TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Milenković, Katarina
AU  - Antić, Željka
AU  - Smits, Krisjanis
AU  - Kemere, Meldra
AU  - Vitols, Kaspars
AU  - Sarakovskis, Anatolijs
AU  - Dramićanin, Miroslav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10590
AB  - We report the procedure for hydrothermal synthesis of ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. These phosphors were synthesized by varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%) with the aim to analyze their emissions in the near IR spectral range. According to the detailed structural analysis, Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions has a huge impact on the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The results show that the optimal dopant concentrations for upconversion luminescence of Yb3+/Tm3+ co-doped SLF are 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Under 980 nm light excitation, a strong upconversion emission of Tm3+ ions around 800 nm was achieved. In addition, the experimental photoluminescence lifetime of Tm3+ emission in the SLF host is reported. This study discovered that efficient near IR emission from ultrasmall Yb3+/Tm3+ co-doped SLF phosphors may have potential applications in the fields of fluorescent labels in bioimaging and security applications.
T2  - Nanomaterials
T1  - Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles
VL  - 13
IS  - 1
SP  - 30
DO  - 10.3390/nano13010030
ER  - 

@article{
author = "Milićević, Bojana R. and Periša, Jovana and Ristić, Zoran and Milenković, Katarina and Antić, Željka and Smits, Krisjanis and Kemere, Meldra and Vitols, Kaspars and Sarakovskis, Anatolijs and Dramićanin, Miroslav",
year = "2023",
abstract = "We report the procedure for hydrothermal synthesis of ultrasmall Yb3+/Tm3+ co-doped Sr2LaF7 (SLF) upconversion phosphors. These phosphors were synthesized by varying the concentrations of Yb3+ (x = 10, 15, 20, and 25 mol%) and Tm3+ (y = 0.75, 1, 2, and 3 mol%) with the aim to analyze their emissions in the near IR spectral range. According to the detailed structural analysis, Yb3+ and Tm3+ occupy the La3+ sites in the SLF host. The addition of Yb3+/Tm3+ ions has a huge impact on the lattice constant, particle size, and PL emission properties of the synthesized SLF nanophosphor. The results show that the optimal dopant concentrations for upconversion luminescence of Yb3+/Tm3+ co-doped SLF are 20 mol% Yb3+ and 1 mol% Tm3+ with EDTA as the chelating agent. Under 980 nm light excitation, a strong upconversion emission of Tm3+ ions around 800 nm was achieved. In addition, the experimental photoluminescence lifetime of Tm3+ emission in the SLF host is reported. This study discovered that efficient near IR emission from ultrasmall Yb3+/Tm3+ co-doped SLF phosphors may have potential applications in the fields of fluorescent labels in bioimaging and security applications.",
journal = "Nanomaterials",
title = "Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles",
volume = "13",
number = "1",
pages = "30",
doi = "10.3390/nano13010030"
}

Milićević, B. R., Periša, J., Ristić, Z., Milenković, K., Antić, Ž., Smits, K., Kemere, M., Vitols, K., Sarakovskis, A.,& Dramićanin, M.. (2023). Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles. in Nanomaterials, 13(1), 30.
https://doi.org/10.3390/nano13010030

Milićević BR, Periša J, Ristić Z, Milenković K, Antić Ž, Smits K, Kemere M, Vitols K, Sarakovskis A, Dramićanin M. Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles. in Nanomaterials. 2023;13(1):30.
doi:10.3390/nano13010030 .

Milićević, Bojana R., Periša, Jovana, Ristić, Zoran, Milenković, Katarina, Antić, Željka, Smits, Krisjanis, Kemere, Meldra, Vitols, Kaspars, Sarakovskis, Anatolijs, Dramićanin, Miroslav, "Hydrothermal Synthesis and Properties of Yb3+/Tm3+ Doped Sr2LaF7 Upconversion Nanoparticles" in Nanomaterials, 13, no. 1 (2023):30,
https://doi.org/10.3390/nano13010030 . .

TY  - JOUR
AU  - Antić, Željka
AU  - Ćirić, Aleksandar
AU  - Sekulić, Milica
AU  - Periša, Jovana
AU  - Milićević, Bojana
AU  - Alodhayb, Abdullah N.
AU  - Alrebdi, Tahani A.
AU  - Dramićanin, Miroslav
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11216
AB  - The sensitivity of luminescent Boltzmann thermometers is restricted by the energy difference between the thermally coupled excitement levels of trivalent lanthanides, and their values further decrease with increases in temperature, rendering their use at high temperatures difficult. Here, we demonstrate how to overcome this sensitivity limitation by employing multiparameter and multilevel cascade temperature readings. For this purpose, we synthesized Dy3+:Y2SiO5, a phosphor whose emission is known to begin quenching at very high temperatures. Its photoluminescence-emission features, later used for thermometry, consisted of two blue emission bands centered around 486 nm and 458 nm, and two bands centered around 430 nm and 398 nm, which were only visible at elevated temperatures. Next, we performed thermometry using the standard luminescence-intensity ratio (LIR) method, which employs the 4F9/2 and 4I15/2 Dy3+ levels’ emissions and the multilevel cascade method, which additionally uses the 4G11/2 level and overlapping intensities of 4I13/2, 4M21/2, 4K17/2, and 4F7/2 levels to create two LIRs with a larger energy difference than the standard LIR. This approach yielded a sensitivity that was 3.14 times greater than the standard method. Finally, we simultaneously exploited all the LIRs in the multiparameter temperature readings and found a relative sensitivity that was 30 times greater than that of the standard approach.
T2  - Crystals
T1  - Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings
VL  - 13
IS  - 6
SP  - 884
DO  - 10.3390/cryst13060884
ER  - 

@article{
author = "Antić, Željka and Ćirić, Aleksandar and Sekulić, Milica and Periša, Jovana and Milićević, Bojana and Alodhayb, Abdullah N. and Alrebdi, Tahani A. and Dramićanin, Miroslav",
year = "2023",
abstract = "The sensitivity of luminescent Boltzmann thermometers is restricted by the energy difference between the thermally coupled excitement levels of trivalent lanthanides, and their values further decrease with increases in temperature, rendering their use at high temperatures difficult. Here, we demonstrate how to overcome this sensitivity limitation by employing multiparameter and multilevel cascade temperature readings. For this purpose, we synthesized Dy3+:Y2SiO5, a phosphor whose emission is known to begin quenching at very high temperatures. Its photoluminescence-emission features, later used for thermometry, consisted of two blue emission bands centered around 486 nm and 458 nm, and two bands centered around 430 nm and 398 nm, which were only visible at elevated temperatures. Next, we performed thermometry using the standard luminescence-intensity ratio (LIR) method, which employs the 4F9/2 and 4I15/2 Dy3+ levels’ emissions and the multilevel cascade method, which additionally uses the 4G11/2 level and overlapping intensities of 4I13/2, 4M21/2, 4K17/2, and 4F7/2 levels to create two LIRs with a larger energy difference than the standard LIR. This approach yielded a sensitivity that was 3.14 times greater than the standard method. Finally, we simultaneously exploited all the LIRs in the multiparameter temperature readings and found a relative sensitivity that was 30 times greater than that of the standard approach.",
journal = "Crystals",
title = "Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings",
volume = "13",
number = "6",
pages = "884",
doi = "10.3390/cryst13060884"
}

Antić, Ž., Ćirić, A., Sekulić, M., Periša, J., Milićević, B., Alodhayb, A. N., Alrebdi, T. A.,& Dramićanin, M.. (2023). Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings. in Crystals, 13(6), 884.
https://doi.org/10.3390/cryst13060884

Antić Ž, Ćirić A, Sekulić M, Periša J, Milićević B, Alodhayb AN, Alrebdi TA, Dramićanin M. Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings. in Crystals. 2023;13(6):884.
doi:10.3390/cryst13060884 .

Antić, Željka, Ćirić, Aleksandar, Sekulić, Milica, Periša, Jovana, Milićević, Bojana, Alodhayb, Abdullah N., Alrebdi, Tahani A., Dramićanin, Miroslav, "Thirty-Fold Increase in Relative Sensitivity of Dy3+ Luminescent Boltzmann Thermometers Using Multiparameter and Multilevel Cascade Temperature Readings" in Crystals, 13, no. 6 (2023):884,
https://doi.org/10.3390/cryst13060884 . .

TY  - JOUR
AU  - Martinović, Ana
AU  - Milićević, Bojana
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Stojadinović, Stevan
AU  - Dramićanin, Miroslav
AU  - Ćirić, Aleksandar
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11361
AB  - Luminescence thermometry uses temperature-dependent emission of light for remote sensing. Dy3+ is established as a perspective ion for high-temperature probes, but given that there is an infinite number of potential hosts it is impossible to find conventionally the one with the best performance. Judd-Ofelt thermometric model can predict sensitivities but it was not yet experimentally validated on Dy3+ ion. Pure phase CaYAlO4:Dy3+ powder was synthesized via the modified Pechini method. Photoluminescence spectra were taken from 300 to 600 K. Luminescence intensity ratio was estimated using 4 I15/2 and 4 F9/2 levels. Experimentally obtained thermometric parameters and sensitivities showed an excellent matching with those obtained from the Judd-Ofelt, indicating the potential application of the Judd-Ofelt model for fast assessment of Dy3+-doped luminescent sensor thermometric perspective. The maximum absolute and relative sensitivities are ~0.001 K− 1 at 600 K and ~1.4% K− 1 at 300 K, respectively. The optimum temperature range for the CaYAlO4:Dy3+ probe is from 370 to 616 K.
T2  - Physica B: Condensed Matter
T1  - Thermometric Judd-Ofelt model for Dy3+ ion tested in CaYAlO4 host and evaluation of its sensing performances for luminescence thermometry
VL  - 666
SP  - 415096
DO  - 10.1016/j.physb.2023.415096
ER  - 

@article{
author = "Martinović, Ana and Milićević, Bojana and Periša, Jovana and Ristić, Zoran and Stojadinović, Stevan and Dramićanin, Miroslav and Ćirić, Aleksandar",
year = "2023",
abstract = "Luminescence thermometry uses temperature-dependent emission of light for remote sensing. Dy3+ is established as a perspective ion for high-temperature probes, but given that there is an infinite number of potential hosts it is impossible to find conventionally the one with the best performance. Judd-Ofelt thermometric model can predict sensitivities but it was not yet experimentally validated on Dy3+ ion. Pure phase CaYAlO4:Dy3+ powder was synthesized via the modified Pechini method. Photoluminescence spectra were taken from 300 to 600 K. Luminescence intensity ratio was estimated using 4 I15/2 and 4 F9/2 levels. Experimentally obtained thermometric parameters and sensitivities showed an excellent matching with those obtained from the Judd-Ofelt, indicating the potential application of the Judd-Ofelt model for fast assessment of Dy3+-doped luminescent sensor thermometric perspective. The maximum absolute and relative sensitivities are ~0.001 K− 1 at 600 K and ~1.4% K− 1 at 300 K, respectively. The optimum temperature range for the CaYAlO4:Dy3+ probe is from 370 to 616 K.",
journal = "Physica B: Condensed Matter",
title = "Thermometric Judd-Ofelt model for Dy3+ ion tested in CaYAlO4 host and evaluation of its sensing performances for luminescence thermometry",
volume = "666",
pages = "415096",
doi = "10.1016/j.physb.2023.415096"
}

Martinović, A., Milićević, B., Periša, J., Ristić, Z., Stojadinović, S., Dramićanin, M.,& Ćirić, A.. (2023). Thermometric Judd-Ofelt model for Dy3+ ion tested in CaYAlO4 host and evaluation of its sensing performances for luminescence thermometry. in Physica B: Condensed Matter, 666, 415096.
https://doi.org/10.1016/j.physb.2023.415096

Martinović A, Milićević B, Periša J, Ristić Z, Stojadinović S, Dramićanin M, Ćirić A. Thermometric Judd-Ofelt model for Dy3+ ion tested in CaYAlO4 host and evaluation of its sensing performances for luminescence thermometry. in Physica B: Condensed Matter. 2023;666:415096.
doi:10.1016/j.physb.2023.415096 .

