-730,
https://doi.org/10.1021/jp5095646 . .

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 . .

TY  - CONF
AU  - Medić, Mina M.
AU  - Nikolić, Marko G.
AU  - Lojpur, Vesna
AU  - Mančić, Lidija
AU  - Milošević, Olivera
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - http://dais.sanu.ac.rs/123456789/812
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7538
AB  - Thermographic phosphors are oxides doped With rare-earth or transition metal ions that will emit visible, Infrared, or UV light upon excitation from an external energy source This materials have received significant attention due to the potential application as optical temperature sensor In this report, we have investigated yttrium oxide co-doped with changeable ytterbium to erbium ratio (Y1.94YbO.05Er001 and Y1 97YbO 02ErO 01) fabricated through hydrothermal synthesis Process conditions (2h, 200 'C) and additional thermal treatment (3h, 1100 'C) allows obtaining nanoparticles of appropriate composition and morphology which further affect on improved photoluminescent characteristics. The fluorescence Intensity ratio (FIR) technique is used to examine potential usage of samples as low temperature sensors. This optical method is based on ratio between two emission lines or areas In photoluminescence spectrum which show temperature dependence. Photoluminescent measurements (PL) are recorded In the temperature range from 10K to 300 K under 978 nm excitingwavelength Observing changes In following transitions blue 2H912~4115/2, green (2H1112, 4S3/2) ~ 411512 and red 4F912~4115/2 Obtained experimental results imply that the fluorescent intensity ratio of the blue, green and red linesand areas show significant temperature sensitivity and can be used as low temperature sensor.
PB  - San Francisco : Materials Research Society
C3  - 2013 MRS Spring Meeting and Exhibit, April 1-5, 2013, San Francisco. California: Program and exhibit guide
T1  - Thermographic Properties of Up-conversion Emission of Y2O3:Yb, Er Nanophosphors Obtained through Hydrothermal Synthesis
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7538
ER  - 

@conference{
author = "Medić, Mina M. and Nikolić, Marko G. and Lojpur, Vesna and Mančić, Lidija and Milošević, Olivera and Dramićanin, Miroslav",
year = "2013",
abstract = "Thermographic phosphors are oxides doped With rare-earth or transition metal ions that will emit visible, Infrared, or UV light upon excitation from an external energy source This materials have received significant attention due to the potential application as optical temperature sensor In this report, we have investigated yttrium oxide co-doped with changeable ytterbium to erbium ratio (Y1.94YbO.05Er001 and Y1 97YbO 02ErO 01) fabricated through hydrothermal synthesis Process conditions (2h, 200 'C) and additional thermal treatment (3h, 1100 'C) allows obtaining nanoparticles of appropriate composition and morphology which further affect on improved photoluminescent characteristics. The fluorescence Intensity ratio (FIR) technique is used to examine potential usage of samples as low temperature sensors. This optical method is based on ratio between two emission lines or areas In photoluminescence spectrum which show temperature dependence. Photoluminescent measurements (PL) are recorded In the temperature range from 10K to 300 K under 978 nm excitingwavelength Observing changes In following transitions blue 2H912~4115/2, green (2H1112, 4S3/2) ~ 411512 and red 4F912~4115/2 Obtained experimental results imply that the fluorescent intensity ratio of the blue, green and red linesand areas show significant temperature sensitivity and can be used as low temperature sensor.",
publisher = "San Francisco : Materials Research Society",
journal = "2013 MRS Spring Meeting and Exhibit, April 1-5, 2013, San Francisco. California: Program and exhibit guide",
title = "Thermographic Properties of Up-conversion Emission of Y2O3:Yb, Er Nanophosphors Obtained through Hydrothermal Synthesis",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7538"
}

Medić, M. M., Nikolić, M. G., Lojpur, V., Mančić, L., Milošević, O.,& Dramićanin, M.. (2013). Thermographic Properties of Up-conversion Emission of Y2O3:Yb, Er Nanophosphors Obtained through Hydrothermal Synthesis. in 2013 MRS Spring Meeting and Exhibit, April 1-5, 2013, San Francisco. California: Program and exhibit guide
San Francisco : Materials Research Society..
https://hdl.handle.net/21.15107/rcub_vinar_7538

Medić MM, Nikolić MG, Lojpur V, Mančić L, Milošević O, Dramićanin M. Thermographic Properties of Up-conversion Emission of Y2O3:Yb, Er Nanophosphors Obtained through Hydrothermal Synthesis. in 2013 MRS Spring Meeting and Exhibit, April 1-5, 2013, San Francisco. California: Program and exhibit guide. 2013;.
https://hdl.handle.net/21.15107/rcub_vinar_7538 .

