TY  - JOUR
AU  - Đačanin Far, Ljubica
AU  - Zeković, Ivana
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Alodhayb, Abdullah
AU  - Dramićanin, Miroslav
AU  - Antić, Željka
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11339
AB  - Luminescent Eu3+-doped SrF2 nanoparticles were synthesized using microwave-assisted synthesis. Their surfaces were modified either by polyethylene glycol or mercaptopropionic acid to enhance their dispersibility in aqueous media and colloidal formation. X-ray diffraction analysis confirmed single-phase cubic structure in both types of hydrophilic-modified Sr0.9Eu0.1F2 luminescent powders. The average crystallite size of nanoparticles is found to be ∼13 nm. Scanning electron microscopy of the representative PEG2000-modified sample revealed that particles form agglomerates composed of densely packed nanoparticles. The microstructure at a local level was investigated by transmission electron microscopy showing the presence of sphere-like nanoparticles with an average particle size of 12.5 nm and 14 nm for PEG-modified and MPA-modified Sr0.9Eu0.1F2, respectively. Both PEG2000 and MPA-modified Sr0.9Eu0.1F2 water dispersions show strong red Eu3+ emission under 405 nm excitation that is quenched in the presence of the primary NP fertilizer, ammonium dihydrogen phosphate, NH4H2PO4. The limit of detection was calculated to be ∼19 mM for both hydrophilic-modified Sr0.9Eu0.1F2 luminescent nanoparticles.
T2  - Optical Materials
T1  - Luminescent Eu3+ doped SrF2 nanoparticles for fluorescent detection of fertilizers
VL  - 142
SP  - 114061
DO  - 10.1016/j.optmat.2023.114061
ER  - 

@article{
author = "Đačanin Far, Ljubica and Zeković, Ivana and Periša, Jovana and Ristić, Zoran and Alodhayb, Abdullah and Dramićanin, Miroslav and Antić, Željka",
year = "2023",
abstract = "Luminescent Eu3+-doped SrF2 nanoparticles were synthesized using microwave-assisted synthesis. Their surfaces were modified either by polyethylene glycol or mercaptopropionic acid to enhance their dispersibility in aqueous media and colloidal formation. X-ray diffraction analysis confirmed single-phase cubic structure in both types of hydrophilic-modified Sr0.9Eu0.1F2 luminescent powders. The average crystallite size of nanoparticles is found to be ∼13 nm. Scanning electron microscopy of the representative PEG2000-modified sample revealed that particles form agglomerates composed of densely packed nanoparticles. The microstructure at a local level was investigated by transmission electron microscopy showing the presence of sphere-like nanoparticles with an average particle size of 12.5 nm and 14 nm for PEG-modified and MPA-modified Sr0.9Eu0.1F2, respectively. Both PEG2000 and MPA-modified Sr0.9Eu0.1F2 water dispersions show strong red Eu3+ emission under 405 nm excitation that is quenched in the presence of the primary NP fertilizer, ammonium dihydrogen phosphate, NH4H2PO4. The limit of detection was calculated to be ∼19 mM for both hydrophilic-modified Sr0.9Eu0.1F2 luminescent nanoparticles.",
journal = "Optical Materials",
title = "Luminescent Eu3+ doped SrF2 nanoparticles for fluorescent detection of fertilizers",
volume = "142",
pages = "114061",
doi = "10.1016/j.optmat.2023.114061"
}

Đačanin Far, L., Zeković, I., Periša, J., Ristić, Z., Alodhayb, A., Dramićanin, M.,& Antić, Ž.. (2023). Luminescent Eu3+ doped SrF2 nanoparticles for fluorescent detection of fertilizers. in Optical Materials, 142, 114061.
https://doi.org/10.1016/j.optmat.2023.114061

Đačanin Far L, Zeković I, Periša J, Ristić Z, Alodhayb A, Dramićanin M, Antić Ž. Luminescent Eu3+ doped SrF2 nanoparticles for fluorescent detection of fertilizers. in Optical Materials. 2023;142:114061.
doi:10.1016/j.optmat.2023.114061 .

Đačanin Far, Ljubica, Zeković, Ivana, Periša, Jovana, Ristić, Zoran, Alodhayb, Abdullah, Dramićanin, Miroslav, Antić, Željka, "Luminescent Eu3+ doped SrF2 nanoparticles for fluorescent detection of fertilizers" in Optical Materials, 142 (2023):114061,
https://doi.org/10.1016/j.optmat.2023.114061 . .

TY  - JOUR
AU  - Mullins, Abbi L.
AU  - Ćirić, Aleksandar
AU  - Zeković, Ivana Lj.
AU  - Williams, J. A. Gareth
AU  - Dramićanin, Miroslav
AU  - Radosavjević Evans, Ivana
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10362
AB  - A series of La1−xGa0.99O3:Cr0.01, Ndx phosphors (where x = 0.005, 0.01, 0.02) for luminescence thermometry was synthesised by the solid-state method, structurally characterised using powder X-ray diffraction data, and investigated by ambient and variable-temperature optical measurements. The design principle relies on the use of a combination of transition metal and rare earth activator ions such that the excitation and emission wavelengths fall within the near infra-red spectral region, notably in the ‘first biological window’ that is attractive for potential in vivo applications. The photoluminescence spectra of the compounds feature the characteristic 2E phosphorescence of Cr3+ at 729 nm and the 4F3/2 → 4I9/2 emission of Nd3+ around 890 nm. The Nd3+ emission is quenched at a higher rate than that of Cr3+ with increasing temperature. Thermometric analysis by monitoring the luminescence intensity ratio (LIR) between the emissions of Cr3+ and Nd3+ from 300 K to 650 K shows a quasi-Boltzmann trend, with a maximum relative sensitivity of ∼2% K−1, high absolute sensitivity values over this entire temperature range, excellent temperature resolution of 0.04 K at room temperature, and high stability.
T2  - Journal of Materials Chemistry C
T1  - Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors
VL  - 10
IS  - 28
SP  - 10396
EP  - 10403
DO  - 10.1039/D2TC02011D
ER  - 

@article{
author = "Mullins, Abbi L. and Ćirić, Aleksandar and Zeković, Ivana Lj. and Williams, J. A. Gareth and Dramićanin, Miroslav and Radosavjević Evans, Ivana",
year = "2022",
abstract = "A series of La1−xGa0.99O3:Cr0.01, Ndx phosphors (where x = 0.005, 0.01, 0.02) for luminescence thermometry was synthesised by the solid-state method, structurally characterised using powder X-ray diffraction data, and investigated by ambient and variable-temperature optical measurements. The design principle relies on the use of a combination of transition metal and rare earth activator ions such that the excitation and emission wavelengths fall within the near infra-red spectral region, notably in the ‘first biological window’ that is attractive for potential in vivo applications. The photoluminescence spectra of the compounds feature the characteristic 2E phosphorescence of Cr3+ at 729 nm and the 4F3/2 → 4I9/2 emission of Nd3+ around 890 nm. The Nd3+ emission is quenched at a higher rate than that of Cr3+ with increasing temperature. Thermometric analysis by monitoring the luminescence intensity ratio (LIR) between the emissions of Cr3+ and Nd3+ from 300 K to 650 K shows a quasi-Boltzmann trend, with a maximum relative sensitivity of ∼2% K−1, high absolute sensitivity values over this entire temperature range, excellent temperature resolution of 0.04 K at room temperature, and high stability.",
journal = "Journal of Materials Chemistry C",
title = "Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors",
volume = "10",
number = "28",
pages = "10396-10403",
doi = "10.1039/D2TC02011D"
}

Mullins, A. L., Ćirić, A., Zeković, I. Lj., Williams, J. A. G., Dramićanin, M.,& Radosavjević Evans, I.. (2022). Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors. in Journal of Materials Chemistry C, 10(28), 10396-10403.
https://doi.org/10.1039/D2TC02011D

Mullins AL, Ćirić A, Zeković IL, Williams JAG, Dramićanin M, Radosavjević Evans I. Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors. in Journal of Materials Chemistry C. 2022;10(28):10396-10403.
doi:10.1039/D2TC02011D .

Mullins, Abbi L., Ćirić, Aleksandar, Zeković, Ivana Lj., Williams, J. A. Gareth, Dramićanin, Miroslav, Radosavjević Evans, Ivana, "Dual-emission luminescence thermometry using LaGaO3:Cr3+, Nd3+ phosphors" in Journal of Materials Chemistry C, 10, no. 28 (2022):10396-10403,
https://doi.org/10.1039/D2TC02011D . .