Martinović, Ana, Milićević, Bojana, Periša, Jovana, Ristić, Zoran, Stojadinović, Stevan, Dramićanin, Miroslav, Ćirić, Aleksandar, "Thermometric Judd-Ofelt model for Dy3+ ion tested in CaYAlO4 host and evaluation of its sensing performances for luminescence thermometry" in Physica B: Condensed Matter, 666 (2023):415096,
https://doi.org/10.1016/j.physb.2023.415096 . .

TY  - JOUR
AU  - Wang, Yunfeng
AU  - Zhu, Qijian
AU  - Li, Junhao
AU  - Milićević, Bojana R.
AU  - Zhou, Rongfu
AU  - Liu, Shuanglai
AU  - Zhang, Qiuhong
AU  - Huo, Jiansheng
AU  - Zhou, Jianbang
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11079
AB  - Mn4+-activated fluoride is one of the most important red phosphors for white light-emitting diodes (WLEDs) with high color rendering index (CRI). Due to a lack of water resistance, their potential applications are limited. Although surface coating strategies improve the waterproof stability of fluoride red phosphors, they have downsides. It was found that Nb5+ plays an important role in improving the water resistance of Mn4+-activated oxyfluorides by preventing the hydrolysis of [MnF6]2-. In this work, the influence of Nb5+ on the waterproof stability of Mn4+-activated fluorides was explored. A set of synthesized K2Ta1-xNbxF7:Mn4+ phosphors exhibit tunable and superior water resistance. The photoluminescence (PL) intensity of the representative sample K2Ta0.6Nb0.4F7:5%Mn4+ remains nearly 100% of its initial value even after being immersed in water for 60 min, which is significantly higher than the commercial K2SiF6:Mn4+ red phosphor (8.7%). Our findings open up new possibilities for the development of waterproof fluoride red phosphors. © 2023 Elsevier Ltd and Techna Group S.r.l.
T2  - Ceramics International
T1  - Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors
VL  - 49
IS  - 16
SP  - 27024
EP  - 27029
DO  - 10.1016/j.ceramint.2023.05.244
ER  - 

@article{
author = "Wang, Yunfeng and Zhu, Qijian and Li, Junhao and Milićević, Bojana R. and Zhou, Rongfu and Liu, Shuanglai and Zhang, Qiuhong and Huo, Jiansheng and Zhou, Jianbang",
year = "2023",
abstract = "Mn4+-activated fluoride is one of the most important red phosphors for white light-emitting diodes (WLEDs) with high color rendering index (CRI). Due to a lack of water resistance, their potential applications are limited. Although surface coating strategies improve the waterproof stability of fluoride red phosphors, they have downsides. It was found that Nb5+ plays an important role in improving the water resistance of Mn4+-activated oxyfluorides by preventing the hydrolysis of [MnF6]2-. In this work, the influence of Nb5+ on the waterproof stability of Mn4+-activated fluorides was explored. A set of synthesized K2Ta1-xNbxF7:Mn4+ phosphors exhibit tunable and superior water resistance. The photoluminescence (PL) intensity of the representative sample K2Ta0.6Nb0.4F7:5%Mn4+ remains nearly 100% of its initial value even after being immersed in water for 60 min, which is significantly higher than the commercial K2SiF6:Mn4+ red phosphor (8.7%). Our findings open up new possibilities for the development of waterproof fluoride red phosphors. © 2023 Elsevier Ltd and Techna Group S.r.l.",
journal = "Ceramics International",
title = "Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors",
volume = "49",
number = "16",
pages = "27024-27029",
doi = "10.1016/j.ceramint.2023.05.244"
}

Wang, Y., Zhu, Q., Li, J., Milićević, B. R., Zhou, R., Liu, S., Zhang, Q., Huo, J.,& Zhou, J.. (2023). Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors. in Ceramics International, 49(16), 27024-27029.
https://doi.org/10.1016/j.ceramint.2023.05.244

Wang Y, Zhu Q, Li J, Milićević BR, Zhou R, Liu S, Zhang Q, Huo J, Zhou J. Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors. in Ceramics International. 2023;49(16):27024-27029.
doi:10.1016/j.ceramint.2023.05.244 .

Wang, Yunfeng, Zhu, Qijian, Li, Junhao, Milićević, Bojana R., Zhou, Rongfu, Liu, Shuanglai, Zhang, Qiuhong, Huo, Jiansheng, Zhou, Jianbang, "Key role of Nb5+ in achieving water-resistant red emission in K2Ta1-xNbxF7:Mn4+ phosphors" in Ceramics International, 49, no. 16 (2023):27024-27029,
https://doi.org/10.1016/j.ceramint.2023.05.244 . .

TY  - JOUR
AU  - Liu, Feilong
AU  - Yingyuan, Chen
AU  - Milićević, Bojana R.
AU  - Jiang, Chunyan
AU  - Huang, Senchuan
AU  - Zhou, Lei
AU  - Zhou, Jianbang
AU  - Wu, Mingmei
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10605
AB  - A facile strategy to modify the surface of K2SiF6:Mn4+ (KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achieved via two possible mechanisms: in situ decomposition of dark brown manganese (owing to the hydrolysis of [MnF6]2−) on the KSFM crystal surface and consequently the formation of a more protective Mn4+-free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K2SiF6) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K2GeF6:Mn4+ (KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn4+-doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity. © 2023
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance
VL  - 661
DO  - 10.1016/j.colsurfa.2023.130954
ER  - 

@article{
author = "Liu, Feilong and Yingyuan, Chen and Milićević, Bojana R. and Jiang, Chunyan and Huang, Senchuan and Zhou, Lei and Zhou, Jianbang and Wu, Mingmei",
year = "2023",
abstract = "A facile strategy to modify the surface of K2SiF6:Mn4+ (KSFM) with commercially available hydrophilic hydroquinone (HQ) has been developed and waterproof stability (moisture resistance) of the KSFM has been significantly improved. It has been demonstrated that there are strong interactions between KSFM and HQ on the interface due to the hydrogen bonds of fluorine in KSFM with hydrogen in HQ. The relative luminous intensity of HQ-modified KSFM (denoted as KSFM-HQ) remained 99.7% of its initial value after immersion in water for 336 h, remarkable higher than that of KSFM which remained only 38.0%. It is proposed that the high water resistance of KSFM-HQ is achieved via two possible mechanisms: in situ decomposition of dark brown manganese (owing to the hydrolysis of [MnF6]2−) on the KSFM crystal surface and consequently the formation of a more protective Mn4+-free layer. The process effectively combines the advantages of transparent organic materials (herein HQ) before immersion in water and durable moisture resistance of inorganic materials (herein K2SiF6) on surface after immersion in water. The importance of HQ loading on moisture-sensitive fluoride phosphors has been further confirmed by using HQ-treated K2GeF6:Mn4+ (KGFM) as an additional example. This strategy provides a one-of-a-kind way to the development of water-resistant Mn4+-doped fluoride phosphors with high luminous stability for potential applications in water-borne fluorescent anti-counterfeiting ink and even warm WLEDs operating in high humidity. © 2023",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance",
volume = "661",
doi = "10.1016/j.colsurfa.2023.130954"
}

Liu, F., Yingyuan, C., Milićević, B. R., Jiang, C., Huang, S., Zhou, L., Zhou, J.,& Wu, M.. (2023). Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 661.
https://doi.org/10.1016/j.colsurfa.2023.130954

Liu F, Yingyuan C, Milićević BR, Jiang C, Huang S, Zhou L, Zhou J, Wu M. Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2023;661.
doi:10.1016/j.colsurfa.2023.130954 .

Liu, Feilong, Yingyuan, Chen, Milićević, Bojana R., Jiang, Chunyan, Huang, Senchuan, Zhou, Lei, Zhou, Jianbang, Wu, Mingmei, "Hydroquinone-modified Mn4+-activated fluoride red phosphors with improved water-resistance" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 661 (2023),
https://doi.org/10.1016/j.colsurfa.2023.130954 . .

TY  - JOUR
AU  - Zhang, Qiuhong
AU  - Wei, Xiang
AU  - Zhou, Jianbang
AU  - Milićević, Bojana R.
AU  - Lin, Litian
AU  - Huo, Jiansheng
AU  - Li, Junhao
AU  - Ni, Haiyong
AU  - Xia, Zhiguo
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10937
AB  - Technological progress has accelerated the researches into broadband near-infrared (NIR) luminescent materials as next-generation intelligent NIR light sources; however, poor thermal stability restricts the applications of NIR phosphors. Herein, new insights into Cr3+-activated NIR phosphors with improved thermal stability are provided. The photoluminescence intensity originating from the 4T2→4A2 broadband emission of CaLu2Al4SiO12:Cr3+ (CLAS:Cr) with optimal electron occupation (4T2/2E) increases up to 118% at 475 K compared with that at room temperature, which is the best for Cr3+-activated broadband NIR phosphor. Accordingly, new ideas for the design of thermally stable phosphors are proposed by optimizing the thermal population between 4T2 and 2E states and electron migration from 2E to 4T2 state. Finally, multifunctional applications of CLAS:Cr in NIR fluorescence intensity ratio thermometry, X-ray detection, NIR phosphor-converted light-emitting diodes, and bio-imaging are demonstrated.
T2  - Advanced Optical Materials
T1  - Thermal Stability Improvement of Cr3+-Activated Broadband Near-Infrared Phosphors via State Population Optimization
SP  - 2300310
DO  - 10.1002/adom.202300310
ER  - 

@article{
author = "Zhang, Qiuhong and Wei, Xiang and Zhou, Jianbang and Milićević, Bojana R. and Lin, Litian and Huo, Jiansheng and Li, Junhao and Ni, Haiyong and Xia, Zhiguo",
year = "2023",
abstract = "Technological progress has accelerated the researches into broadband near-infrared (NIR) luminescent materials as next-generation intelligent NIR light sources; however, poor thermal stability restricts the applications of NIR phosphors. Herein, new insights into Cr3+-activated NIR phosphors with improved thermal stability are provided. The photoluminescence intensity originating from the 4T2→4A2 broadband emission of CaLu2Al4SiO12:Cr3+ (CLAS:Cr) with optimal electron occupation (4T2/2E) increases up to 118% at 475 K compared with that at room temperature, which is the best for Cr3+-activated broadband NIR phosphor. Accordingly, new ideas for the design of thermally stable phosphors are proposed by optimizing the thermal population between 4T2 and 2E states and electron migration from 2E to 4T2 state. Finally, multifunctional applications of CLAS:Cr in NIR fluorescence intensity ratio thermometry, X-ray detection, NIR phosphor-converted light-emitting diodes, and bio-imaging are demonstrated.",
journal = "Advanced Optical Materials",
title = "Thermal Stability Improvement of Cr3+-Activated Broadband Near-Infrared Phosphors via State Population Optimization",
pages = "2300310",
doi = "10.1002/adom.202300310"
}

Zhang, Q., Wei, X., Zhou, J., Milićević, B. R., Lin, L., Huo, J., Li, J., Ni, H.,& Xia, Z.. (2023). Thermal Stability Improvement of Cr3+-Activated Broadband Near-Infrared Phosphors via State Population Optimization. in Advanced Optical Materials, 2300310.
https://doi.org/10.1002/adom.202300310

Zhang Q, Wei X, Zhou J, Milićević BR, Lin L, Huo J, Li J, Ni H, Xia Z. Thermal Stability Improvement of Cr3+-Activated Broadband Near-Infrared Phosphors via State Population Optimization. in Advanced Optical Materials. 2023;:2300310.
doi:10.1002/adom.202300310 .