Medić, Mina M., Nikolić, Marko G., Lojpur, Vesna, Mančić, Lidija, Milošević, Olivera, Dramićanin, Miroslav, "Thermographic Properties of Up-conversion Emission of Y2O3:Yb, Er Nanophosphors Obtained through Hydrothermal Synthesis" in 2013 MRS Spring Meeting and Exhibit, April 1-5, 2013, San Francisco. California: Program and exhibit guide (2013),
https://hdl.handle.net/21.15107/rcub_vinar_7538 .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Nikolić, Marko G.
AU  - Jovanović, Dragana J.
AU  - Medić, Mina M.
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5715
AB  - Herein, temperature dependencies of emission and emission decay of Zn2SiO4:Mn2+ powder in the range from room temperature to 300 degrees C is reported. These dependencies allow temperature sensing from luminescence measurements, since Mn2+ emission intensity, emission band spectral position, and emission decay are rapidly changing over the entire temperature range. For fluorescence intensity ratio method, measurement that relays on emission intensity changes with temperature, sensitivity of 12.2% is found. In the case of lifetime thermometry, method that relays on emission decay changes with temperature, sensitivity of 0.48% is determined. Both sensitivity values are among the highest ever recorded for inorganic materials. (C) 2013 AIP Publishing LLC.
T2  - Applied Physics Letters
T1  - Luminescence thermometry with Zn2SiO4:Mn2+ powder
VL  - 103
IS  - 14
DO  - 10.1063/1.4824208
ER  - 

@article{
author = "Lojpur, Vesna and Nikolić, Marko G. and Jovanović, Dragana J. and Medić, Mina M. and Antić, Željka and Dramićanin, Miroslav",
year = "2013",
abstract = "Herein, temperature dependencies of emission and emission decay of Zn2SiO4:Mn2+ powder in the range from room temperature to 300 degrees C is reported. These dependencies allow temperature sensing from luminescence measurements, since Mn2+ emission intensity, emission band spectral position, and emission decay are rapidly changing over the entire temperature range. For fluorescence intensity ratio method, measurement that relays on emission intensity changes with temperature, sensitivity of 12.2% is found. In the case of lifetime thermometry, method that relays on emission decay changes with temperature, sensitivity of 0.48% is determined. Both sensitivity values are among the highest ever recorded for inorganic materials. (C) 2013 AIP Publishing LLC.",
journal = "Applied Physics Letters",
title = "Luminescence thermometry with Zn2SiO4:Mn2+ powder",
volume = "103",
number = "14",
doi = "10.1063/1.4824208"
}

Lojpur, V., Nikolić, M. G., Jovanović, D. J., Medić, M. M., Antić, Ž.,& Dramićanin, M.. (2013). Luminescence thermometry with Zn2SiO4:Mn2+ powder. in Applied Physics Letters, 103(14).
https://doi.org/10.1063/1.4824208

Lojpur V, Nikolić MG, Jovanović DJ, Medić MM, Antić Ž, Dramićanin M. Luminescence thermometry with Zn2SiO4:Mn2+ powder. in Applied Physics Letters. 2013;103(14).
doi:10.1063/1.4824208 .

Lojpur, Vesna, Nikolić, Marko G., Jovanović, Dragana J., Medić, Mina M., Antić, Željka, Dramićanin, Miroslav, "Luminescence thermometry with Zn2SiO4:Mn2+ powder" in Applied Physics Letters, 103, no. 14 (2013),
https://doi.org/10.1063/1.4824208 . .