TY  - JOUR
AU  - Periša, Jovana
AU  - Ćirić, Aleksandar
AU  - Zeković, Ivana
AU  - Đorđević, Vesna
AU  - Sekulić, Milica
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10481
AB  - The sensitivity of luminescence thermometry is enhanced at high temperatures when using a three-level luminescence intensity ratio approach with Dy3+- activated yttrium aluminum perovskite. This material was synthesized via the Pechini method, and the structure was verified using X-ray diffraction analysis. The average crystallite size was calculated to be around 46 nm. The morphology was examined using scanning electron microscopy, which showed agglomerates composed of densely packed, elongated spherical particles, the majority of which were 80–100 nm in size. The temperature-dependent photoluminescence emission spectra (ex = 353 nm, 300–850 K) included Dy3+ emissions in blue (458 nm), blue (483 nm), and violet (430 nm, T 600 K). Luminescence intensity ratio, the most utilized temperature readout method in luminescent thermometry, was used as the testing method: a) using the intensity ratio of Dy3+ ions and 4I15/2→6H15/2/4F9/2→6H15/2 transitions; and b) employing the third, higher energy 4G11/2 thermalized level, i.e., using the intensity ratio of 4G11/2→6H15/2/4F9/2→6H15/2 transitions, thereby showing the relative sensitivities of 0.41% K−1 and 0.86% K−1 at 600 K, respectively. This more than doubles the increase in sensitivity and therefore demonstrates the method’s usability at high temperatures, although the major limitation of the method is the chemical stability of the host material and the temperature at which the temperature quenching commences. Lastly, it must be noted that at 850 K, the emission intensities from the energetically higher levels were still increasing in YAP: Dy3+.
T2  - Sensors
T1  - Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry
VL  - 22
IS  - 20
SP  - 7997
DO  - 10.3390/s22207997
ER  - 

@article{
author = "Periša, Jovana and Ćirić, Aleksandar and Zeković, Ivana and Đorđević, Vesna and Sekulić, Milica and Antić, Željka and Dramićanin, Miroslav",
year = "2022",
abstract = "The sensitivity of luminescence thermometry is enhanced at high temperatures when using a three-level luminescence intensity ratio approach with Dy3+- activated yttrium aluminum perovskite. This material was synthesized via the Pechini method, and the structure was verified using X-ray diffraction analysis. The average crystallite size was calculated to be around 46 nm. The morphology was examined using scanning electron microscopy, which showed agglomerates composed of densely packed, elongated spherical particles, the majority of which were 80–100 nm in size. The temperature-dependent photoluminescence emission spectra (ex = 353 nm, 300–850 K) included Dy3+ emissions in blue (458 nm), blue (483 nm), and violet (430 nm, T 600 K). Luminescence intensity ratio, the most utilized temperature readout method in luminescent thermometry, was used as the testing method: a) using the intensity ratio of Dy3+ ions and 4I15/2→6H15/2/4F9/2→6H15/2 transitions; and b) employing the third, higher energy 4G11/2 thermalized level, i.e., using the intensity ratio of 4G11/2→6H15/2/4F9/2→6H15/2 transitions, thereby showing the relative sensitivities of 0.41% K−1 and 0.86% K−1 at 600 K, respectively. This more than doubles the increase in sensitivity and therefore demonstrates the method’s usability at high temperatures, although the major limitation of the method is the chemical stability of the host material and the temperature at which the temperature quenching commences. Lastly, it must be noted that at 850 K, the emission intensities from the energetically higher levels were still increasing in YAP: Dy3+.",
journal = "Sensors",
title = "Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry",
volume = "22",
number = "20",
pages = "7997",
doi = "10.3390/s22207997"
}

Periša, J., Ćirić, A., Zeković, I., Đorđević, V., Sekulić, M., Antić, Ž.,& Dramićanin, M.. (2022). Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry. in Sensors, 22(20), 7997.
https://doi.org/10.3390/s22207997

Periša J, Ćirić A, Zeković I, Đorđević V, Sekulić M, Antić Ž, Dramićanin M. Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry. in Sensors. 2022;22(20):7997.
doi:10.3390/s22207997 .

Periša, Jovana, Ćirić, Aleksandar, Zeković, Ivana, Đorđević, Vesna, Sekulić, Milica, Antić, Željka, Dramićanin, Miroslav, "Exploiting High-Energy Emissions of YAlO3:Dy3+ for Sensitivity Improvement of Ratiometric Luminescence Thermometry" in Sensors, 22, no. 20 (2022):7997,
https://doi.org/10.3390/s22207997 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Periša, Jovana
AU  - Zeković, Ivana Lj.
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10172
AB  - We report on overcoming the sensitivity limit of Boltzmann's thermometers by utilization of seven thermalized Dy3+ excited states in the Lu1.5Y1·5Al5O12 host. Emission spectra recorded from room temperature to 938 K show transitions originating from seven 4F9/2, 4I15/2, 4G11/2, 4I13/2, 4M21/2, 4K17/2, and 4F7/2 excited levels to the 6H15/2 ground state. We introduce the multi-cascade LIR (McLIR) by extending the conventional, two-thermalized level Boltzmann-type LIR to seven thermalized levels. This approach provides higher energy differences between thermalized levels which results in five times larger sensitivity than in the conventional LIR. Considering energy differences between Dy3+ excited states of 1043, 2464, 4331, and 5089 cm−1, the luminescence thermometry with McLIR provided 0.35, 0.84, 1.47, 1.73% K−1 relative sensitivities at 650 K, respectively, in four different LIR combinations. The validity of the McLIR method and the effectiveness of thermalizations between levels is confirmed with the good theoretical fit of experimental data.
T2  - Journal of Luminescence
T1  - Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers
VL  - 245
SP  - 118795
DO  - 10.1016/j.jlumin.2022.118795
ER  - 

@article{
author = "Ćirić, Aleksandar and Periša, Jovana and Zeković, Ivana Lj. and Antić, Željka and Dramićanin, Miroslav",
year = "2022",
abstract = "We report on overcoming the sensitivity limit of Boltzmann's thermometers by utilization of seven thermalized Dy3+ excited states in the Lu1.5Y1·5Al5O12 host. Emission spectra recorded from room temperature to 938 K show transitions originating from seven 4F9/2, 4I15/2, 4G11/2, 4I13/2, 4M21/2, 4K17/2, and 4F7/2 excited levels to the 6H15/2 ground state. We introduce the multi-cascade LIR (McLIR) by extending the conventional, two-thermalized level Boltzmann-type LIR to seven thermalized levels. This approach provides higher energy differences between thermalized levels which results in five times larger sensitivity than in the conventional LIR. Considering energy differences between Dy3+ excited states of 1043, 2464, 4331, and 5089 cm−1, the luminescence thermometry with McLIR provided 0.35, 0.84, 1.47, 1.73% K−1 relative sensitivities at 650 K, respectively, in four different LIR combinations. The validity of the McLIR method and the effectiveness of thermalizations between levels is confirmed with the good theoretical fit of experimental data.",
journal = "Journal of Luminescence",
title = "Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers",
volume = "245",
pages = "118795",
doi = "10.1016/j.jlumin.2022.118795"
}

Ćirić, A., Periša, J., Zeković, I. Lj., Antić, Ž.,& Dramićanin, M.. (2022). Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers. in Journal of Luminescence, 245, 118795.
https://doi.org/10.1016/j.jlumin.2022.118795

Ćirić A, Periša J, Zeković IL, Antić Ž, Dramićanin M. Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers. in Journal of Luminescence. 2022;245:118795.
doi:10.1016/j.jlumin.2022.118795 .

Ćirić, Aleksandar, Periša, Jovana, Zeković, Ivana Lj., Antić, Željka, Dramićanin, Miroslav, "Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers" in Journal of Luminescence, 245 (2022):118795,
https://doi.org/10.1016/j.jlumin.2022.118795 . .

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Stojadinović, Stevan
AU  - Ristić, Zoran
AU  - Zeković, Ivana Lj.
AU  - Kuzman, Sanja
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9140
AB  - The introduction of additional functionalities to materials is exceptionally important as it opens new applications for them. Aluminum, one of the most abundant and important materials, is coated with luminescent Sm2+-doped γ-aluminium oxide to impart thermometric functionality. Considering the potential industrial applications, two of the most widely used aluminum alloys, 6061 and 7075, are also coated. For this purpose, plasma electrolytic oxidation (PEO), an effective technique for producing hard ceramic coatings on various metal surfaces, is used. It is shown that thermometric coatings can be produced on aluminum in one-step process by adding the raw precursor to the electrolyte. The valence reduction of Ln3+ to Ln2+ is achieved during the PEO process. The intense and broad (orange to deep red) emission from the coating shows supersensitivity to temperature changes over the 100–648 K range. The temperature is obtained from the coating emission using i) the emission intensity ratio method, ii) emission lifetime, and iii) emission band position with sensitivities of 4.8% K−1, 1.2% K−1, and 8 cm−1 K−1, respectively. Several applications would benefit from the thermometric coating's excellent temperature resolution of 0.04 K and the choice of three temperature read-outs that facilitate the coating's use in different luminescence thermometry setups. © 2021 Wiley-VCH GmbH
T2  - Advanced Materials Technologies
T1  - Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence
VL  - 6
IS  - 4
SP  - 2001201
DO  - 10.1002/admt.202001201
ER  - 

@article{
author = "Ćirić, Aleksandar and Stojadinović, Stevan and Ristić, Zoran and Zeković, Ivana Lj. and Kuzman, Sanja and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "The introduction of additional functionalities to materials is exceptionally important as it opens new applications for them. Aluminum, one of the most abundant and important materials, is coated with luminescent Sm2+-doped γ-aluminium oxide to impart thermometric functionality. Considering the potential industrial applications, two of the most widely used aluminum alloys, 6061 and 7075, are also coated. For this purpose, plasma electrolytic oxidation (PEO), an effective technique for producing hard ceramic coatings on various metal surfaces, is used. It is shown that thermometric coatings can be produced on aluminum in one-step process by adding the raw precursor to the electrolyte. The valence reduction of Ln3+ to Ln2+ is achieved during the PEO process. The intense and broad (orange to deep red) emission from the coating shows supersensitivity to temperature changes over the 100–648 K range. The temperature is obtained from the coating emission using i) the emission intensity ratio method, ii) emission lifetime, and iii) emission band position with sensitivities of 4.8% K−1, 1.2% K−1, and 8 cm−1 K−1, respectively. Several applications would benefit from the thermometric coating's excellent temperature resolution of 0.04 K and the choice of three temperature read-outs that facilitate the coating's use in different luminescence thermometry setups. © 2021 Wiley-VCH GmbH",
journal = "Advanced Materials Technologies",
title = "Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence",
volume = "6",
number = "4",
pages = "2001201",
doi = "10.1002/admt.202001201"
}

Ćirić, A., Stojadinović, S., Ristić, Z., Zeković, I. Lj., Kuzman, S., Antić, Ž.,& Dramićanin, M.. (2021). Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence. in Advanced Materials Technologies, 6(4), 2001201.
https://doi.org/10.1002/admt.202001201

Ćirić A, Stojadinović S, Ristić Z, Zeković IL, Kuzman S, Antić Ž, Dramićanin M. Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence. in Advanced Materials Technologies. 2021;6(4):2001201.
doi:10.1002/admt.202001201 .