Zhang, Qiuhong, Wei, Xiang, Zhou, Jianbang, Milićević, Bojana R., Lin, Litian, Huo, Jiansheng, Li, Junhao, Ni, Haiyong, Xia, Zhiguo, "Thermal Stability Improvement of Cr3+-Activated Broadband Near-Infrared Phosphors via State Population Optimization" in Advanced Optical Materials (2023):2300310,
https://doi.org/10.1002/adom.202300310 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Chen, Yingyuan
AU  - Li, Junhao
AU  - Dramićanin, Miroslav
AU  - Zhou, Jianbang
AU  - Wu, Mingmei
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10148
AB  - We report an organic solvent–assisted (OSA) co-precipitation strategy for the production of Mn4+-activated K2TiF6 phosphor. The phosphor particle size was controlled through the selection of organic solvents with an alcohol functional group and different carbon chain lengths used in the synthesis. The synergistic effect of the organic solvent and hydrofluoric acid results in large smoothed hexagonal-shaped crystal sheets of particles that become larger as the carbon chain length of the organic solvent increases. The photoluminescence (PL) properties of K2TiF6:Mn powders strongly depend on the size and thickness of the particles. The addition of n-butanol during the synthesis increases the emission intensity of K2TiF6:Mn by 208%. The PL quantum efficiency of phosphors prepared using the n-butanol-assisted strategy is much higher (98.2%) than that of conventionally prepared phosphors (89.9%). Our findings demonstrate a way to prepare the K2TiF6:Mn phosphor with targeted morphology and very high quantum efficiency and also provide the route for the optimization of all Mn4+-activated fluoride phosphors used in white light-emitting diodes.
T2  - Dalton Transactions
T1  - Organic solvent-assisted co-precipitation synthesis of red-emitting K2TiF6:Mn phosphors with improved quantum efficiency and optimized morphology
VL  - 51
IS  - 4
SP  - 1378
EP  - 1383
DO  - 10.1039/d1dt03679c
ER  - 

@article{
author = "Milićević, Bojana R. and Chen, Yingyuan and Li, Junhao and Dramićanin, Miroslav and Zhou, Jianbang and Wu, Mingmei",
year = "2022",
abstract = "We report an organic solvent–assisted (OSA) co-precipitation strategy for the production of Mn4+-activated K2TiF6 phosphor. The phosphor particle size was controlled through the selection of organic solvents with an alcohol functional group and different carbon chain lengths used in the synthesis. The synergistic effect of the organic solvent and hydrofluoric acid results in large smoothed hexagonal-shaped crystal sheets of particles that become larger as the carbon chain length of the organic solvent increases. The photoluminescence (PL) properties of K2TiF6:Mn powders strongly depend on the size and thickness of the particles. The addition of n-butanol during the synthesis increases the emission intensity of K2TiF6:Mn by 208%. The PL quantum efficiency of phosphors prepared using the n-butanol-assisted strategy is much higher (98.2%) than that of conventionally prepared phosphors (89.9%). Our findings demonstrate a way to prepare the K2TiF6:Mn phosphor with targeted morphology and very high quantum efficiency and also provide the route for the optimization of all Mn4+-activated fluoride phosphors used in white light-emitting diodes.",
journal = "Dalton Transactions",
title = "Organic solvent-assisted co-precipitation synthesis of red-emitting K2TiF6:Mn phosphors with improved quantum efficiency and optimized morphology",
volume = "51",
number = "4",
pages = "1378-1383",
doi = "10.1039/d1dt03679c"
}

Milićević, B. R., Chen, Y., Li, J., Dramićanin, M., Zhou, J.,& Wu, M.. (2022). Organic solvent-assisted co-precipitation synthesis of red-emitting K2TiF6:Mn phosphors with improved quantum efficiency and optimized morphology. in Dalton Transactions, 51(4), 1378-1383.
https://doi.org/10.1039/d1dt03679c

Milićević BR, Chen Y, Li J, Dramićanin M, Zhou J, Wu M. Organic solvent-assisted co-precipitation synthesis of red-emitting K2TiF6:Mn phosphors with improved quantum efficiency and optimized morphology. in Dalton Transactions. 2022;51(4):1378-1383.
doi:10.1039/d1dt03679c .

Milićević, Bojana R., Chen, Yingyuan, Li, Junhao, Dramićanin, Miroslav, Zhou, Jianbang, Wu, Mingmei, "Organic solvent-assisted co-precipitation synthesis of red-emitting K2TiF6:Mn phosphors with improved quantum efficiency and optimized morphology" in Dalton Transactions, 51, no. 4 (2022):1378-1383,
https://doi.org/10.1039/d1dt03679c . .

TY  - JOUR
AU  - Zhou, Jianbang
AU  - Liu, Feilong
AU  - Li, Junhao
AU  - Milićević, Bojana R.
AU  - Yan, Jing
AU  - Wu, Zhanchao
AU  - Wu, Mingmei
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9798
AB  - Mn4+-activated fluorides rank among the most significant red phosphors for white light emitting diodes (LEDs) with enhanced color rendition, while their poor moisture resistance hinders further application. Surface coating with a protective layer is general approach to improving moisture resistance. However, these methods usually suffer from complex post-processing and poor shell stability. Herein, the introduction of passivation ions (Nb5+) may suppress the hydrolysis of [MnF6]2–, which provides a facile approach to obtaining moisture-resistant fluoride phosphors. Compared to K2TiF6:5.0%Mn4+, the moisture resistance and luminescence intensity of K2Ti0.949Nb0.051F6.051:5.0%Mn4+ improved significantly following the addition of Nb5+. In addition, the combination of as-prepared K2Ti0.949Nb0.051F6.051:5.0%Mn4+ red phosphor, YAG:Ce yellow phosphor and blue-chip enables the production of warm white LEDs with excellent color rendition (Ra = 90.2), low correlated color temperature (CCT = 3816 K), and high luminous efficacy (132.2 lm/W). © 2021
T2  - Optical Materials
T1  - A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification
VL  - 117
DO  - 10.1016/j.optmat.2021.111184
ER  - 

@article{
author = "Zhou, Jianbang and Liu, Feilong and Li, Junhao and Milićević, Bojana R. and Yan, Jing and Wu, Zhanchao and Wu, Mingmei",
year = "2021",
abstract = "Mn4+-activated fluorides rank among the most significant red phosphors for white light emitting diodes (LEDs) with enhanced color rendition, while their poor moisture resistance hinders further application. Surface coating with a protective layer is general approach to improving moisture resistance. However, these methods usually suffer from complex post-processing and poor shell stability. Herein, the introduction of passivation ions (Nb5+) may suppress the hydrolysis of [MnF6]2–, which provides a facile approach to obtaining moisture-resistant fluoride phosphors. Compared to K2TiF6:5.0%Mn4+, the moisture resistance and luminescence intensity of K2Ti0.949Nb0.051F6.051:5.0%Mn4+ improved significantly following the addition of Nb5+. In addition, the combination of as-prepared K2Ti0.949Nb0.051F6.051:5.0%Mn4+ red phosphor, YAG:Ce yellow phosphor and blue-chip enables the production of warm white LEDs with excellent color rendition (Ra = 90.2), low correlated color temperature (CCT = 3816 K), and high luminous efficacy (132.2 lm/W). © 2021",
journal = "Optical Materials",
title = "A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification",
volume = "117",
doi = "10.1016/j.optmat.2021.111184"
}

Zhou, J., Liu, F., Li, J., Milićević, B. R., Yan, J., Wu, Z.,& Wu, M.. (2021). A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification. in Optical Materials, 117.
https://doi.org/10.1016/j.optmat.2021.111184

Zhou J, Liu F, Li J, Milićević BR, Yan J, Wu Z, Wu M. A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification. in Optical Materials. 2021;117.
doi:10.1016/j.optmat.2021.111184 .

Zhou, Jianbang, Liu, Feilong, Li, Junhao, Milićević, Bojana R., Yan, Jing, Wu, Zhanchao, Wu, Mingmei, "A facile self-passivation strategy for improving moisture-resistance of fluoride red phosphors without surface modification" in Optical Materials, 117 (2021),
https://doi.org/10.1016/j.optmat.2021.111184 . .

TY  - JOUR
AU  - Dramićanin, Miroslav
AU  - Milićević, Bojana R.
AU  - Đorđević, Vesna R.
AU  - Ristić, Zoran
AU  - Zhou, Jianbang
AU  - Milivojević, Dušan
AU  - Papan, Jelena
AU  - Brik, Mikhail G.
AU  - Ma, Chong‐Geng
AU  - Srivastava, Alok M
AU  - Wu, Mingmei
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8360
AB  - Luminescence of monoclinic lithium metatitanate (Li2TiO3) powders activated with different quantities of Mn4+ is studied in detail. Its strong deep-red emission arising from the Mn4+ 2Eg → 4A2g spin forbidden transition is centered at around 688 nm and is suitable for luminescence thermometry. Structural and electron paramagnetic resonance analyses show that Mn4+ ions are equally distributed in two almost identical Ti4+ sites in which they are octahedrally coordinated by six oxygen ions. Calculations based on the exchange charge model of the crystal field provided values of Racah parameters (B=760 cm−1, C= 2993 cm−1), crystal-field splitting Dq= 2043 cm−1, and the nephelauxetic parameter β1=0.9775. The maximal quantum efficiency of 24.1% at room temperature is found for 0.126% Mn4+ concentration. Temperature quenching of emission occurs by a cross-over via 4T2 excited state of the Mn4+ ions with T1/2=262 K and is quite favorable for the application in the lifetime-based luminescence thermometry since relative changes in emission decay values are exceptionally-large (around 3.21% at room temperature). We derived theoretical expressions for the temperature dependence of the absolute and relative sensitivities and discuss the influence of host material properties on lifetime sensitivities. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
T2  - ChemistrySelect
T1  - Li2TiO3:Mn4+ Deep‐Red Phosphor for the Lifetime‐Based Luminescence Thermometry
VL  - 4
IS  - 24
SP  - 7067
EP  - 7075
DO  - 10.1002/slct.201901590
ER  - 

@article{
author = "Dramićanin, Miroslav and Milićević, Bojana R. and Đorđević, Vesna R. and Ristić, Zoran and Zhou, Jianbang and Milivojević, Dušan and Papan, Jelena and Brik, Mikhail G. and Ma, Chong‐Geng and Srivastava, Alok M and Wu, Mingmei",
year = "2019",
abstract = "Luminescence of monoclinic lithium metatitanate (Li2TiO3) powders activated with different quantities of Mn4+ is studied in detail. Its strong deep-red emission arising from the Mn4+ 2Eg → 4A2g spin forbidden transition is centered at around 688 nm and is suitable for luminescence thermometry. Structural and electron paramagnetic resonance analyses show that Mn4+ ions are equally distributed in two almost identical Ti4+ sites in which they are octahedrally coordinated by six oxygen ions. Calculations based on the exchange charge model of the crystal field provided values of Racah parameters (B=760 cm−1, C= 2993 cm−1), crystal-field splitting Dq= 2043 cm−1, and the nephelauxetic parameter β1=0.9775. The maximal quantum efficiency of 24.1% at room temperature is found for 0.126% Mn4+ concentration. Temperature quenching of emission occurs by a cross-over via 4T2 excited state of the Mn4+ ions with T1/2=262 K and is quite favorable for the application in the lifetime-based luminescence thermometry since relative changes in emission decay values are exceptionally-large (around 3.21% at room temperature). We derived theoretical expressions for the temperature dependence of the absolute and relative sensitivities and discuss the influence of host material properties on lifetime sensitivities. © 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim",
journal = "ChemistrySelect",
title = "Li2TiO3:Mn4+ Deep‐Red Phosphor for the Lifetime‐Based Luminescence Thermometry",
volume = "4",
number = "24",
pages = "7067-7075",
doi = "10.1002/slct.201901590"
}

Dramićanin, M., Milićević, B. R., Đorđević, V. R., Ristić, Z., Zhou, J., Milivojević, D., Papan, J., Brik, M. G., Ma, C., Srivastava, A. M.,& Wu, M.. (2019). Li2TiO3:Mn4+ Deep‐Red Phosphor for the Lifetime‐Based Luminescence Thermometry. in ChemistrySelect, 4(24), 7067-7075.
https://doi.org/10.1002/slct.201901590

Dramićanin M, Milićević BR, Đorđević VR, Ristić Z, Zhou J, Milivojević D, Papan J, Brik MG, Ma C, Srivastava AM, Wu M. Li2TiO3:Mn4+ Deep‐Red Phosphor for the Lifetime‐Based Luminescence Thermometry. in ChemistrySelect. 2019;4(24):7067-7075.
doi:10.1002/slct.201901590 .