TY  - CONF
AU  - Lojpur, Vesna
AU  - Nikolić, Marko G.
AU  - Medić, Mina M.
AU  - Mančić, Lidija
AU  - Milošević, Olivera
AU  - Dramićanin, Miroslav
PY  - 2012
UR  - http://dais.sanu.ac.rs/123456789/509
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7462
AB  - In recent years trivalent rare earth doped materials have received significant attention for optical temperature sensors. In these materials ratio of fluorescence emissions from different energy levels exhibit strong temperature dependence. Synthesized Y2O3:Yb,Tm and Y2O3:Yb,Ho powders were obtained via spray pyrolysis at 900 °C using 0.1 M nitrate precursor. Using laser excitation at 978 nm we investigated upconversion emission of these powders and recorded characteristic transitions: 1D2→3F4, 1G4→3H6, 1G4→3F4, 3F2,3→3H6, 1D2→3F3, 1G4→3H6, 3H4→3H6 for Tm3+ and 5F4, 5S2→5I8, 5F5→5I8, 5F4, 5S2→5I7 for Ho3+. Further we analyzed temperature dependence of fluorescence intensity ratios of different Stark components in the range from 10K to 300K. Several of these ratios exhibit significant temperature sensitivity, with the largest value of 0.08 K-1.
C3  - 2nd International Conference on Optical, Electronic and Electrical Materials, 5-7 August 2012, Shanghai, China
T1  - Low temperature sensitivity of upconversion emission in Y2O3:Yb,Tm and Y2O3:Yb,Ho powders
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7462
ER  - 

@conference{
author = "Lojpur, Vesna and Nikolić, Marko G. and Medić, Mina M. and Mančić, Lidija and Milošević, Olivera and Dramićanin, Miroslav",
year = "2012",
abstract = "In recent years trivalent rare earth doped materials have received significant attention for optical temperature sensors. In these materials ratio of fluorescence emissions from different energy levels exhibit strong temperature dependence. Synthesized Y2O3:Yb,Tm and Y2O3:Yb,Ho powders were obtained via spray pyrolysis at 900 °C using 0.1 M nitrate precursor. Using laser excitation at 978 nm we investigated upconversion emission of these powders and recorded characteristic transitions: 1D2→3F4, 1G4→3H6, 1G4→3F4, 3F2,3→3H6, 1D2→3F3, 1G4→3H6, 3H4→3H6 for Tm3+ and 5F4, 5S2→5I8, 5F5→5I8, 5F4, 5S2→5I7 for Ho3+. Further we analyzed temperature dependence of fluorescence intensity ratios of different Stark components in the range from 10K to 300K. Several of these ratios exhibit significant temperature sensitivity, with the largest value of 0.08 K-1.",
journal = "2nd International Conference on Optical, Electronic and Electrical Materials, 5-7 August 2012, Shanghai, China",
title = "Low temperature sensitivity of upconversion emission in Y2O3:Yb,Tm and Y2O3:Yb,Ho powders",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7462"
}

Lojpur, V., Nikolić, M. G., Medić, M. M., Mančić, L., Milošević, O.,& Dramićanin, M.. (2012). Low temperature sensitivity of upconversion emission in Y2O3:Yb,Tm and Y2O3:Yb,Ho powders. in 2nd International Conference on Optical, Electronic and Electrical Materials, 5-7 August 2012, Shanghai, China.
https://hdl.handle.net/21.15107/rcub_vinar_7462

Lojpur V, Nikolić MG, Medić MM, Mančić L, Milošević O, Dramićanin M. Low temperature sensitivity of upconversion emission in Y2O3:Yb,Tm and Y2O3:Yb,Ho powders. in 2nd International Conference on Optical, Electronic and Electrical Materials, 5-7 August 2012, Shanghai, China. 2012;.
https://hdl.handle.net/21.15107/rcub_vinar_7462 .

Lojpur, Vesna, Nikolić, Marko G., Medić, Mina M., Mančić, Lidija, Milošević, Olivera, Dramićanin, Miroslav, "Low temperature sensitivity of upconversion emission in Y2O3:Yb,Tm and Y2O3:Yb,Ho powders" in 2nd International Conference on Optical, Electronic and Electrical Materials, 5-7 August 2012, Shanghai, China (2012),
https://hdl.handle.net/21.15107/rcub_vinar_7462 .

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 . .