Ćirić, Aleksandar, Stojadinović, Stevan, Ristić, Zoran, Zeković, Ivana Lj., Kuzman, Sanja, Antić, Željka, Dramićanin, Miroslav, "Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence" in Advanced Materials Technologies, 6, no. 4 (2021):2001201,
https://doi.org/10.1002/admt.202001201 . .

TY  - CONF
AU  - Đorđević, Vesna
AU  - Ristić, Zoran
AU  - Periša, Jovana
AU  - Zeković, Ivana
AU  - Ćirić, Aleksandar
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11986
PB  - Belgrade : University of Belgrade, "Vinča" Institute of Nuclear Sciences
C3  - 1st Edition of the International Conference on the Physics of Optical Materials and Devices – Asia (ICOM-Asia 2020) : Book of Abstracts
T1  - Triple Ratiometric Temperature Read-Out in Luminescence Thermometry With YAG:Dy,Cr
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11986
ER  - 

@conference{
author = "Đorđević, Vesna and Ristić, Zoran and Periša, Jovana and Zeković, Ivana and Ćirić, Aleksandar and Antić, Željka and Dramićanin, Miroslav",
year = "2020",
publisher = "Belgrade : University of Belgrade, "Vinča" Institute of Nuclear Sciences",
journal = "1st Edition of the International Conference on the Physics of Optical Materials and Devices – Asia (ICOM-Asia 2020) : Book of Abstracts",
title = "Triple Ratiometric Temperature Read-Out in Luminescence Thermometry With YAG:Dy,Cr",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11986"
}

Đorđević, V., Ristić, Z., Periša, J., Zeković, I., Ćirić, A., Antić, Ž.,& Dramićanin, M.. (2020). Triple Ratiometric Temperature Read-Out in Luminescence Thermometry With YAG:Dy,Cr. in 1st Edition of the International Conference on the Physics of Optical Materials and Devices – Asia (ICOM-Asia 2020) : Book of Abstracts
Belgrade : University of Belgrade, "Vinča" Institute of Nuclear Sciences..
https://hdl.handle.net/21.15107/rcub_vinar_11986

Đorđević V, Ristić Z, Periša J, Zeković I, Ćirić A, Antić Ž, Dramićanin M. Triple Ratiometric Temperature Read-Out in Luminescence Thermometry With YAG:Dy,Cr. in 1st Edition of the International Conference on the Physics of Optical Materials and Devices – Asia (ICOM-Asia 2020) : Book of Abstracts. 2020;.
https://hdl.handle.net/21.15107/rcub_vinar_11986 .

Đorđević, Vesna, Ristić, Zoran, Periša, Jovana, Zeković, Ivana, Ćirić, Aleksandar, Antić, Željka, Dramićanin, Miroslav, "Triple Ratiometric Temperature Read-Out in Luminescence Thermometry With YAG:Dy,Cr" in 1st Edition of the International Conference on the Physics of Optical Materials and Devices – Asia (ICOM-Asia 2020) : Book of Abstracts (2020),
https://hdl.handle.net/21.15107/rcub_vinar_11986 .

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

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

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

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

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

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

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

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

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

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

TY  - JOUR
AU  - Kuzman, Sanja
AU  - Periša, Jovana
AU  - Đorđević, Vesna R.
AU  - Zeković, Ivana Lj.
AU  - Vukoje, Ivana D.
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9098
AB  - A promising way to improve the performance of luminescent materials is to combine them with noble metal nanoparticles. Herein, a set of silver/europium-doped lanthanum orthophosphate (Ag/La0.95Eu0.05PO4) nanostructures with different concentrations of silver nanoparticles were prepared and investigated. The presented overlap between the strongest europium (Eu3+) excitation line and the broad silver nanoparticle surface plasmon resonance makes the combination prospective for coupling. X-ray powder diffraction confirmed the monoclinic monazite structure. The transmission electron microscopy revealed particles with a rod-like shape and ~4 aspect ratio. Photoluminescence spectra show characteristic Eu3+ ion red emission. One of the requirements for an enhanced luminescence effect is the precise control of the distance between the noble metal nanoparticles and the emitter ion. The distance is indirectly varied throughout the change of Ag nanoparticle concentration in the La0.95Eu0.05PO4 host. The emission intensity increases with the increase in Ag nanoparticles up to 0.6 mol %, after which the luminescence decreases due to the nanoparticles’ close packing and aggregation leading to the displacement of La0.95Eu0.05PO4 from the vicinity of the metal particles and reabsorption of the emitted light. The emission intensity of La0.95Eu0.05PO4 increases more than three times when the Eu3+ excitation is supported by the localized surface plasmon resonance in the Ag/La0.95Eu0.05PO4 nanostructures.
T2  - Materials
T1  - Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles
VL  - 13
IS  - 14
SP  - 3071
DO  - 10.3390/ma13143071
ER  - 

@article{
author = "Kuzman, Sanja and Periša, Jovana and Đorđević, Vesna R. and Zeković, Ivana Lj. and Vukoje, Ivana D. and Antić, Željka and Dramićanin, Miroslav",
year = "2020",
abstract = "A promising way to improve the performance of luminescent materials is to combine them with noble metal nanoparticles. Herein, a set of silver/europium-doped lanthanum orthophosphate (Ag/La0.95Eu0.05PO4) nanostructures with different concentrations of silver nanoparticles were prepared and investigated. The presented overlap between the strongest europium (Eu3+) excitation line and the broad silver nanoparticle surface plasmon resonance makes the combination prospective for coupling. X-ray powder diffraction confirmed the monoclinic monazite structure. The transmission electron microscopy revealed particles with a rod-like shape and ~4 aspect ratio. Photoluminescence spectra show characteristic Eu3+ ion red emission. One of the requirements for an enhanced luminescence effect is the precise control of the distance between the noble metal nanoparticles and the emitter ion. The distance is indirectly varied throughout the change of Ag nanoparticle concentration in the La0.95Eu0.05PO4 host. The emission intensity increases with the increase in Ag nanoparticles up to 0.6 mol %, after which the luminescence decreases due to the nanoparticles’ close packing and aggregation leading to the displacement of La0.95Eu0.05PO4 from the vicinity of the metal particles and reabsorption of the emitted light. The emission intensity of La0.95Eu0.05PO4 increases more than three times when the Eu3+ excitation is supported by the localized surface plasmon resonance in the Ag/La0.95Eu0.05PO4 nanostructures.",
journal = "Materials",
title = "Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles",
volume = "13",
number = "14",
pages = "3071",
doi = "10.3390/ma13143071"
}

Kuzman, S., Periša, J., Đorđević, V. R., Zeković, I. Lj., Vukoje, I. D., Antić, Ž.,& Dramićanin, M.. (2020). Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles. in Materials, 13(14), 3071.
https://doi.org/10.3390/ma13143071

Kuzman S, Periša J, Đorđević VR, Zeković IL, Vukoje ID, Antić Ž, Dramićanin M. Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles. in Materials. 2020;13(14):3071.
doi:10.3390/ma13143071 .

Kuzman, Sanja, Periša, Jovana, Đorđević, Vesna R., Zeković, Ivana Lj., Vukoje, Ivana D., Antić, Željka, Dramićanin, Miroslav, "Surface Plasmon Enhancement of Eu3+ Emission Intensity in LaPO4/Ag Nanoparticles" in Materials, 13, no. 14 (2020):3071,
https://doi.org/10.3390/ma13143071 . .

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

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

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

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

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

TY  - JOUR
AU  - Dramićanin, Tatjana
AU  - Zeković, Ivana Lj.
AU  - Periša, Jovana
AU  - Dramićanin, Miroslav
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8434
AB  - Fluorescence excitation-emission matrices were measured for 111 samples of different types of beer and studied by the parallel factor analysis (PARAFAC). The 5-component PARAFAC model was found to suitably describes the beer fluorescence, accounting for 99.4% of the fluorescence variance in the measured set of samples, and providing the completely resolved excitation and emission spectra of each component. The model was chosen based on a model’s core consistency and split-half analysis. It is shown that beer fluorescence is the sum of fluorescence of aromatic amino acids (tryptophan, tyrosine, and phenylalanine), different forms of vitamin B, and phenolic compounds. Obtained PARAFAC model of beer fluorescence demonstrated the potential for the quantification and quality analysis of beer fluorophores and classification of different beer types. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.
T2  - Journal of Fluorescence
T1  - The Parallel Factor Analysis of Beer Fluorescence
VL  - 29
IS  - 5
SP  - 1103
EP  - 1111
DO  - 10.1007/s10895-019-02421-0
ER  - 

@article{
author = "Dramićanin, Tatjana and Zeković, Ivana Lj. and Periša, Jovana and Dramićanin, Miroslav",
year = "2019",
abstract = "Fluorescence excitation-emission matrices were measured for 111 samples of different types of beer and studied by the parallel factor analysis (PARAFAC). The 5-component PARAFAC model was found to suitably describes the beer fluorescence, accounting for 99.4% of the fluorescence variance in the measured set of samples, and providing the completely resolved excitation and emission spectra of each component. The model was chosen based on a model’s core consistency and split-half analysis. It is shown that beer fluorescence is the sum of fluorescence of aromatic amino acids (tryptophan, tyrosine, and phenylalanine), different forms of vitamin B, and phenolic compounds. Obtained PARAFAC model of beer fluorescence demonstrated the potential for the quantification and quality analysis of beer fluorophores and classification of different beer types. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.",
journal = "Journal of Fluorescence",
title = "The Parallel Factor Analysis of Beer Fluorescence",
volume = "29",
number = "5",
pages = "1103-1111",
doi = "10.1007/s10895-019-02421-0"
}

Dramićanin, T., Zeković, I. Lj., Periša, J.,& Dramićanin, M.. (2019). The Parallel Factor Analysis of Beer Fluorescence. in Journal of Fluorescence, 29(5), 1103-1111.
https://doi.org/10.1007/s10895-019-02421-0

Dramićanin T, Zeković IL, Periša J, Dramićanin M. The Parallel Factor Analysis of Beer Fluorescence. in Journal of Fluorescence. 2019;29(5):1103-1111.
doi:10.1007/s10895-019-02421-0 .