Dramićanin, Miroslav, Milićević, Bojana R., Đorđević, Vesna R., Ristić, Zoran, Zhou, Jianbang, Milivojević, Dušan, Papan, Jelena, Brik, Mikhail G., Ma, Chong‐Geng, Srivastava, Alok M, Wu, Mingmei, "Li2TiO3:Mn4+ Deep‐Red Phosphor for the Lifetime‐Based Luminescence Thermometry" in ChemistrySelect, 4, no. 24 (2019):7067-7075,
https://doi.org/10.1002/slct.201901590 . .

TY  - JOUR
AU  - Sekulić, Milica
AU  - Ristić, Zoran
AU  - Milićević, Bojana R.
AU  - Antić, Željka
AU  - Đorđević, Vesna R.
AU  - Dramićanin, Miroslav
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8421
AB  - In this work, the potential of Li1.8Na0.2TiO3:Mn4+ for the lifetime-based luminescence thermometry is assessed. The material is prepared by the solid-state reaction of Li2CO3, Na2CO3, and nanostructured TiO2 at 800 °C, and its monoclinic structure (space group C2/c) is confirmed by X-ray diffraction analysis. In this host, Mn4+ provides strong absorption around 330 nm and 500 nm due to 4A2g → 4T1g and 4A2g→ 4T2g electric dipole forbidden and spin-allowed electron transitions, respectively, and emits around 679 nm on account of 2Eg→ 4A2g spin forbidden electron transition. Temperature dependences of emission intensity and emission decay are measured over the 10–350 K range. Due to the low value of energy of 4T2g level (20000 cm−1), the strong emission quenching starts at low-temperatures which favors the use of this material for the luminescence thermometry. It is demonstrated that the quite large value of relative sensitivity (2.27% K−1@330 K) facilitates temperature measurements with temperature resolution better than 0.15 K, and with the excellent repeatability. © 2019 Elsevier B.V.
T2  - Optics Communications
T1  - Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry
VL  - 452
SP  - 342
EP  - 346
DO  - 10.1016/j.optcom.2019.07.056
ER  - 

@article{
author = "Sekulić, Milica and Ristić, Zoran and Milićević, Bojana R. and Antić, Željka and Đorđević, Vesna R. and Dramićanin, Miroslav",
year = "2019",
abstract = "In this work, the potential of Li1.8Na0.2TiO3:Mn4+ for the lifetime-based luminescence thermometry is assessed. The material is prepared by the solid-state reaction of Li2CO3, Na2CO3, and nanostructured TiO2 at 800 °C, and its monoclinic structure (space group C2/c) is confirmed by X-ray diffraction analysis. In this host, Mn4+ provides strong absorption around 330 nm and 500 nm due to 4A2g → 4T1g and 4A2g→ 4T2g electric dipole forbidden and spin-allowed electron transitions, respectively, and emits around 679 nm on account of 2Eg→ 4A2g spin forbidden electron transition. Temperature dependences of emission intensity and emission decay are measured over the 10–350 K range. Due to the low value of energy of 4T2g level (20000 cm−1), the strong emission quenching starts at low-temperatures which favors the use of this material for the luminescence thermometry. It is demonstrated that the quite large value of relative sensitivity (2.27% K−1@330 K) facilitates temperature measurements with temperature resolution better than 0.15 K, and with the excellent repeatability. © 2019 Elsevier B.V.",
journal = "Optics Communications",
title = "Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry",
volume = "452",
pages = "342-346",
doi = "10.1016/j.optcom.2019.07.056"
}

Sekulić, M., Ristić, Z., Milićević, B. R., Antić, Ž., Đorđević, V. R.,& Dramićanin, M.. (2019). Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry. in Optics Communications, 452, 342-346.
https://doi.org/10.1016/j.optcom.2019.07.056

Sekulić M, Ristić Z, Milićević BR, Antić Ž, Đorđević VR, Dramićanin M. Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry. in Optics Communications. 2019;452:342-346.
doi:10.1016/j.optcom.2019.07.056 .

Sekulić, Milica, Ristić, Zoran, Milićević, Bojana R., Antić, Željka, Đorđević, Vesna R., Dramićanin, Miroslav, "Li1.8Na0.2TiO3:Mn4+: The highly sensitive probe for the low-temperature lifetime-based luminescence thermometry" in Optics Communications, 452 (2019):342-346,
https://doi.org/10.1016/j.optcom.2019.07.056 . .

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  - Li, Xiaohui
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
AU  - Jing, Xiping
AU  - Tang, Qiang
AU  - Shi, Jianxin
AU  - Wu, Mingmei
PY  - 2019
UR  - http://xlink.rsc.org/?DOI=C9TC00159J
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8087
AB  - Single-component white light phosphors with a broad and full color spectrum are urgently required to overcome residual problems with commercial phosphors. In this paper, we describe how Eu3+, as the dopant of Sr3ZnTa2O9 (SZT), plays an important role in structural modulation (including structural order-disorder and intrinsic oxygen defects), as demonstrated by electronic structural calculations and systematic experiments. Furthermore, D-5(0) F-7(2) emission of Eu3+ provides the red component of the emission spectrum and increases the color rendering index of SZT:Eu3+ phosphors. Consequently, the resulting phosphor SZT:10%Eu3+ shows significantly enhanced emission intensity, and its broadband emission covers the entire visible region from 400 nm to 720 nm. A fabricated LED device using a near-ultraviolet 370 nm chip coated with a single-component, the SZT:10%Eu3+ phosphor, shows warm white emission with a high color rendering index (R-a = 82).
T2  - Journal of Materials Chemistry C
T1  - Eu3+-Activated Sr3ZnTa2O9 single-component white light phosphors: emission intensity enhancement and color rendering improvement
VL  - 7
IS  - 9
SP  - 2596
EP  - 2603
DO  - 10.1039/C9TC00159J
ER  - 

@article{
author = "Li, Xiaohui and Milićević, Bojana R. and Dramićanin, Miroslav and Jing, Xiping and Tang, Qiang and Shi, Jianxin and Wu, Mingmei",
year = "2019",
abstract = "Single-component white light phosphors with a broad and full color spectrum are urgently required to overcome residual problems with commercial phosphors. In this paper, we describe how Eu3+, as the dopant of Sr3ZnTa2O9 (SZT), plays an important role in structural modulation (including structural order-disorder and intrinsic oxygen defects), as demonstrated by electronic structural calculations and systematic experiments. Furthermore, D-5(0) F-7(2) emission of Eu3+ provides the red component of the emission spectrum and increases the color rendering index of SZT:Eu3+ phosphors. Consequently, the resulting phosphor SZT:10%Eu3+ shows significantly enhanced emission intensity, and its broadband emission covers the entire visible region from 400 nm to 720 nm. A fabricated LED device using a near-ultraviolet 370 nm chip coated with a single-component, the SZT:10%Eu3+ phosphor, shows warm white emission with a high color rendering index (R-a = 82).",
journal = "Journal of Materials Chemistry C",
title = "Eu3+-Activated Sr3ZnTa2O9 single-component white light phosphors: emission intensity enhancement and color rendering improvement",
volume = "7",
number = "9",
pages = "2596-2603",
doi = "10.1039/C9TC00159J"
}

Li, X., Milićević, B. R., Dramićanin, M., Jing, X., Tang, Q., Shi, J.,& Wu, M.. (2019). Eu3+-Activated Sr3ZnTa2O9 single-component white light phosphors: emission intensity enhancement and color rendering improvement. in Journal of Materials Chemistry C, 7(9), 2596-2603.
https://doi.org/10.1039/C9TC00159J

Li X, Milićević BR, Dramićanin M, Jing X, Tang Q, Shi J, Wu M. Eu3+-Activated Sr3ZnTa2O9 single-component white light phosphors: emission intensity enhancement and color rendering improvement. in Journal of Materials Chemistry C. 2019;7(9):2596-2603.
doi:10.1039/C9TC00159J .

Li, Xiaohui, Milićević, Bojana R., Dramićanin, Miroslav, Jing, Xiping, Tang, Qiang, Shi, Jianxin, Wu, Mingmei, "Eu3+-Activated Sr3ZnTa2O9 single-component white light phosphors: emission intensity enhancement and color rendering improvement" in Journal of Materials Chemistry C, 7, no. 9 (2019):2596-2603,
https://doi.org/10.1039/C9TC00159J . .

TY  - JOUR
AU  - Yan, Jing
AU  - Zhang, Ziwang
AU  - Milićević, Bojana R.
AU  - Li, Junhao
AU  - Liang, Qiongyun
AU  - Zhou, Jianbang
AU  - Wang, Yunfeng
AU  - Shi, Jianxin
AU  - Wu, Mingmei
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8346
AB  - The local crystal structure engineering becomes an important strategy to design new phosphors with enhanced optical and thermal performance of white light-emitting diodes. Herein, a series of Na3Sc2(PO4)3: Eu2+ and KyNa2.97-ySc2(PO4)3: 0.03Eu2+ phosphors were synthesized via traditional high temperature solid-state reaction method. X-ray powder diffraction analysis and Rietveld refinement provide insight in the detailed crystal structure. Furthermore, Eu2+ doped Na3Sc2(PO4)3 exhibits bright blue emission in 400–540 nm spectral range with a maximum value at ~ 460 nm under n-UV light excitation. The concentration quenching mechanism of Eu2+ in Na3Sc2(PO4)3 is certified to be a dipole-dipole interaction. Additionally, crystal structure tailoring is a potential strategy to design new phosphors for particular applications. Therefore, the effects of K+ substitution on the structure and photoluminescence of Eu2+ activated Na3Sc2(PO4)3 is presented in detail. Rietveld refinement data revealed that unit cell volume and Na/K–O band length increase when K+ occupy the Na+ sites. This sensitive local structure resulted in a considerable enhancement of the photoluminescence intensity of Eu2+. Incorporation of K+ in the crystal structure is a feasible route to realize fine-tuning of emission color and broaden the color gamut. In the meantime, Na2.7K0.27Sc2(PO4)3: 0.03Eu2+ phosphor exhibits excellent thermal stability at high temperature over a significant radiative recombination of energy transfer from traps to Eu2+. These results confirm that Na2.7K0.27Sc2(PO4)3: 0.03Eu2+ phosphor might be used as a blue component in n-UV chip activated white light-emitting diodes for the next-generation of indoor solid-state lighting applications. © 2019 Elsevier B.V.
T2  - Optical Materials
T1  - The enhancement of emission intensity and enlargement of color gamut by a simple local structure substitution with highly thermal stability preserved
VL  - 95
SP  - 109201
DO  - 10.1016/j.optmat.2019.109201
ER  - 

@article{
author = "Yan, Jing and Zhang, Ziwang and Milićević, Bojana R. and Li, Junhao and Liang, Qiongyun and Zhou, Jianbang and Wang, Yunfeng and Shi, Jianxin and Wu, Mingmei",
year = "2019",
abstract = "The local crystal structure engineering becomes an important strategy to design new phosphors with enhanced optical and thermal performance of white light-emitting diodes. Herein, a series of Na3Sc2(PO4)3: Eu2+ and KyNa2.97-ySc2(PO4)3: 0.03Eu2+ phosphors were synthesized via traditional high temperature solid-state reaction method. X-ray powder diffraction analysis and Rietveld refinement provide insight in the detailed crystal structure. Furthermore, Eu2+ doped Na3Sc2(PO4)3 exhibits bright blue emission in 400–540 nm spectral range with a maximum value at ~ 460 nm under n-UV light excitation. The concentration quenching mechanism of Eu2+ in Na3Sc2(PO4)3 is certified to be a dipole-dipole interaction. Additionally, crystal structure tailoring is a potential strategy to design new phosphors for particular applications. Therefore, the effects of K+ substitution on the structure and photoluminescence of Eu2+ activated Na3Sc2(PO4)3 is presented in detail. Rietveld refinement data revealed that unit cell volume and Na/K–O band length increase when K+ occupy the Na+ sites. This sensitive local structure resulted in a considerable enhancement of the photoluminescence intensity of Eu2+. Incorporation of K+ in the crystal structure is a feasible route to realize fine-tuning of emission color and broaden the color gamut. In the meantime, Na2.7K0.27Sc2(PO4)3: 0.03Eu2+ phosphor exhibits excellent thermal stability at high temperature over a significant radiative recombination of energy transfer from traps to Eu2+. These results confirm that Na2.7K0.27Sc2(PO4)3: 0.03Eu2+ phosphor might be used as a blue component in n-UV chip activated white light-emitting diodes for the next-generation of indoor solid-state lighting applications. © 2019 Elsevier B.V.",
journal = "Optical Materials",
title = "The enhancement of emission intensity and enlargement of color gamut by a simple local structure substitution with highly thermal stability preserved",
volume = "95",
pages = "109201",
doi = "10.1016/j.optmat.2019.109201"
}

Yan, J., Zhang, Z., Milićević, B. R., Li, J., Liang, Q., Zhou, J., Wang, Y., Shi, J.,& Wu, M.. (2019). The enhancement of emission intensity and enlargement of color gamut by a simple local structure substitution with highly thermal stability preserved. in Optical Materials, 95, 109201.
https://doi.org/10.1016/j.optmat.2019.109201

Yan J, Zhang Z, Milićević BR, Li J, Liang Q, Zhou J, Wang Y, Shi J, Wu M. The enhancement of emission intensity and enlargement of color gamut by a simple local structure substitution with highly thermal stability preserved. in Optical Materials. 2019;95:109201.
doi:10.1016/j.optmat.2019.109201 .

Yan, Jing, Zhang, Ziwang, Milićević, Bojana R., Li, Junhao, Liang, Qiongyun, Zhou, Jianbang, Wang, Yunfeng, Shi, Jianxin, Wu, Mingmei, "The enhancement of emission intensity and enlargement of color gamut by a simple local structure substitution with highly thermal stability preserved" in Optical Materials, 95 (2019):109201,
https://doi.org/10.1016/j.optmat.2019.109201 . .

TY  - JOUR
AU  - Kovač, Tijana S.
AU  - Džunuzović, Enis S.
AU  - Džunuzović, Jasna V.
AU  - Milićević, Bojana R.
AU  - Sredojević, Dušan
AU  - Brothers, Edward N.
AU  - Nedeljković, Jovan
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0352-51391800044K
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7934
AB  - Surface modification of titanium dioxide nanoparticles (TiO2 NPs) with the biologically active molecule pyridoxine hydrochloride (vitamin B-6) was found to alter the optical properties. Microstructural characterization involving transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis revealed that the anatase TiO2 NPs had a narrow size distribution with an average diameter of 45 angstrom. The absorption onset of the surface-modified TiO2 samples was red-shifted by about 0.4 eV compared to the unmodified particles. The mode of binding between vitamin B-6 and the surface Ti atoms was investigated by Fourier transform infrared spectroscopy (FTIR). From the Benesi-Hildebrand plot, the stability constant of the surface complex was found to be of the order 10(2) M-1. The experimental findings were supported by detailed quantum chemical calculations based on the density functional theory (DFT). Agreement was found between the experimentally measured absorption spectra of the TiO2 NPs surface-modified with vitamin B-6 and the theoretically calculated electronic excitation spectra of the corresponding model system.
T2  - Journal of the Serbian Chemical Society
T1  - Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study
VL  - 83
IS  - 7-8
SP  - 899
EP  - 909
DO  - 10.2298/JSC180131044K
ER  - 

@article{
author = "Kovač, Tijana S. and Džunuzović, Enis S. and Džunuzović, Jasna V. and Milićević, Bojana R. and Sredojević, Dušan and Brothers, Edward N. and Nedeljković, Jovan",
year = "2018",
abstract = "Surface modification of titanium dioxide nanoparticles (TiO2 NPs) with the biologically active molecule pyridoxine hydrochloride (vitamin B-6) was found to alter the optical properties. Microstructural characterization involving transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis revealed that the anatase TiO2 NPs had a narrow size distribution with an average diameter of 45 angstrom. The absorption onset of the surface-modified TiO2 samples was red-shifted by about 0.4 eV compared to the unmodified particles. The mode of binding between vitamin B-6 and the surface Ti atoms was investigated by Fourier transform infrared spectroscopy (FTIR). From the Benesi-Hildebrand plot, the stability constant of the surface complex was found to be of the order 10(2) M-1. The experimental findings were supported by detailed quantum chemical calculations based on the density functional theory (DFT). Agreement was found between the experimentally measured absorption spectra of the TiO2 NPs surface-modified with vitamin B-6 and the theoretically calculated electronic excitation spectra of the corresponding model system.",
journal = "Journal of the Serbian Chemical Society",
title = "Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study",
volume = "83",
number = "7-8",
pages = "899-909",
doi = "10.2298/JSC180131044K"
}

Kovač, T. S., Džunuzović, E. S., Džunuzović, J. V., Milićević, B. R., Sredojević, D., Brothers, E. N.,& Nedeljković, J.. (2018). Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study. in Journal of the Serbian Chemical Society, 83(7-8), 899-909.
https://doi.org/10.2298/JSC180131044K

Kovač TS, Džunuzović ES, Džunuzović JV, Milićević BR, Sredojević D, Brothers EN, Nedeljković J. Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study. in Journal of the Serbian Chemical Society. 2018;83(7-8):899-909.
doi:10.2298/JSC180131044K .

Kovač, Tijana S., Džunuzović, Enis S., Džunuzović, Jasna V., Milićević, Bojana R., Sredojević, Dušan, Brothers, Edward N., Nedeljković, Jovan, "Visible light absorption of TiO2 nanoparticles surface-modified with vitamin B6: A comparative experimental and DFT study" in Journal of the Serbian Chemical Society, 83, no. 7-8 (2018):899-909,
https://doi.org/10.2298/JSC180131044K . .

TY  - JOUR
AU  - Antonov, Milica
AU  - Lenhardt, Lea I.
AU  - Manojlović, Dragica
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - http://www.doiserbia.nb.rs/Article.aspx?ID=0042-84501600394A
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7927
AB  - Background/Aim. Discoloration of dental restorations makes them aesthetically unacceptable and is a frequent reason for replacement of composite restorations. The aim of this study was to evaluate changes of color and fluorescence of resin-based composites (RBCs) exposed to natural juices and energy drinks. Methods. Microhybrid composite Gradia Direct™ Extra Bleach White disc-shaped specimens (n = 35) were immersed in three different natural juices and four different energy drinks. Absorption spectra of natural juices and energy drinks, diffuse reflection and fluorescence of composite samples were measured prior and after seven-day immersion by spectrophotometer Thermo Evolution 600 and spectrofluorometer Fluorolog-3-221. Composite’s color was calculated from diffuse reflection spectra and expressed in CIELAB color space (Commission International de l’Eclairage). Results. All natural juices and energy drinks induced color change of resin based composites, but to the different extent. Only aronia and carrot juices induced total color change considerably higher than clinically acceptable threshold, 9.3 and 6.2, respectively. All energy drinks and aronia juice induced notable decrease in fluorescence; the highest change of 28% was evidenced in the case of aronia juice. Conclusion. Change of color and fluorescence will appear differently with various solutions due to different chemical composition and concentration of colorant species in different beverages. Solutions with higher optical absorption induced higher total color change. Discoloration of composites in aronia and carrot juices is similar to those earlier reported for red wine, tea and coffee.
T2  - Vojnosanitetski pregled
T1  - Discoloration of resin based composites in natural juices and energy drinks
T1  - Prebojavanje kompozita prirodnim sokovima i energetskim pićima
VL  - 75
IS  - 8
SP  - 787
EP  - 794
DO  - 10.2298/VSP161018394A
ER  - 

@article{
author = "Antonov, Milica and Lenhardt, Lea I. and Manojlović, Dragica and Milićević, Bojana R. and Dramićanin, Miroslav",
year = "2018",
abstract = "Background/Aim. Discoloration of dental restorations makes them aesthetically unacceptable and is a frequent reason for replacement of composite restorations. The aim of this study was to evaluate changes of color and fluorescence of resin-based composites (RBCs) exposed to natural juices and energy drinks. Methods. Microhybrid composite Gradia Direct™ Extra Bleach White disc-shaped specimens (n = 35) were immersed in three different natural juices and four different energy drinks. Absorption spectra of natural juices and energy drinks, diffuse reflection and fluorescence of composite samples were measured prior and after seven-day immersion by spectrophotometer Thermo Evolution 600 and spectrofluorometer Fluorolog-3-221. Composite’s color was calculated from diffuse reflection spectra and expressed in CIELAB color space (Commission International de l’Eclairage). Results. All natural juices and energy drinks induced color change of resin based composites, but to the different extent. Only aronia and carrot juices induced total color change considerably higher than clinically acceptable threshold, 9.3 and 6.2, respectively. All energy drinks and aronia juice induced notable decrease in fluorescence; the highest change of 28% was evidenced in the case of aronia juice. Conclusion. Change of color and fluorescence will appear differently with various solutions due to different chemical composition and concentration of colorant species in different beverages. Solutions with higher optical absorption induced higher total color change. Discoloration of composites in aronia and carrot juices is similar to those earlier reported for red wine, tea and coffee.",
journal = "Vojnosanitetski pregled",
title = "Discoloration of resin based composites in natural juices and energy drinks, Prebojavanje kompozita prirodnim sokovima i energetskim pićima",
volume = "75",
number = "8",
pages = "787-794",
doi = "10.2298/VSP161018394A"
}

Antonov, M., Lenhardt, L. I., Manojlović, D., Milićević, B. R.,& Dramićanin, M.. (2018). Discoloration of resin based composites in natural juices and energy drinks. in Vojnosanitetski pregled, 75(8), 787-794.
https://doi.org/10.2298/VSP161018394A

Antonov M, Lenhardt LI, Manojlović D, Milićević BR, Dramićanin M. Discoloration of resin based composites in natural juices and energy drinks. in Vojnosanitetski pregled. 2018;75(8):787-794.
doi:10.2298/VSP161018394A .

Antonov, Milica, Lenhardt, Lea I., Manojlović, Dragica, Milićević, Bojana R., Dramićanin, Miroslav, "Discoloration of resin based composites in natural juices and energy drinks" in Vojnosanitetski pregled, 75, no. 8 (2018):787-794,
https://doi.org/10.2298/VSP161018394A . .