Dramićanin, Tatjana, Zeković, Ivana Lj., Periša, Jovana, Dramićanin, Miroslav, "The Parallel Factor Analysis of Beer Fluorescence" in Journal of Fluorescence, 29, no. 5 (2019):1103-1111,
https://doi.org/10.1007/s10895-019-02421-0 . .

TY  - JOUR
AU  - Dojčilović, Radovan
AU  - Pajović, Jelena D.
AU  - Božanić, Dušan K.
AU  - Jović, Nataša G.
AU  - Pavlović, Vera P.
AU  - Pavlović, Vladimir B.
AU  - Lenhardt Acković, Lea
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Miroslav
AU  - Kaščakova, Slavka
AU  - Refregiers, Matthieu
AU  - Rašić, Goran
AU  - Vlahović, Branislav
AU  - Đoković, Vladimir
PY  - 2018
UR  - http://stacks.iop.org/2053-1583/5/i=4/a=045019?key=crossref.f455f07bdfb3469c8077963ff0f38f95
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7909
AB  - The interaction of partially reduced graphene oxide (prGO) and Huh7.5.1 liver cancer cells was investigated by means of DUV fluorescence bioimaging. The prGO sample was obtained by the reduction (to a certain extent) of the initially prepared graphene oxide (GO) nanosheets with hydrazine. The fluorescence of the GO nanosheets increases with time of the reduction due to a change in ratio of the sp2 and sp3 carbon sites and the prGO sample was extracted from the dispersion after 6 min, when the intensity of the fluorescence reached its maximum. The reduction process was left to proceed further to saturation until highly reduced graphene oxide (denoted here as rGO) was obtained. GO, prGO and rGO samples were investigated by structural (scanning electron microscopy (SEM), scanning transmission electron microscopy coupled with energy dispersive spectrometry (STEM-EDS)) and spectroscopic (UV-vis, photoluminescence (PL), Raman) methods. After that, Huh7.5.1 cells were incubated with GO, prGO and rGO nanosheets and used in bioimaging studies, which were performed on DISCO beamline of synchrotron SOLEIL. It was found that the prGO significantly enhanced the fluorescence of the cells and increased the intensity of the signal by ~2.5 times. Time-lapse fluorescence microscopy experiments showed that fluorescence dynamics strongly depends on the type of nanosheets used. The obtained prGO nanostructure can be easily conjugated with aromatic ring containing drugs, which opens a possibility for its applications in fluorescence microscopy monitored drug delivery. © 2018 IOP Publishing Ltd.
T2  - 2D Materials
T1  - DUV fluorescence bioimaging study of the interaction of partially reduced graphene oxide and liver cancer cells
VL  - 5
IS  - 4
SP  - 045019
DO  - 10.1088/2053-1583/aad72b
ER  - 

@article{
author = "Dojčilović, Radovan and Pajović, Jelena D. and Božanić, Dušan K. and Jović, Nataša G. and Pavlović, Vera P. and Pavlović, Vladimir B. and Lenhardt Acković, Lea and Zeković, Ivana Lj. and Dramićanin, Miroslav and Kaščakova, Slavka and Refregiers, Matthieu and Rašić, Goran and Vlahović, Branislav and Đoković, Vladimir",
year = "2018",
abstract = "The interaction of partially reduced graphene oxide (prGO) and Huh7.5.1 liver cancer cells was investigated by means of DUV fluorescence bioimaging. The prGO sample was obtained by the reduction (to a certain extent) of the initially prepared graphene oxide (GO) nanosheets with hydrazine. The fluorescence of the GO nanosheets increases with time of the reduction due to a change in ratio of the sp2 and sp3 carbon sites and the prGO sample was extracted from the dispersion after 6 min, when the intensity of the fluorescence reached its maximum. The reduction process was left to proceed further to saturation until highly reduced graphene oxide (denoted here as rGO) was obtained. GO, prGO and rGO samples were investigated by structural (scanning electron microscopy (SEM), scanning transmission electron microscopy coupled with energy dispersive spectrometry (STEM-EDS)) and spectroscopic (UV-vis, photoluminescence (PL), Raman) methods. After that, Huh7.5.1 cells were incubated with GO, prGO and rGO nanosheets and used in bioimaging studies, which were performed on DISCO beamline of synchrotron SOLEIL. It was found that the prGO significantly enhanced the fluorescence of the cells and increased the intensity of the signal by ~2.5 times. Time-lapse fluorescence microscopy experiments showed that fluorescence dynamics strongly depends on the type of nanosheets used. The obtained prGO nanostructure can be easily conjugated with aromatic ring containing drugs, which opens a possibility for its applications in fluorescence microscopy monitored drug delivery. © 2018 IOP Publishing Ltd.",
journal = "2D Materials",
title = "DUV fluorescence bioimaging study of the interaction of partially reduced graphene oxide and liver cancer cells",
volume = "5",
number = "4",
pages = "045019",
doi = "10.1088/2053-1583/aad72b"
}

Dojčilović, R., Pajović, J. D., Božanić, D. K., Jović, N. G., Pavlović, V. P., Pavlović, V. B., Lenhardt Acković, L., Zeković, I. Lj., Dramićanin, M., Kaščakova, S., Refregiers, M., Rašić, G., Vlahović, B.,& Đoković, V.. (2018). DUV fluorescence bioimaging study of the interaction of partially reduced graphene oxide and liver cancer cells. in 2D Materials, 5(4), 045019.
https://doi.org/10.1088/2053-1583/aad72b

Dojčilović R, Pajović JD, Božanić DK, Jović NG, Pavlović VP, Pavlović VB, Lenhardt Acković L, Zeković IL, Dramićanin M, Kaščakova S, Refregiers M, Rašić G, Vlahović B, Đoković V. DUV fluorescence bioimaging study of the interaction of partially reduced graphene oxide and liver cancer cells. in 2D Materials. 2018;5(4):045019.
doi:10.1088/2053-1583/aad72b .

Dojčilović, Radovan, Pajović, Jelena D., Božanić, Dušan K., Jović, Nataša G., Pavlović, Vera P., Pavlović, Vladimir B., Lenhardt Acković, Lea, Zeković, Ivana Lj., Dramićanin, Miroslav, Kaščakova, Slavka, Refregiers, Matthieu, Rašić, Goran, Vlahović, Branislav, Đoković, Vladimir, "DUV fluorescence bioimaging study of the interaction of partially reduced graphene oxide and liver cancer cells" in 2D Materials, 5, no. 4 (2018):045019,
https://doi.org/10.1088/2053-1583/aad72b . .

TY  - CONF
AU  - Radovanović, Lidija
AU  - Vulić, Predrag
AU  - Radovanović, Željko
AU  - Balanč, Bojana
AU  - Simović, Bojana
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Miroslav
AU  - Rogan, Jelena R.
PY  - 2018
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8737
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - Synthesis, Structure, Morphology and Properties of Biphasic ZnO–ZnMn2O4
SP  - 171
EP  - 173
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8737
ER  - 

@conference{
author = "Radovanović, Lidija and Vulić, Predrag and Radovanović, Željko and Balanč, Bojana and Simović, Bojana and Zeković, Ivana Lj. and Dramićanin, Miroslav and Rogan, Jelena R.",
year = "2018",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "Synthesis, Structure, Morphology and Properties of Biphasic ZnO–ZnMn2O4",
pages = "171-173",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8737"
}

Radovanović, L., Vulić, P., Radovanović, Ž., Balanč, B., Simović, B., Zeković, I. Lj., Dramićanin, M.,& Rogan, J. R.. (2018). Synthesis, Structure, Morphology and Properties of Biphasic ZnO–ZnMn2O4. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 171-173.
https://hdl.handle.net/21.15107/rcub_vinar_8737

Radovanović L, Vulić P, Radovanović Ž, Balanč B, Simović B, Zeković IL, Dramićanin M, Rogan JR. Synthesis, Structure, Morphology and Properties of Biphasic ZnO–ZnMn2O4. in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:171-173.
https://hdl.handle.net/21.15107/rcub_vinar_8737 .

Radovanović, Lidija, Vulić, Predrag, Radovanović, Željko, Balanč, Bojana, Simović, Bojana, Zeković, Ivana Lj., Dramićanin, Miroslav, Rogan, Jelena R., "Synthesis, Structure, Morphology and Properties of Biphasic ZnO–ZnMn2O4" in Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):171-173,
https://hdl.handle.net/21.15107/rcub_vinar_8737 .