TY  - JOUR
AU  - Vujčić, Ivica
AU  - Gavrilović, Tamara V.
AU  - Sekulić, Milica
AU  - Mašić, Slobodan
AU  - Milićević, Bojana R.
AU  - Dramićanin, Miroslav
AU  - Đorđević, Vesna R.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7964
AB  - YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
T2  - Radiation Effects and Defects in Solids
T1  - Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors
VL  - 173
IS  - 11-12
SP  - 1054
EP  - 1067
DO  - 10.1080/10420150.2018.1539722
ER  - 

@article{
author = "Vujčić, Ivica and Gavrilović, Tamara V. and Sekulić, Milica and Mašić, Slobodan and Milićević, Bojana R. and Dramićanin, Miroslav and Đorđević, Vesna R.",
year = "2018",
abstract = "YPO4 phosphors doped with trivalent ion Pr3+ were prepared by sol–gel method and treated with different doses of gamma radiation, from 0.25 MGy to 4 MGy. Effects of radiation on morphology, structure and luminescent properties were analyzed. Also, the influence of radiation on the change in the color of the samples was examined. The color efficiency of powders was evaluated by colorimetric analysis (CIE and L * a * b system). It has been observed that powders change color under the influence of radiation, i.e. they pass from white to pinkish red. Also, it has been determined that the radiation affects morphology change, as the particle size increases with increasing of the radiation dose. With the increase in the radiation dose, the emission intensity of samples decreases. The structure remains almost unchanged after irradiation, and the intensity constantly decreases with increasing of dose. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.",
journal = "Radiation Effects and Defects in Solids",
title = "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors",
volume = "173",
number = "11-12",
pages = "1054-1067",
doi = "10.1080/10420150.2018.1539722"
}

Vujčić, I., Gavrilović, T. V., Sekulić, M., Mašić, S., Milićević, B. R., Dramićanin, M.,& Đorđević, V. R.. (2018). Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids, 173(11-12), 1054-1067.
https://doi.org/10.1080/10420150.2018.1539722

Vujčić I, Gavrilović TV, Sekulić M, Mašić S, Milićević BR, Dramićanin M, Đorđević VR. Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors. in Radiation Effects and Defects in Solids. 2018;173(11-12):1054-1067.
doi:10.1080/10420150.2018.1539722 .

Vujčić, Ivica, Gavrilović, Tamara V., Sekulić, Milica, Mašić, Slobodan, Milićević, Bojana R., Dramićanin, Miroslav, Đorđević, Vesna R., "Radiation effects on luminescent and structural properties of YPO4: Pr3+ nanophosphors" in Radiation Effects and Defects in Solids, 173, no. 11-12 (2018):1054-1067,
https://doi.org/10.1080/10420150.2018.1539722 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Kuzman, Sanja
AU  - Porobić, Slavica
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7198
AB  - The systematic investigation of crystallization kinetics of heavy-group lanthanide dititanate pyrochlores, HL2Ti2O7 (HL=Lu, Tm, Er, Ho, Y, Dy, and Tb) is presented. Materials are prepared by the Pechini-type polymerized complex route, and their thermal properties were studied by differential thermal analysis under non-isothermal conditions. For this group, the crystallization temperature became larger with increasing the ionic radius of lanthanides, from 1066 K for Lu2Ti2O7 to 1125 K for Tb2Ti2O7. The linear dependence of crystallization temperature on radius of heavy lanthanide ions is found to follows T-c [K] = 168.86 + 920.89 x r(ion) [angstrom] semi-empirical equation. Apparent activation energies of crystallization were obtained from calculations based on the Arrhenius equation, isoconversional method and PerezMaqueda method, and are similar to 805 kJ mol(-1) calculated by three different methods. The crystallization kinetics followed the so-called Avrami Erofeev (A3) model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda methods. The crystallization mechanism of all lanthanide dititanate pyrochlores is found to be the same, and the crystallization process involves a constant rate of nucleation and two-dimensional growth of nuclei. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates
VL  - 74
SP  - 86
EP  - 92
DO  - 10.1016/j.optmat.2017.03.058
ER  - 

@article{
author = "Milićević, Bojana R. and Kuzman, Sanja and Porobić, Slavica and Marinović-Cincović, Milena and Dramićanin, Miroslav",
year = "2017",
abstract = "The systematic investigation of crystallization kinetics of heavy-group lanthanide dititanate pyrochlores, HL2Ti2O7 (HL=Lu, Tm, Er, Ho, Y, Dy, and Tb) is presented. Materials are prepared by the Pechini-type polymerized complex route, and their thermal properties were studied by differential thermal analysis under non-isothermal conditions. For this group, the crystallization temperature became larger with increasing the ionic radius of lanthanides, from 1066 K for Lu2Ti2O7 to 1125 K for Tb2Ti2O7. The linear dependence of crystallization temperature on radius of heavy lanthanide ions is found to follows T-c [K] = 168.86 + 920.89 x r(ion) [angstrom] semi-empirical equation. Apparent activation energies of crystallization were obtained from calculations based on the Arrhenius equation, isoconversional method and PerezMaqueda method, and are similar to 805 kJ mol(-1) calculated by three different methods. The crystallization kinetics followed the so-called Avrami Erofeev (A3) model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda methods. The crystallization mechanism of all lanthanide dititanate pyrochlores is found to be the same, and the crystallization process involves a constant rate of nucleation and two-dimensional growth of nuclei. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates",
volume = "74",
pages = "86-92",
doi = "10.1016/j.optmat.2017.03.058"
}

Milićević, B. R., Kuzman, S., Porobić, S., Marinović-Cincović, M.,& Dramićanin, M.. (2017). Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates. in Optical Materials, 74, 86-92.
https://doi.org/10.1016/j.optmat.2017.03.058

Milićević BR, Kuzman S, Porobić S, Marinović-Cincović M, Dramićanin M. Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates. in Optical Materials. 2017;74:86-92.
doi:10.1016/j.optmat.2017.03.058 .

Milićević, Bojana R., Kuzman, Sanja, Porobić, Slavica, Marinović-Cincović, Milena, Dramićanin, Miroslav, "Non-isothermal crystallization kinetics of the heavy-group lanthanide dititanates" in Optical Materials, 74 (2017):86-92,
https://doi.org/10.1016/j.optmat.2017.03.058 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Đorđević, Vesna R.
AU  - Lončarević, Davor
AU  - Dostanić, Jasmina
AU  - Ahrenkiel, Scott Phillip
AU  - Dramićanin, Miroslav
AU  - Sredojević, Dušan
AU  - Švrakić, Nenad M.
AU  - Nedeljković, Jovan
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1815
AB  - Under normal conditions, titanium dioxide does not absorb visible light photons due to large band gap. Nevertheless, when titanium dioxide nanoparticles (TiO2 NPs) are surface-modified with thiosalicylic acid (TSA), their optical properties are altered owing to the formation of charge transfer complex that initiates absorption in the visible spectral range. Colloidal and sol-gel techniques were used to synthesize uniform TiO2 NPs of different sizes (average diameters in the range 4-15 nm), and effects of their subsequent modification by TSA molecules were compared with effect of modification of commercial Degussa TiO2 powder. Thorough microstructural characterization of TiO2 nanoparticulates was performed including transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis, as well as nitrogen adsorption-desorption isotherms. Optical measurements revealed that all surface-modified TiO2 samples with TSA have similar spectral features independent of their morphological differences, and, more importantly, absorption onset of modified TiO2 samples was found to be red-shifted by 1.0 eV compared to the unmodified ones. The mode of binding between TSA and surface Ti atoms was analyzed by infrared spectroscopy. Finally, the quantum chemical calculations, based on density functional theory, were performed to support optical characterization of surface-modified TiO2 with TSA. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study
VL  - 73
SP  - 163
EP  - 171
DO  - 10.1016/j.optmat.2017.08.011
ER  - 

@article{
author = "Milićević, Bojana R. and Đorđević, Vesna R. and Lončarević, Davor and Dostanić, Jasmina and Ahrenkiel, Scott Phillip and Dramićanin, Miroslav and Sredojević, Dušan and Švrakić, Nenad M. and Nedeljković, Jovan",
year = "2017",
abstract = "Under normal conditions, titanium dioxide does not absorb visible light photons due to large band gap. Nevertheless, when titanium dioxide nanoparticles (TiO2 NPs) are surface-modified with thiosalicylic acid (TSA), their optical properties are altered owing to the formation of charge transfer complex that initiates absorption in the visible spectral range. Colloidal and sol-gel techniques were used to synthesize uniform TiO2 NPs of different sizes (average diameters in the range 4-15 nm), and effects of their subsequent modification by TSA molecules were compared with effect of modification of commercial Degussa TiO2 powder. Thorough microstructural characterization of TiO2 nanoparticulates was performed including transmission electron microscopy (TEM) and X-ray diffraction (XRD) analysis, as well as nitrogen adsorption-desorption isotherms. Optical measurements revealed that all surface-modified TiO2 samples with TSA have similar spectral features independent of their morphological differences, and, more importantly, absorption onset of modified TiO2 samples was found to be red-shifted by 1.0 eV compared to the unmodified ones. The mode of binding between TSA and surface Ti atoms was analyzed by infrared spectroscopy. Finally, the quantum chemical calculations, based on density functional theory, were performed to support optical characterization of surface-modified TiO2 with TSA. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study",
volume = "73",
pages = "163-171",
doi = "10.1016/j.optmat.2017.08.011"
}

Milićević, B. R., Đorđević, V. R., Lončarević, D., Dostanić, J., Ahrenkiel, S. P., Dramićanin, M., Sredojević, D., Švrakić, N. M.,& Nedeljković, J.. (2017). Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study. in Optical Materials, 73, 163-171.
https://doi.org/10.1016/j.optmat.2017.08.011

Milićević BR, Đorđević VR, Lončarević D, Dostanić J, Ahrenkiel SP, Dramićanin M, Sredojević D, Švrakić NM, Nedeljković J. Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study. in Optical Materials. 2017;73:163-171.
doi:10.1016/j.optmat.2017.08.011 .

Milićević, Bojana R., Đorđević, Vesna R., Lončarević, Davor, Dostanić, Jasmina, Ahrenkiel, Scott Phillip, Dramićanin, Miroslav, Sredojević, Dušan, Švrakić, Nenad M., Nedeljković, Jovan, "Charge-transfer complex formation between TiO2 nanoparticles and thiosalicylic acid: A comprehensive experimental and DFT study" in Optical Materials, 73 (2017):163-171,
https://doi.org/10.1016/j.optmat.2017.08.011 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Đorđević, Vesna R.
AU  - Vuković, Katarina
AU  - Dražić, Goran
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1799
AB  - Sol-gel technique for the synthesis of anatase TiO2 at 420 degrees C produces nanocrystals of 10-20 nm in size with Ti4+ in crystal volume and Ti3+ at terminal planes of the crystal. The study of Li+ co-doping effects on the structure, morphology, absorption, and luminescence of Eu3+ activated TiO2 anatase nanocrystals is presented. Pure anatase structure is achieved up to 9 at.% Li, with significant improvement in crystallinity of europium doped anatase TiO2. The Li+ co-doping reduces the unit cell volume of the crystal, induces the blue shift of the absorption edge, lengthens the lifetime of Eu3+ D-5(0) excited state, and improves the Eu3+ emission intensity up to 37.5%. Judd-Ofelt analysis of Eu3+ emission showed enhancement of quantum efficiency from 66.4% to 98.7% when TiO2:Eu3+ was co-doped with 9 at.% of Li. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles
VL  - 72
SP  - 316
EP  - 322
DO  - 10.1016/j.optmat.2017.06.029
ER  - 

@article{
author = "Milićević, Bojana R. and Đorđević, Vesna R. and Vuković, Katarina and Dražić, Goran and Dramićanin, Miroslav",
year = "2017",
abstract = "Sol-gel technique for the synthesis of anatase TiO2 at 420 degrees C produces nanocrystals of 10-20 nm in size with Ti4+ in crystal volume and Ti3+ at terminal planes of the crystal. The study of Li+ co-doping effects on the structure, morphology, absorption, and luminescence of Eu3+ activated TiO2 anatase nanocrystals is presented. Pure anatase structure is achieved up to 9 at.% Li, with significant improvement in crystallinity of europium doped anatase TiO2. The Li+ co-doping reduces the unit cell volume of the crystal, induces the blue shift of the absorption edge, lengthens the lifetime of Eu3+ D-5(0) excited state, and improves the Eu3+ emission intensity up to 37.5%. Judd-Ofelt analysis of Eu3+ emission showed enhancement of quantum efficiency from 66.4% to 98.7% when TiO2:Eu3+ was co-doped with 9 at.% of Li. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles",
volume = "72",
pages = "316-322",
doi = "10.1016/j.optmat.2017.06.029"
}

Milićević, B. R., Đorđević, V. R., Vuković, K., Dražić, G.,& Dramićanin, M.. (2017). Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles. in Optical Materials, 72, 316-322.
https://doi.org/10.1016/j.optmat.2017.06.029

Milićević BR, Đorđević VR, Vuković K, Dražić G, Dramićanin M. Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles. in Optical Materials. 2017;72:316-322.
doi:10.1016/j.optmat.2017.06.029 .