TY  - JOUR
AU  - Dramićanin, Tatjana
AU  - Lenhardt Acković, Lea
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Miroslav
PY  - 2018
UR  - https://www.hindawi.com/journals/jspec/2018/8395212/
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7800
AB  - Honey is a frequent target of adulteration through inappropriate production practices and origin mislabelling. Current methods for the detection of adulterated honey are time and labor consuming, require highly skilled personnel, and lengthy sample preparation. Fluorescence spectroscopy overcomes such drawbacks, as it is fast and noncontact and requires minimal sample preparation. In this paper, the application of fluorescence spectroscopy coupled with statistical tools for the detection of adulterated honey is demonstrated. For this purpose, fluorescence excitation-emission matrices were measured for 99 samples of different types of natural honey and 15 adulterated honey samples (in 3 technical replicas for each sample). Statistical t -test showed that significant differences between fluorescence of natural and adulterated honey samples exist in 5 spectral regions: (1) excitation: 240–265 nm, emission: 370–495 nm; (2) excitation: 280–320 nm, emission: 390–470 nm; (3) excitation: 260–285 nm, emission: 320–370 nm; (4) excitation: 310–360 nm, emission: 370–470 nm; and (5) excitation: 375–435 nm, emission: 440–520 nm, in which majority of fluorescence comes from the aromatic amino acids, phenolic compounds, and fluorescent Maillard reaction products. Principal component analysis confirmed these findings and showed that 90% of variance in fluorescence is accumulated in the first two principal components, which can be used for the discrimination of fake honey samples. The classification of honey from fluorescence data is demonstrated with a linear discriminant analysis (LDA). When subjected to LDA, total fluorescence intensities of selected spectral regions provided classification of honey (natural or adulterated) with 100% accuracy. In addition, it is demonstrated that intensities of honey emissions in each of these spectral regions may serve as criteria for the discrimination between natural and fake honey.
T2  - Journal of Spectroscopy
T1  - Detection of Adulterated Honey by Fluorescence Excitation-Emission Matrices
VL  - 2018
SP  - 1
EP  - 6
DO  - 10.1155/2018/8395212
ER  - 

@article{
author = "Dramićanin, Tatjana and Lenhardt Acković, Lea and Zeković, Ivana Lj. and Dramićanin, Miroslav",
year = "2018",
abstract = "Honey is a frequent target of adulteration through inappropriate production practices and origin mislabelling. Current methods for the detection of adulterated honey are time and labor consuming, require highly skilled personnel, and lengthy sample preparation. Fluorescence spectroscopy overcomes such drawbacks, as it is fast and noncontact and requires minimal sample preparation. In this paper, the application of fluorescence spectroscopy coupled with statistical tools for the detection of adulterated honey is demonstrated. For this purpose, fluorescence excitation-emission matrices were measured for 99 samples of different types of natural honey and 15 adulterated honey samples (in 3 technical replicas for each sample). Statistical t -test showed that significant differences between fluorescence of natural and adulterated honey samples exist in 5 spectral regions: (1) excitation: 240–265 nm, emission: 370–495 nm; (2) excitation: 280–320 nm, emission: 390–470 nm; (3) excitation: 260–285 nm, emission: 320–370 nm; (4) excitation: 310–360 nm, emission: 370–470 nm; and (5) excitation: 375–435 nm, emission: 440–520 nm, in which majority of fluorescence comes from the aromatic amino acids, phenolic compounds, and fluorescent Maillard reaction products. Principal component analysis confirmed these findings and showed that 90% of variance in fluorescence is accumulated in the first two principal components, which can be used for the discrimination of fake honey samples. The classification of honey from fluorescence data is demonstrated with a linear discriminant analysis (LDA). When subjected to LDA, total fluorescence intensities of selected spectral regions provided classification of honey (natural or adulterated) with 100% accuracy. In addition, it is demonstrated that intensities of honey emissions in each of these spectral regions may serve as criteria for the discrimination between natural and fake honey.",
journal = "Journal of Spectroscopy",
title = "Detection of Adulterated Honey by Fluorescence Excitation-Emission Matrices",
volume = "2018",
pages = "1-6",
doi = "10.1155/2018/8395212"
}

Dramićanin, T., Lenhardt Acković, L., Zeković, I. Lj.,& Dramićanin, M.. (2018). Detection of Adulterated Honey by Fluorescence Excitation-Emission Matrices. in Journal of Spectroscopy, 2018, 1-6.
https://doi.org/10.1155/2018/8395212

Dramićanin T, Lenhardt Acković L, Zeković IL, Dramićanin M. Detection of Adulterated Honey by Fluorescence Excitation-Emission Matrices. in Journal of Spectroscopy. 2018;2018:1-6.
doi:10.1155/2018/8395212 .

Dramićanin, Tatjana, Lenhardt Acković, Lea, Zeković, Ivana Lj., Dramićanin, Miroslav, "Detection of Adulterated Honey by Fluorescence Excitation-Emission Matrices" in Journal of Spectroscopy, 2018 (2018):1-6,
https://doi.org/10.1155/2018/8395212 . .

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  - JOUR
AU  - Laban, Bojana B.
AU  - Zeković, Ivana Lj.
AU  - Vasić Anićijević, Dragana D.
AU  - Marković, Mirjana
AU  - Vodnik, Vesna
AU  - Luce, Marco
AU  - Cricenti, Antonio
AU  - Dramićanin, Miroslav
AU  - Vasić, Vesna M.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1212
AB  - The paper presents the results of the experimental and theoretical study of 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt (TC) adsorption and J-aggregation on the surface of citrate-capped silver nano particles (AgNPs) with an average particle size 10 nm. Various nanospectroscopy techniques such as UV-vis, TEM, AFM, DLS, zeta potential, and fluorescence measurements were carried out in order to characterize the hybrid system. Besides this, a set of simple density functional theory calculations (DFT) was performed and this suggested that TC dye, from the thermodynamical point of view, most likely interacted with AgNPs via oxygen atom from SO3- groups. The methods, which considered AgNPs as the macromolecule with several binding sites and TC dye as the ligand, were applied for the analysis of saturation curves constructed from the fluorescence data to obtain the binding constant (K-a = 1.5 x 10(6) M-1) and the average number of TC dye molecules bonded per AgNP (similar to 330). Moreover, TC fluorescence was quenched in the presence of AgNPs on the concentration dependent manner, yielding the linear Stern-Volmer relation accounting for both static and dynamic quenching with the quenching constant K-sv = 2.5 x 10(8) M-1. Kinetic measurements of J-aggregation as the dependence of AgNPs/TC concentration ratio confirmed that the J-aggregation occurred via a two-step process, the first of them being the initial adsorption of dye on AgNPs surface, followed by dye molecules rearrangement and the consecutive growth of TC aggregate layers.
T2  - Journal of Physical Chemistry. C
T1  - Mechanism of 3,3 -Disulfopropyl-5,5 -Dichlorothiacyanine Anion Interaction With Citrate-Capped Silver Nanoparticles: Adsorption and J-Aggregation
VL  - 120
IS  - 32
SP  - 18066
EP  - 18074
DO  - 10.1021/acs.jpcc.6b05124
ER  - 

@article{
author = "Laban, Bojana B. and Zeković, Ivana Lj. and Vasić Anićijević, Dragana D. and Marković, Mirjana and Vodnik, Vesna and Luce, Marco and Cricenti, Antonio and Dramićanin, Miroslav and Vasić, Vesna M.",
year = "2016",
abstract = "The paper presents the results of the experimental and theoretical study of 3,3-disulfopropyl-5,5-dichlorothiacyanine sodium salt (TC) adsorption and J-aggregation on the surface of citrate-capped silver nano particles (AgNPs) with an average particle size 10 nm. Various nanospectroscopy techniques such as UV-vis, TEM, AFM, DLS, zeta potential, and fluorescence measurements were carried out in order to characterize the hybrid system. Besides this, a set of simple density functional theory calculations (DFT) was performed and this suggested that TC dye, from the thermodynamical point of view, most likely interacted with AgNPs via oxygen atom from SO3- groups. The methods, which considered AgNPs as the macromolecule with several binding sites and TC dye as the ligand, were applied for the analysis of saturation curves constructed from the fluorescence data to obtain the binding constant (K-a = 1.5 x 10(6) M-1) and the average number of TC dye molecules bonded per AgNP (similar to 330). Moreover, TC fluorescence was quenched in the presence of AgNPs on the concentration dependent manner, yielding the linear Stern-Volmer relation accounting for both static and dynamic quenching with the quenching constant K-sv = 2.5 x 10(8) M-1. Kinetic measurements of J-aggregation as the dependence of AgNPs/TC concentration ratio confirmed that the J-aggregation occurred via a two-step process, the first of them being the initial adsorption of dye on AgNPs surface, followed by dye molecules rearrangement and the consecutive growth of TC aggregate layers.",
journal = "Journal of Physical Chemistry. C",
title = "Mechanism of 3,3 -Disulfopropyl-5,5 -Dichlorothiacyanine Anion Interaction With Citrate-Capped Silver Nanoparticles: Adsorption and J-Aggregation",
volume = "120",
number = "32",
pages = "18066-18074",
doi = "10.1021/acs.jpcc.6b05124"
}

Laban, B. B., Zeković, I. Lj., Vasić Anićijević, D. D., Marković, M., Vodnik, V., Luce, M., Cricenti, A., Dramićanin, M.,& Vasić, V. M.. (2016). Mechanism of 3,3 -Disulfopropyl-5,5 -Dichlorothiacyanine Anion Interaction With Citrate-Capped Silver Nanoparticles: Adsorption and J-Aggregation. in Journal of Physical Chemistry. C, 120(32), 18066-18074.
https://doi.org/10.1021/acs.jpcc.6b05124

Laban BB, Zeković IL, Vasić Anićijević DD, Marković M, Vodnik V, Luce M, Cricenti A, Dramićanin M, Vasić VM. Mechanism of 3,3 -Disulfopropyl-5,5 -Dichlorothiacyanine Anion Interaction With Citrate-Capped Silver Nanoparticles: Adsorption and J-Aggregation. in Journal of Physical Chemistry. C. 2016;120(32):18066-18074.
doi:10.1021/acs.jpcc.6b05124 .