Milićević, Bojana R., Đorđević, Vesna R., Vuković, Katarina, Dražić, Goran, Dramićanin, Miroslav, "Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles" in Optical Materials, 72 (2017):316-322,
https://doi.org/10.1016/j.optmat.2017.06.029 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Marinović-Cincović, Milena
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1439
AB  - The crystallization kinetics of Y2Ti2O7 powders prepared by a Pechini-type polymerized complex route was studied using differential thermal analysis under non-isothermal conditions. Apparent activation energies of crystallization of 816 and 804 kJ mol(-1) were obtained from calculations based on the Arrhenius equation and isoconversional analysis, respectively. The crystallization kinetics followed the so-called A3 model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda Methods. The measurement results and calculated crystallization parameters (n = 3, m = 2) showed that the crystallization process includes a constant rate of nucleation and two-dimensional growth of nuclei, and excluded the possibility of surface crystallization.
T2  - Powder Technology
T1  - Non-isothermal crystallization kinetics of Y(2)Ti(2)O7
VL  - 310
SP  - 67
EP  - 73
DO  - 10.1016/j.powtec.2017.01.001
ER  - 

@article{
author = "Milićević, Bojana R. and Marinović-Cincović, Milena and Dramićanin, Miroslav",
year = "2017",
abstract = "The crystallization kinetics of Y2Ti2O7 powders prepared by a Pechini-type polymerized complex route was studied using differential thermal analysis under non-isothermal conditions. Apparent activation energies of crystallization of 816 and 804 kJ mol(-1) were obtained from calculations based on the Arrhenius equation and isoconversional analysis, respectively. The crystallization kinetics followed the so-called A3 model, as confirmed using several criteria, namely, the Malek, master plot, and Perez-Maqueda Methods. The measurement results and calculated crystallization parameters (n = 3, m = 2) showed that the crystallization process includes a constant rate of nucleation and two-dimensional growth of nuclei, and excluded the possibility of surface crystallization.",
journal = "Powder Technology",
title = "Non-isothermal crystallization kinetics of Y(2)Ti(2)O7",
volume = "310",
pages = "67-73",
doi = "10.1016/j.powtec.2017.01.001"
}

Milićević, B. R., Marinović-Cincović, M.,& Dramićanin, M.. (2017). Non-isothermal crystallization kinetics of Y(2)Ti(2)O7. in Powder Technology, 310, 67-73.
https://doi.org/10.1016/j.powtec.2017.01.001

Milićević BR, Marinović-Cincović M, Dramićanin M. Non-isothermal crystallization kinetics of Y(2)Ti(2)O7. in Powder Technology. 2017;310:67-73.
doi:10.1016/j.powtec.2017.01.001 .

Milićević, Bojana R., Marinović-Cincović, Milena, Dramićanin, Miroslav, "Non-isothermal crystallization kinetics of Y(2)Ti(2)O7" in Powder Technology, 310 (2017):67-73,
https://doi.org/10.1016/j.powtec.2017.01.001 . .

TY  - JOUR
AU  - Lenhardt, Lea I.
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Tatjana
AU  - Milićević, Bojana R.
AU  - Burojević, Jovana
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1535
AB  - This paper presents parallel factor analysis (PARAFAC) of fluorescence of cereal flours. Excitation emission matrices (EEMs) of different cereal flours (wheat, corn, rye, rice, oat, spelt, barley and buckwheat) were measured in a front-face configuration over the ultraviolet-visible spectral range. EEMs showed that flours strongly fluoresce in two spectral regions, where amino acids, tocopherols, pyridoxine and 4-aminobenzoic acid show intense emissions. 4-component PARAFAC was used to model flour fluorescence and to decompose EEMs into excitation and emission spectra of each component. PARAFAC also provided relative concentrations of these components. The largest differences between flours were found in the concentration levels of the first and third component. Finally, variations in concentrations of PARAFAC modelled components were analysed in relation to the botanical origin of flour samples. (C) 2017 Elsevier Ltd. All rights reserved.
T2  - Food Chemistry
T1  - Characterization of cereal flours by fluorescence spectroscopy coupled with PARAFAC
VL  - 229
SP  - 165
EP  - 171
DO  - 10.1016/j.foodchem.2017.02.070
ER  - 

@article{
author = "Lenhardt, Lea I. and Zeković, Ivana Lj. and Dramićanin, Tatjana and Milićević, Bojana R. and Burojević, Jovana and Dramićanin, Miroslav",
year = "2017",
abstract = "This paper presents parallel factor analysis (PARAFAC) of fluorescence of cereal flours. Excitation emission matrices (EEMs) of different cereal flours (wheat, corn, rye, rice, oat, spelt, barley and buckwheat) were measured in a front-face configuration over the ultraviolet-visible spectral range. EEMs showed that flours strongly fluoresce in two spectral regions, where amino acids, tocopherols, pyridoxine and 4-aminobenzoic acid show intense emissions. 4-component PARAFAC was used to model flour fluorescence and to decompose EEMs into excitation and emission spectra of each component. PARAFAC also provided relative concentrations of these components. The largest differences between flours were found in the concentration levels of the first and third component. Finally, variations in concentrations of PARAFAC modelled components were analysed in relation to the botanical origin of flour samples. (C) 2017 Elsevier Ltd. All rights reserved.",
journal = "Food Chemistry",
title = "Characterization of cereal flours by fluorescence spectroscopy coupled with PARAFAC",
volume = "229",
pages = "165-171",
doi = "10.1016/j.foodchem.2017.02.070"
}

Lenhardt, L. I., Zeković, I. Lj., Dramićanin, T., Milićević, B. R., Burojević, J.,& Dramićanin, M.. (2017). Characterization of cereal flours by fluorescence spectroscopy coupled with PARAFAC. in Food Chemistry, 229, 165-171.
https://doi.org/10.1016/j.foodchem.2017.02.070

Lenhardt LI, Zeković IL, Dramićanin T, Milićević BR, Burojević J, Dramićanin M. Characterization of cereal flours by fluorescence spectroscopy coupled with PARAFAC. in Food Chemistry. 2017;229:165-171.
doi:10.1016/j.foodchem.2017.02.070 .

Lenhardt, Lea I., Zeković, Ivana Lj., Dramićanin, Tatjana, Milićević, Bojana R., Burojević, Jovana, Dramićanin, Miroslav, "Characterization of cereal flours by fluorescence spectroscopy coupled with PARAFAC" in Food Chemistry, 229 (2017):165-171,
https://doi.org/10.1016/j.foodchem.2017.02.070 . .

TY  - THES
AU  - Milićević, Bojana R.
PY  - 2017
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5384
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:16741/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=49501199
UR  - http://nardus.mpn.gov.rs/123456789/8915
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7327
AB  - U ovoj doktorskoj disertaciji prikazana je temeljna studija modifikovanja strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja: prazeodijuma, neodijuma, samarijuma, europijuma, disprozijuma, terbijuma, holmijuma, erbijuma i tulijuma, pri koncentraciji od 1 at.%. Pomenuti materijali sintetisani su sol-gel tehnikom i žareni na temperaturi od 420 ºC. Strukturna svojstva nedopiranog anatas TiO2 kao i TiO2 dopiranоg jonima retkih zemalja ispitivana su rendgenskom difrakcionom analizom. Utvrđeno je da se sol-gel sintezom dobijaju čiste anatasne kristalne strukture sa veličinom kristalita od svega nekoliko nanometara. Uticaj jona retkih zemalja u anatasnoj kristalnoj strukturi titan-dioksida ogleda se u značajnom porastu specifične površine čestica. Takođe, sintetisani su nanoprahovi TiO2 koloidnom tehnikom u cilju korelisanja različitih metoda sinteza sa strukturnim, morfološkim i optičkim svojstvima...
AB  - The primary aim of this thesis is to explain the modification of structure, morphology and optical properties of anatase TiO2 nanoparticles doped with trivalent rare-earth ions: praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, and thulium, with the concentration of 1 at.%. These materials were synthesized by the sol-gel technique and further annealed at 420 °C. Structural properties of anatase TiO2 and TiO2 doped with trivalent rare-earth ions are studied by X-ray diffraction analysis. It was confirmed that pure anatase TiO2 with the crystallite size of only a few nanometers was obtained by sol-gel synthesis. The incorporation of rare earth ions in the anatase TiO2 is reflected in the significant increase of the specific surface area of TiO2 nanopowders doped with rare-earth ions in comparison with undoped TiO2. Also, the TiO2 nanopowders were synthesized by a colloid technique to correlate the different methods of synthesis with structural, morphological and optical properties...
PB  - Универзитет у Београду, Факултет за физичку хемију
T2  - Универзитет у Београду
T1  - Modifikacija strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja
UR  - https://hdl.handle.net/21.15107/rcub_nardus_8915
ER  - 

@phdthesis{
author = "Milićević, Bojana R.",
year = "2017",
abstract = "U ovoj doktorskoj disertaciji prikazana je temeljna studija modifikovanja strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja: prazeodijuma, neodijuma, samarijuma, europijuma, disprozijuma, terbijuma, holmijuma, erbijuma i tulijuma, pri koncentraciji od 1 at.%. Pomenuti materijali sintetisani su sol-gel tehnikom i žareni na temperaturi od 420 ºC. Strukturna svojstva nedopiranog anatas TiO2 kao i TiO2 dopiranоg jonima retkih zemalja ispitivana su rendgenskom difrakcionom analizom. Utvrđeno je da se sol-gel sintezom dobijaju čiste anatasne kristalne strukture sa veličinom kristalita od svega nekoliko nanometara. Uticaj jona retkih zemalja u anatasnoj kristalnoj strukturi titan-dioksida ogleda se u značajnom porastu specifične površine čestica. Takođe, sintetisani su nanoprahovi TiO2 koloidnom tehnikom u cilju korelisanja različitih metoda sinteza sa strukturnim, morfološkim i optičkim svojstvima..., The primary aim of this thesis is to explain the modification of structure, morphology and optical properties of anatase TiO2 nanoparticles doped with trivalent rare-earth ions: praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, and thulium, with the concentration of 1 at.%. These materials were synthesized by the sol-gel technique and further annealed at 420 °C. Structural properties of anatase TiO2 and TiO2 doped with trivalent rare-earth ions are studied by X-ray diffraction analysis. It was confirmed that pure anatase TiO2 with the crystallite size of only a few nanometers was obtained by sol-gel synthesis. The incorporation of rare earth ions in the anatase TiO2 is reflected in the significant increase of the specific surface area of TiO2 nanopowders doped with rare-earth ions in comparison with undoped TiO2. Also, the TiO2 nanopowders were synthesized by a colloid technique to correlate the different methods of synthesis with structural, morphological and optical properties...",
publisher = "Универзитет у Београду, Факултет за физичку хемију",
journal = "Универзитет у Београду",
title = "Modifikacija strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja",
url = "https://hdl.handle.net/21.15107/rcub_nardus_8915"
}

Milićević, B. R.. (2017). Modifikacija strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja. in Универзитет у Београду
Универзитет у Београду, Факултет за физичку хемију..
https://hdl.handle.net/21.15107/rcub_nardus_8915

Milićević BR. Modifikacija strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja. in Универзитет у Београду. 2017;.
https://hdl.handle.net/21.15107/rcub_nardus_8915 .