Laban, Bojana B., Zeković, Ivana Lj., Vasić Anićijević, Dragana D., Marković, Mirjana, Vodnik, Vesna, Luce, Marco, Cricenti, Antonio, Dramićanin, Miroslav, Vasić, Vesna M., "Mechanism of 3,3 -Disulfopropyl-5,5 -Dichlorothiacyanine Anion Interaction With Citrate-Capped Silver Nanoparticles: Adsorption and J-Aggregation" in Journal of Physical Chemistry. C, 120, no. 32 (2016):18066-18074,
https://doi.org/10.1021/acs.jpcc.6b05124 . .

TY  - JOUR
AU  - Manojlović, Dragica
AU  - Dramićanin, Miroslav
AU  - Milošević, Miloš
AU  - Zeković, Ivana Lj.
AU  - Cvijović-Alagić, Ivana
AU  - Mitrović, Nenad
AU  - Miletić, Vesna
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/798
AB  - This study investigated the degree of conversion, depth of cure, Vickers hardness, flexural strength, flexural modulus and volumetric shrinkage of experimental composite containing a low shrinkage monomer FIT-852 (FIT; Esstech Inc.) and photoinitiator 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO; Sigma Aldrich) compared to conventional composite containing Bisphenol A-glycidyl methacrylate (BisGMA) and camphorquinone-amine photoinitiator system. The degree of conversion was generally higher in FIT-based composites (45-64% range) than in BisGMA-based composites (34-58% range). Vickers hardness, flexural strength and modulus were higher in BisGMA-based composites. A polywave light-curing unit was generally more efficient in terms of conversion and hardness of experimental composites than a monowave unit. FIT-based composite containing TPO showed the depth of cure below 2 mm irrespective of the curing light. The depth of cure of FIT-based composite containing CQ and BisGMA-based composites with either photoinitiator was in the range of 2.8-3.0 mm. Volumetric shrinkage of FIT-based composite (0.9-5.7% range) was lower than that of BisGMA-based composite (2.2-12% range). FIT may be used as a shrinkage reducing monomer compatible with the conventional CQ-amine system as well as the alternative TPO photoinitiator. However, the depth of cure of FIT_TPO composite requires boosting to achieve clinically recommended thickness of 2 mm. (C) 2015 Elsevier B.V. All rights reserved.
T2  - Materials Science and Engineering. C: Materials for Biological Applications
T1  - Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites
VL  - 58
SP  - 487
EP  - 494
DO  - 10.1016/j.msec.2015.08.054
ER  - 

@article{
author = "Manojlović, Dragica and Dramićanin, Miroslav and Milošević, Miloš and Zeković, Ivana Lj. and Cvijović-Alagić, Ivana and Mitrović, Nenad and Miletić, Vesna",
year = "2016",
abstract = "This study investigated the degree of conversion, depth of cure, Vickers hardness, flexural strength, flexural modulus and volumetric shrinkage of experimental composite containing a low shrinkage monomer FIT-852 (FIT; Esstech Inc.) and photoinitiator 2,4,6-trimethylbenzoyldiphenylphosphine oxide (TPO; Sigma Aldrich) compared to conventional composite containing Bisphenol A-glycidyl methacrylate (BisGMA) and camphorquinone-amine photoinitiator system. The degree of conversion was generally higher in FIT-based composites (45-64% range) than in BisGMA-based composites (34-58% range). Vickers hardness, flexural strength and modulus were higher in BisGMA-based composites. A polywave light-curing unit was generally more efficient in terms of conversion and hardness of experimental composites than a monowave unit. FIT-based composite containing TPO showed the depth of cure below 2 mm irrespective of the curing light. The depth of cure of FIT-based composite containing CQ and BisGMA-based composites with either photoinitiator was in the range of 2.8-3.0 mm. Volumetric shrinkage of FIT-based composite (0.9-5.7% range) was lower than that of BisGMA-based composite (2.2-12% range). FIT may be used as a shrinkage reducing monomer compatible with the conventional CQ-amine system as well as the alternative TPO photoinitiator. However, the depth of cure of FIT_TPO composite requires boosting to achieve clinically recommended thickness of 2 mm. (C) 2015 Elsevier B.V. All rights reserved.",
journal = "Materials Science and Engineering. C: Materials for Biological Applications",
title = "Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites",
volume = "58",
pages = "487-494",
doi = "10.1016/j.msec.2015.08.054"
}

Manojlović, D., Dramićanin, M., Milošević, M., Zeković, I. Lj., Cvijović-Alagić, I., Mitrović, N.,& Miletić, V.. (2016). Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites. in Materials Science and Engineering. C: Materials for Biological Applications, 58, 487-494.
https://doi.org/10.1016/j.msec.2015.08.054

Manojlović D, Dramićanin M, Milošević M, Zeković IL, Cvijović-Alagić I, Mitrović N, Miletić V. Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites. in Materials Science and Engineering. C: Materials for Biological Applications. 2016;58:487-494.
doi:10.1016/j.msec.2015.08.054 .

Manojlović, Dragica, Dramićanin, Miroslav, Milošević, Miloš, Zeković, Ivana Lj., Cvijović-Alagić, Ivana, Mitrović, Nenad, Miletić, Vesna, "Effects of a low-Shrinkage methacrylate monomer and monoacylphosphine oxide photoinitiator on curing efficiency and mechanical properties of experimental resin-based composites" in Materials Science and Engineering. C: Materials for Biological Applications, 58 (2016):487-494,
https://doi.org/10.1016/j.msec.2015.08.054 . .

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  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Petković, Branka B.
AU  - Dekić, Vidosav
AU  - Marković, Gordana
AU  - Zeković, Ivana Lj.
AU  - Marinović-Cincović, Milena
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1025
AB  - In this study, the thermal behavior of modified urea-formaldehyde (UF) resin with nanosilica (nano-SiO2), wood flour (WF), and their mixture of SiO2/WF was investigated. Five modified UF hybrid composite materials with 0.8 F/U ratio with different filler were synthesized using the same procedure. The thermal behavior of materials was studied using nonisothermal thermogravimetric analysis, differential thermal gravimetry (DTG), and differential thermal analysis and supported by data from infrared spectroscopy. The shift of DTG peaks to a high temperature indicates the increase in thermal stability of modified UF resin with hybrid SiO2/WF fillers, which is confirmed by the data obtained from the Fourier transform infrared spectroscopic study. It was estimated that the UF/WF samples based on nano-SiO2 have better thermal stability.
T2  - Journal of Thermoplastic Composite Materials
T1  - Nanosilica and wood flour-modified urea-formaldehyde composites
VL  - 29
IS  - 5
SP  - 656
EP  - 669
DO  - 10.1177/0892705714531977
ER  - 

@article{
author = "Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Petković, Branka B. and Dekić, Vidosav and Marković, Gordana and Zeković, Ivana Lj. and Marinović-Cincović, Milena",
year = "2016",
abstract = "In this study, the thermal behavior of modified urea-formaldehyde (UF) resin with nanosilica (nano-SiO2), wood flour (WF), and their mixture of SiO2/WF was investigated. Five modified UF hybrid composite materials with 0.8 F/U ratio with different filler were synthesized using the same procedure. The thermal behavior of materials was studied using nonisothermal thermogravimetric analysis, differential thermal gravimetry (DTG), and differential thermal analysis and supported by data from infrared spectroscopy. The shift of DTG peaks to a high temperature indicates the increase in thermal stability of modified UF resin with hybrid SiO2/WF fillers, which is confirmed by the data obtained from the Fourier transform infrared spectroscopic study. It was estimated that the UF/WF samples based on nano-SiO2 have better thermal stability.",
journal = "Journal of Thermoplastic Composite Materials",
title = "Nanosilica and wood flour-modified urea-formaldehyde composites",
volume = "29",
number = "5",
pages = "656-669",
doi = "10.1177/0892705714531977"
}

Samaržija-Jovanović, S., Jovanović, V., Petković, B. B., Dekić, V., Marković, G., Zeković, I. Lj.,& Marinović-Cincović, M.. (2016). Nanosilica and wood flour-modified urea-formaldehyde composites. in Journal of Thermoplastic Composite Materials, 29(5), 656-669.
https://doi.org/10.1177/0892705714531977

Samaržija-Jovanović S, Jovanović V, Petković BB, Dekić V, Marković G, Zeković IL, Marinović-Cincović M. Nanosilica and wood flour-modified urea-formaldehyde composites. in Journal of Thermoplastic Composite Materials. 2016;29(5):656-669.
doi:10.1177/0892705714531977 .

Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Petković, Branka B., Dekić, Vidosav, Marković, Gordana, Zeković, Ivana Lj., Marinović-Cincović, Milena, "Nanosilica and wood flour-modified urea-formaldehyde composites" in Journal of Thermoplastic Composite Materials, 29, no. 5 (2016):656-669,
https://doi.org/10.1177/0892705714531977 . .

TY  - JOUR
AU  - Lenhardt, Lea I.
AU  - Bro, Rasmus
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Tatjana
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/382
AB  - Fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC) and Partial least squares Discriminant Analysis (PLS DA) were used for characterization and classification of honey. Excitation emission spectra were obtained for 95 honey samples of different botanical origin (acacia, sunflower, linden, meadow, and fake honey) by recording emission from 270 to 640 nm with excitation in the range of 240-500 nm. The number of fluorophores present in honey, excitation and emission spectra of each fluorophore, and their relative concentration are determined using a six-component PARAFAC model. Emissions from phenolic compounds and Maillard reaction products exhibited the largest difference among classes of honey of different botanical origin. The PLS DA classification model, constructed from PARAFAC model scores, detected fake honey samples with 100% sensitivity and specificity. Honey samples were also classified using PLS DA with errors of 0.5% for linden, 10% for acacia, and about 20% for both sunflower and meadow mix. (c) 2014 Elsevier Ltd. All rights reserved.
T2  - Food Chemistry
T1  - Fluorescence spectroscopy coupled with PARAFAC and PLS DA for characterization and classification of honey
VL  - 175
SP  - 284
EP  - 291
DO  - 10.1016/j.foodchem.2014.11.162
ER  - 

@article{
author = "Lenhardt, Lea I. and Bro, Rasmus and Zeković, Ivana Lj. and Dramićanin, Tatjana and Dramićanin, Miroslav",
year = "2015",
abstract = "Fluorescence spectroscopy coupled with parallel factor analysis (PARAFAC) and Partial least squares Discriminant Analysis (PLS DA) were used for characterization and classification of honey. Excitation emission spectra were obtained for 95 honey samples of different botanical origin (acacia, sunflower, linden, meadow, and fake honey) by recording emission from 270 to 640 nm with excitation in the range of 240-500 nm. The number of fluorophores present in honey, excitation and emission spectra of each fluorophore, and their relative concentration are determined using a six-component PARAFAC model. Emissions from phenolic compounds and Maillard reaction products exhibited the largest difference among classes of honey of different botanical origin. The PLS DA classification model, constructed from PARAFAC model scores, detected fake honey samples with 100% sensitivity and specificity. Honey samples were also classified using PLS DA with errors of 0.5% for linden, 10% for acacia, and about 20% for both sunflower and meadow mix. (c) 2014 Elsevier Ltd. All rights reserved.",
journal = "Food Chemistry",
title = "Fluorescence spectroscopy coupled with PARAFAC and PLS DA for characterization and classification of honey",
volume = "175",
pages = "284-291",
doi = "10.1016/j.foodchem.2014.11.162"
}

Lenhardt, L. I., Bro, R., Zeković, I. Lj., Dramićanin, T.,& Dramićanin, M.. (2015). Fluorescence spectroscopy coupled with PARAFAC and PLS DA for characterization and classification of honey. in Food Chemistry, 175, 284-291.
https://doi.org/10.1016/j.foodchem.2014.11.162

Lenhardt LI, Bro R, Zeković IL, Dramićanin T, Dramićanin M. Fluorescence spectroscopy coupled with PARAFAC and PLS DA for characterization and classification of honey. in Food Chemistry. 2015;175:284-291.
doi:10.1016/j.foodchem.2014.11.162 .

Lenhardt, Lea I., Bro, Rasmus, Zeković, Ivana Lj., Dramićanin, Tatjana, Dramićanin, Miroslav, "Fluorescence spectroscopy coupled with PARAFAC and PLS DA for characterization and classification of honey" in Food Chemistry, 175 (2015):284-291,
https://doi.org/10.1016/j.foodchem.2014.11.162 . .

TY  - JOUR
AU  - Samaržija-Jovanović, Suzana
AU  - Jovanović, Vojislav
AU  - Marković, Gordana
AU  - Zeković, Ivana Lj.
AU  - Marinović-Cincović, Milena
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5878
AB  - Opalized white tuff (OWT) with 40 mu m average particle size and 39.3m(2)/g specific surface area has been introduced into polyisoprene rubber (NR). Their reinforcing effects were evaluated by comparisons with those from precipitated silica (PSi). The cure characteristic, apparent activation energy of cross-link (E-ac) and reversion (E-ar), and mechanical properties of a variety of composites based on these rubbers were studied. This was done using vulcanization techniques, mechanical testing, and scanning electron microscopy (SEM). The results showed that OWT can greatly improve the vulcanizing process by shortening the time of optimum cure (t(c90)) and the scorch time (t(s2)) of cross-linked rubber composites, which improves production efficiency and operational security. The rubber composites filled with 50 phr of OWT were found to have good mechanical and elastomeric properties. The tensile strengths of the NR/OWT composites are close to those of NR/PSi composites, but the tear strength and modulus are not as good as the corresponding properties of those containing precipitated silica. Morphology results revealed that theOWT is poorly dispersed in the rubber matrix. According to that, the lower interactions betweenOWT and polyisoprene rubber macromolecules are obtained, but similar mechanical properties of NR/OWT (100/50) rubber composites compared with NR/PSi (100/50) rubber composites are resulted.
T2  - Scientific World Journal
T1  - Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica
DO  - 10.1155/2014/913197
ER  - 

@article{
author = "Samaržija-Jovanović, Suzana and Jovanović, Vojislav and Marković, Gordana and Zeković, Ivana Lj. and Marinović-Cincović, Milena",
year = "2014",
abstract = "Opalized white tuff (OWT) with 40 mu m average particle size and 39.3m(2)/g specific surface area has been introduced into polyisoprene rubber (NR). Their reinforcing effects were evaluated by comparisons with those from precipitated silica (PSi). The cure characteristic, apparent activation energy of cross-link (E-ac) and reversion (E-ar), and mechanical properties of a variety of composites based on these rubbers were studied. This was done using vulcanization techniques, mechanical testing, and scanning electron microscopy (SEM). The results showed that OWT can greatly improve the vulcanizing process by shortening the time of optimum cure (t(c90)) and the scorch time (t(s2)) of cross-linked rubber composites, which improves production efficiency and operational security. The rubber composites filled with 50 phr of OWT were found to have good mechanical and elastomeric properties. The tensile strengths of the NR/OWT composites are close to those of NR/PSi composites, but the tear strength and modulus are not as good as the corresponding properties of those containing precipitated silica. Morphology results revealed that theOWT is poorly dispersed in the rubber matrix. According to that, the lower interactions betweenOWT and polyisoprene rubber macromolecules are obtained, but similar mechanical properties of NR/OWT (100/50) rubber composites compared with NR/PSi (100/50) rubber composites are resulted.",
journal = "Scientific World Journal",
title = "Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica",
doi = "10.1155/2014/913197"
}

Samaržija-Jovanović, S., Jovanović, V., Marković, G., Zeković, I. Lj.,& Marinović-Cincović, M.. (2014). Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica. in Scientific World Journal.
https://doi.org/10.1155/2014/913197

Samaržija-Jovanović S, Jovanović V, Marković G, Zeković IL, Marinović-Cincović M. Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica. in Scientific World Journal. 2014;.
doi:10.1155/2014/913197 .

Samaržija-Jovanović, Suzana, Jovanović, Vojislav, Marković, Gordana, Zeković, Ivana Lj., Marinović-Cincović, Milena, "Properties of Vulcanized Polyisoprene Rubber Composites Filled with Opalized White Tuff and Precipitated Silica" in Scientific World Journal (2014),
https://doi.org/10.1155/2014/913197 . .

TY  - JOUR
AU  - Lenhardt, Lea I.
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Tatjana
AU  - Dramićanin, Miroslav
AU  - Bro, Rasmus
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5981
AB  - Front-face synchronous fluorescence spectroscopy combined with chemometrics is used to classify honey samples according to their botanical origin. Synchronous fluorescence spectra of three monofloral (linden, sunflower, and acacia), polyfloral (meadow mix), and fake (fake acacia and linden) honey types (109 samples) were collected in an excitation range of 240-500 nm for synchronous wavelength intervals of 30-300 nm. Chemometric analysis of the gathered data included principal component analysis and partial least squares discriminant analysis. Mean cross-validated classification errors of 0.2 and 4.8% were found for a model that accounts only for monofloral samples and for a model that includes both the monofloral and polyfloral groups, respectively. The results demonstrate that single synchronous fluorescence spectra of different honeys differ significantly because of their distinct physical and chemical characteristics and provide sufficient data for the clear differentiation among honey groups. The spectra of fake honey samples showed pronounced differences from those of genuine honey, and these samples are easily recognized on the basis of their synchronous fluorescence spectra. The study demonstrated that this method is a valuable and promising technique for honey authentication.
T2  - Applied Spectroscopy
T1  - Determination of the Botanical Origin of Honey by Front-Face Synchronous Fluorescence Spectroscopy
VL  - 68
IS  - 5
SP  - 557
EP  - 563
DO  - 10.1366/13-07325
ER  - 

@article{
author = "Lenhardt, Lea I. and Zeković, Ivana Lj. and Dramićanin, Tatjana and Dramićanin, Miroslav and Bro, Rasmus",
year = "2014",
abstract = "Front-face synchronous fluorescence spectroscopy combined with chemometrics is used to classify honey samples according to their botanical origin. Synchronous fluorescence spectra of three monofloral (linden, sunflower, and acacia), polyfloral (meadow mix), and fake (fake acacia and linden) honey types (109 samples) were collected in an excitation range of 240-500 nm for synchronous wavelength intervals of 30-300 nm. Chemometric analysis of the gathered data included principal component analysis and partial least squares discriminant analysis. Mean cross-validated classification errors of 0.2 and 4.8% were found for a model that accounts only for monofloral samples and for a model that includes both the monofloral and polyfloral groups, respectively. The results demonstrate that single synchronous fluorescence spectra of different honeys differ significantly because of their distinct physical and chemical characteristics and provide sufficient data for the clear differentiation among honey groups. The spectra of fake honey samples showed pronounced differences from those of genuine honey, and these samples are easily recognized on the basis of their synchronous fluorescence spectra. The study demonstrated that this method is a valuable and promising technique for honey authentication.",
journal = "Applied Spectroscopy",
title = "Determination of the Botanical Origin of Honey by Front-Face Synchronous Fluorescence Spectroscopy",
volume = "68",
number = "5",
pages = "557-563",
doi = "10.1366/13-07325"
}

Lenhardt, L. I., Zeković, I. Lj., Dramićanin, T., Dramićanin, M.,& Bro, R.. (2014). Determination of the Botanical Origin of Honey by Front-Face Synchronous Fluorescence Spectroscopy. in Applied Spectroscopy, 68(5), 557-563.
https://doi.org/10.1366/13-07325

Lenhardt LI, Zeković IL, Dramićanin T, Dramićanin M, Bro R. Determination of the Botanical Origin of Honey by Front-Face Synchronous Fluorescence Spectroscopy. in Applied Spectroscopy. 2014;68(5):557-563.
doi:10.1366/13-07325 .