Milićević, Bojana R., "Modifikacija strukturnih, morfoloških i optičkih svojstava anatas TiO2 nanočestica dopiranjem trovalentnim jonima retkih zemalja" in Универзитет у Београду (2017),
https://hdl.handle.net/21.15107/rcub_nardus_8915 .

TY  - JOUR
AU  - Antonov, Milica
AU  - Lenhardt, Lea I.
AU  - Manojlović, Dragica
AU  - Milićević, Bojana R.
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Miroslav
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1281
AB  - ObjectiveThe aim of this study was to evaluate changes of color and fluorescence of resin based composite exposed to beer. Materials and Methods84 samples (13 mm in diameter and 1.5 mm thick) of microhybrid composite Gradia Direct(TM) extra bleach white were immersed in 5 different beers (dark and light) or distilled water. Color and fluorescence were measured prior and after 1-, 7-, and 14-day immersion by Spectrophotometer Thermo Evolution 600 and Fluorolog-3-221 spectrofluorometer. ResultsResin based composites changed color after immersion in beers of different types. Beers with higher optical absorption induced greater color changes. The fluorescence intensity of composites was decreased after immersion in beer, but the shape of fluorescence spectra was not changed. 14-day immersion in Bernard dark beer caused the greatest changes in optical properties of composite: E*=9.0 and 57.6% reduced fluorescence. ConclusionDark and light beers changed optical properties of resin based composite. The color change come exclusively from the change of chroma. Clinical SignificanceTo fully meet esthetic criteria when using dental materials in restoration it is crucial to match optical properties of teeth and dental restoration at the moment of placement, but also to keep the match over the time. Considering that staining in beer causes changes in color and fluorescence of composites and that discoloration is a frequent reason for replacement of composite restorations, the data and conclusions on discoloration of dental restorations caused by beer consumption should aid dental professionals when reaching for high esthetics of modern dentistry.(J Esthet Restor Dent 28:330-338, 2016)
T2  - Journal of Esthetic and Restorative Dentistry
T1  - Changes of Color and Fluorescence of Resin Composites Immersed in Beer
VL  - 28
IS  - 5
SP  - 330
EP  - 338
DO  - 10.1111/jerd.12232
ER  - 

@article{
author = "Antonov, Milica and Lenhardt, Lea I. and Manojlović, Dragica and Milićević, Bojana R. and Zeković, Ivana Lj. and Dramićanin, Miroslav",
year = "2016",
abstract = "ObjectiveThe aim of this study was to evaluate changes of color and fluorescence of resin based composite exposed to beer. Materials and Methods84 samples (13 mm in diameter and 1.5 mm thick) of microhybrid composite Gradia Direct(TM) extra bleach white were immersed in 5 different beers (dark and light) or distilled water. Color and fluorescence were measured prior and after 1-, 7-, and 14-day immersion by Spectrophotometer Thermo Evolution 600 and Fluorolog-3-221 spectrofluorometer. ResultsResin based composites changed color after immersion in beers of different types. Beers with higher optical absorption induced greater color changes. The fluorescence intensity of composites was decreased after immersion in beer, but the shape of fluorescence spectra was not changed. 14-day immersion in Bernard dark beer caused the greatest changes in optical properties of composite: E*=9.0 and 57.6% reduced fluorescence. ConclusionDark and light beers changed optical properties of resin based composite. The color change come exclusively from the change of chroma. Clinical SignificanceTo fully meet esthetic criteria when using dental materials in restoration it is crucial to match optical properties of teeth and dental restoration at the moment of placement, but also to keep the match over the time. Considering that staining in beer causes changes in color and fluorescence of composites and that discoloration is a frequent reason for replacement of composite restorations, the data and conclusions on discoloration of dental restorations caused by beer consumption should aid dental professionals when reaching for high esthetics of modern dentistry.(J Esthet Restor Dent 28:330-338, 2016)",
journal = "Journal of Esthetic and Restorative Dentistry",
title = "Changes of Color and Fluorescence of Resin Composites Immersed in Beer",
volume = "28",
number = "5",
pages = "330-338",
doi = "10.1111/jerd.12232"
}

Antonov, M., Lenhardt, L. I., Manojlović, D., Milićević, B. R., Zeković, I. Lj.,& Dramićanin, M.. (2016). Changes of Color and Fluorescence of Resin Composites Immersed in Beer. in Journal of Esthetic and Restorative Dentistry, 28(5), 330-338.
https://doi.org/10.1111/jerd.12232

Antonov M, Lenhardt LI, Manojlović D, Milićević BR, Zeković IL, Dramićanin M. Changes of Color and Fluorescence of Resin Composites Immersed in Beer. in Journal of Esthetic and Restorative Dentistry. 2016;28(5):330-338.
doi:10.1111/jerd.12232 .

Antonov, Milica, Lenhardt, Lea I., Manojlović, Dragica, Milićević, Bojana R., Zeković, Ivana Lj., Dramićanin, Miroslav, "Changes of Color and Fluorescence of Resin Composites Immersed in Beer" in Journal of Esthetic and Restorative Dentistry, 28, no. 5 (2016):330-338,
https://doi.org/10.1111/jerd.12232 . .

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Đorđević, Vesna R.
AU  - Lončarević, Davor
AU  - Ahrenkiel, Scott Phillip
AU  - Dramićanin, Miroslav
AU  - Nedeljković, Jovan
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/719
AB  - TiO2 powders with different specific surface area were prepared using reproducible, sol gel synthetic route and their ability to form hybrids with catechol and 5-amino salicylic acid was compared with the commercially available Degussa P25 TiO2 powder. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that TiO2 samples cover reasonably wide size and/or specific surface area range (50-115 m(2)/g). The surface modification of TiO2 powders with catechol and 5-amino salicylic acid induced significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of TiO2 in powder form have never been reported in the literature. The largest red shift of the absorption onset was observed for sample with the largest specific surface area upon surface modification with both ligands. The binding of the modifier molecules to the surface Ti atoms was studied using Fourier transform infrared spectroscopy. (C) 2015 Elsevier Inc. All rights reserved.
T2  - Microporous and Mesoporous Materials
T1  - Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives
VL  - 217
SP  - 184
EP  - 189
DO  - 10.1016/j.micromeso.2015.06.028
ER  - 

@article{
author = "Milićević, Bojana R. and Đorđević, Vesna R. and Lončarević, Davor and Ahrenkiel, Scott Phillip and Dramićanin, Miroslav and Nedeljković, Jovan",
year = "2015",
abstract = "TiO2 powders with different specific surface area were prepared using reproducible, sol gel synthetic route and their ability to form hybrids with catechol and 5-amino salicylic acid was compared with the commercially available Degussa P25 TiO2 powder. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that TiO2 samples cover reasonably wide size and/or specific surface area range (50-115 m(2)/g). The surface modification of TiO2 powders with catechol and 5-amino salicylic acid induced significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of TiO2 in powder form have never been reported in the literature. The largest red shift of the absorption onset was observed for sample with the largest specific surface area upon surface modification with both ligands. The binding of the modifier molecules to the surface Ti atoms was studied using Fourier transform infrared spectroscopy. (C) 2015 Elsevier Inc. All rights reserved.",
journal = "Microporous and Mesoporous Materials",
title = "Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives",
volume = "217",
pages = "184-189",
doi = "10.1016/j.micromeso.2015.06.028"
}

Milićević, B. R., Đorđević, V. R., Lončarević, D., Ahrenkiel, S. P., Dramićanin, M.,& Nedeljković, J.. (2015). Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives. in Microporous and Mesoporous Materials, 217, 184-189.
https://doi.org/10.1016/j.micromeso.2015.06.028

Milićević BR, Đorđević VR, Lončarević D, Ahrenkiel SP, Dramićanin M, Nedeljković J. Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives. in Microporous and Mesoporous Materials. 2015;217:184-189.
doi:10.1016/j.micromeso.2015.06.028 .

Milićević, Bojana R., Đorđević, Vesna R., Lončarević, Davor, Ahrenkiel, Scott Phillip, Dramićanin, Miroslav, Nedeljković, Jovan, "Visible light absorption of surface modified TiO2 powders with bidentate benzene derivatives" in Microporous and Mesoporous Materials, 217 (2015):184-189,
https://doi.org/10.1016/j.micromeso.2015.06.028 . .

TY  - JOUR
AU  - Manojlović, Dragan D.
AU  - Lenhardt, Lea I.
AU  - Milićević, Bojana R.
AU  - Antonov, Milica
AU  - Miletic, V.
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/763
AB  - Colour changes in Gradia Direct (TM) composite after immersion in tea, coffee, red wine, Coca-Cola, Colgate mouthwash, and distilled water were evaluated using principal component analysis (PCA) and the CIELAB colour coordinates. The reflection spectra of the composites were used as input data for the PCA. The output data (scores and loadings) provided information about the magnitude and origin of the surface reflection changes after exposure to the staining solutions. The reflection spectra of the stained samples generally exhibited lower reflection in the blue spectral range, which was manifested in the lower content of the blue shade for the samples. Both analyses demonstrated the high staining abilities of tea, coffee, and red wine, which produced total colour changes of 4.31, 6.61, and 6.22, respectively, according to the CIELAB analysis. PCA revealed subtle changes in the reflection spectra of composites immersed in Coca-Cola, demonstrating Coca-Colas ability to stain the composite to a small degree.
T2  - Scientific Reports
T1  - Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis
VL  - 5
DO  - 10.1038/srep14638
ER  - 

@article{
author = "Manojlović, Dragan D. and Lenhardt, Lea I. and Milićević, Bojana R. and Antonov, Milica and Miletic, V. and Dramićanin, Miroslav",
year = "2015",
abstract = "Colour changes in Gradia Direct (TM) composite after immersion in tea, coffee, red wine, Coca-Cola, Colgate mouthwash, and distilled water were evaluated using principal component analysis (PCA) and the CIELAB colour coordinates. The reflection spectra of the composites were used as input data for the PCA. The output data (scores and loadings) provided information about the magnitude and origin of the surface reflection changes after exposure to the staining solutions. The reflection spectra of the stained samples generally exhibited lower reflection in the blue spectral range, which was manifested in the lower content of the blue shade for the samples. Both analyses demonstrated the high staining abilities of tea, coffee, and red wine, which produced total colour changes of 4.31, 6.61, and 6.22, respectively, according to the CIELAB analysis. PCA revealed subtle changes in the reflection spectra of composites immersed in Coca-Cola, demonstrating Coca-Colas ability to stain the composite to a small degree.",
journal = "Scientific Reports",
title = "Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis",
volume = "5",
doi = "10.1038/srep14638"
}

Manojlović, D. D., Lenhardt, L. I., Milićević, B. R., Antonov, M., Miletic, V.,& Dramićanin, M.. (2015). Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis. in Scientific Reports, 5.
https://doi.org/10.1038/srep14638

Manojlović DD, Lenhardt LI, Milićević BR, Antonov M, Miletic V, Dramićanin M. Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis. in Scientific Reports. 2015;5.
doi:10.1038/srep14638 .

Manojlović, Dragan D., Lenhardt, Lea I., Milićević, Bojana R., Antonov, Milica, Miletic, V., Dramićanin, Miroslav, "Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis" in Scientific Reports, 5 (2015),
https://doi.org/10.1038/srep14638 . .