Lenhardt, Lea I., Zeković, Ivana Lj., Dramićanin, Tatjana, Dramićanin, Miroslav, Bro, Rasmus, "Determination of the Botanical Origin of Honey by Front-Face Synchronous Fluorescence Spectroscopy" in Applied Spectroscopy, 68, no. 5 (2014):557-563,
https://doi.org/10.1366/13-07325 . .

TY  - JOUR
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Tatjana
AU  - Lenhardt, Lea I.
AU  - Bandic, Jadran
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6088
AB  - Novel optical spectroscopy and imaging methods may be valuable in the early detection of cancer. This paper reports differences in the luminescence responses of pigmented skin lesions (melanomas and nevi) and apparently normal non-pigmented human skin, based on analyses of synchronous luminescence spectroscopy. measurements. Measurements were performed in the excitation range of 330-545 nm, with synchronous intervals varying from 30 120 nm. Normal skin, nevi, and melanomas differ in the way they fluoresce, and these differences are more distinct in the synchronous fluorescence spectra than in the conventional emission and excitation spectra. The differences in the fluorescence characteristics of pigmented and normal skin samples were ascribed to differences in concentrations of endogenous fluorophores and chromophores. Principal component and linear discriminant analysis of the synchronous spectra measured at different synchronous intervals showed that the greatest variance among the sample groups was at the 70 nm interval spectra. These spectra were then used to create partial least squares discriminant analysis-based classification models. Evaluation of the quality of these models from the receiver operating characteristic curves showed they performed well, with a maximum value of 1 for the area under the curve for melanoma detection. Hence, synchronous luminescence spectroscopy coupled with statistical methods may be advantageous in the early detection of skin cancer.
T2  - Applied Spectroscopy
T1  - Discrimination Among Melanoma, Nevi, and Normal Skin by Using Synchronous Luminescence Spectroscopy
VL  - 68
IS  - 8
SP  - 823
EP  - 830
DO  - 10.1366/13-07153
ER  - 

@article{
author = "Zeković, Ivana Lj. and Dramićanin, Tatjana and Lenhardt, Lea I. and Bandic, Jadran and Dramićanin, Miroslav",
year = "2014",
abstract = "Novel optical spectroscopy and imaging methods may be valuable in the early detection of cancer. This paper reports differences in the luminescence responses of pigmented skin lesions (melanomas and nevi) and apparently normal non-pigmented human skin, based on analyses of synchronous luminescence spectroscopy. measurements. Measurements were performed in the excitation range of 330-545 nm, with synchronous intervals varying from 30 120 nm. Normal skin, nevi, and melanomas differ in the way they fluoresce, and these differences are more distinct in the synchronous fluorescence spectra than in the conventional emission and excitation spectra. The differences in the fluorescence characteristics of pigmented and normal skin samples were ascribed to differences in concentrations of endogenous fluorophores and chromophores. Principal component and linear discriminant analysis of the synchronous spectra measured at different synchronous intervals showed that the greatest variance among the sample groups was at the 70 nm interval spectra. These spectra were then used to create partial least squares discriminant analysis-based classification models. Evaluation of the quality of these models from the receiver operating characteristic curves showed they performed well, with a maximum value of 1 for the area under the curve for melanoma detection. Hence, synchronous luminescence spectroscopy coupled with statistical methods may be advantageous in the early detection of skin cancer.",
journal = "Applied Spectroscopy",
title = "Discrimination Among Melanoma, Nevi, and Normal Skin by Using Synchronous Luminescence Spectroscopy",
volume = "68",
number = "8",
pages = "823-830",
doi = "10.1366/13-07153"
}

Zeković, I. Lj., Dramićanin, T., Lenhardt, L. I., Bandic, J.,& Dramićanin, M.. (2014). Discrimination Among Melanoma, Nevi, and Normal Skin by Using Synchronous Luminescence Spectroscopy. in Applied Spectroscopy, 68(8), 823-830.
https://doi.org/10.1366/13-07153

Zeković IL, Dramićanin T, Lenhardt LI, Bandic J, Dramićanin M. Discrimination Among Melanoma, Nevi, and Normal Skin by Using Synchronous Luminescence Spectroscopy. in Applied Spectroscopy. 2014;68(8):823-830.
doi:10.1366/13-07153 .

Zeković, Ivana Lj., Dramićanin, Tatjana, Lenhardt, Lea I., Bandic, Jadran, Dramićanin, Miroslav, "Discrimination Among Melanoma, Nevi, and Normal Skin by Using Synchronous Luminescence Spectroscopy" in Applied Spectroscopy, 68, no. 8 (2014):823-830,
https://doi.org/10.1366/13-07153 . .

TY  - JOUR
AU  - Lenhardt, Lea I.
AU  - Zeković, Ivana Lj.
AU  - Dramićanin, Tatjana
AU  - Tešić, Živoslav
AU  - Milojković-Opsenica, Dušanka M.
AU  - Dramićanin, Miroslav
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7065
AB  - In recent years, the potential of Fourier-transform infrared spectroscopy coupled with different chemometric tools in food analysis has been established. This technique is rapid, low cost, and reliable and requires little sample preparation. In this work, 130 Serbian unifloral honey samples (linden, acacia, and sunflower types) were analyzed using attenuated total reflectance infrared spectroscopy (ATR-IR). For each spectrum, 64 scans were recorded in wavenumbers between 4000 and 500 cm(-1) and at a spectral resolution of 4 cm(-1). These spectra were analyzed using principal component analysis (PCA), and calculated principal components were then used for support vector machine (SVM) training. In this way, the pattern-recognition tool is obtained for building a classification model for determining the botanical origin of honey. The PCA was used to analyze results and to see if the separation between groups of different types of honeys exists. Using the SVM, the classification model was built and classification errors were acquired. It has been observed that this technique is adequate for determining the botanical origin of honey with a success rate of 98.6%. Based on these results, it can be concluded that this technique offers many possibilities for future rapid qualitative analysis of honey.
T2  - Physica Scripta
T1  - Authentication of the botanical origin of unifloral honey by infrared spectroscopy coupled with support vector machine algorithm
VL  - T162
DO  - 10.1088/0031-8949/2014/T162/014042
ER  - 

@article{
author = "Lenhardt, Lea I. and Zeković, Ivana Lj. and Dramićanin, Tatjana and Tešić, Živoslav and Milojković-Opsenica, Dušanka M. and Dramićanin, Miroslav",
year = "2014",
abstract = "In recent years, the potential of Fourier-transform infrared spectroscopy coupled with different chemometric tools in food analysis has been established. This technique is rapid, low cost, and reliable and requires little sample preparation. In this work, 130 Serbian unifloral honey samples (linden, acacia, and sunflower types) were analyzed using attenuated total reflectance infrared spectroscopy (ATR-IR). For each spectrum, 64 scans were recorded in wavenumbers between 4000 and 500 cm(-1) and at a spectral resolution of 4 cm(-1). These spectra were analyzed using principal component analysis (PCA), and calculated principal components were then used for support vector machine (SVM) training. In this way, the pattern-recognition tool is obtained for building a classification model for determining the botanical origin of honey. The PCA was used to analyze results and to see if the separation between groups of different types of honeys exists. Using the SVM, the classification model was built and classification errors were acquired. It has been observed that this technique is adequate for determining the botanical origin of honey with a success rate of 98.6%. Based on these results, it can be concluded that this technique offers many possibilities for future rapid qualitative analysis of honey.",
journal = "Physica Scripta",
title = "Authentication of the botanical origin of unifloral honey by infrared spectroscopy coupled with support vector machine algorithm",
volume = "T162",
doi = "10.1088/0031-8949/2014/T162/014042"
}

Lenhardt, L. I., Zeković, I. Lj., Dramićanin, T., Tešić, Ž., Milojković-Opsenica, D. M.,& Dramićanin, M.. (2014). Authentication of the botanical origin of unifloral honey by infrared spectroscopy coupled with support vector machine algorithm. in Physica Scripta, T162.
https://doi.org/10.1088/0031-8949/2014/T162/014042

Lenhardt LI, Zeković IL, Dramićanin T, Tešić Ž, Milojković-Opsenica DM, Dramićanin M. Authentication of the botanical origin of unifloral honey by infrared spectroscopy coupled with support vector machine algorithm. in Physica Scripta. 2014;T162.
doi:10.1088/0031-8949/2014/T162/014042 .

Lenhardt, Lea I., Zeković, Ivana Lj., Dramićanin, Tatjana, Tešić, Živoslav, Milojković-Opsenica, Dušanka M., Dramićanin, Miroslav, "Authentication of the botanical origin of unifloral honey by infrared spectroscopy coupled with support vector machine algorithm" in Physica Scripta, T162 (2014),
https://doi.org/10.1088/0031-8949/2014/T162/014042 . .

TY  - THES
AU  - Zeković, Ivana Lj.
PY  - 2014
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=2642
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:10737/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=1024815026
UR  - http://nardus.mpn.gov.rs/123456789/5007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7277
AB  - Optiĉka spektroskopija i imidţing tehnike mogu biti korisne za ranu dijagnostiku kancera. U ovoj tezi, razlike u luminescentnim odgovorima pigmentnih lezija (melanoma i nevusa) i po svemu sudeći nepigmentne koţe ljudi su analizirane sinhronom luminescentnom spektroskopijom. Merenja su izvršena u opsegu eksitacione talasne duţine od 330 do 545 nm i sinhronom intervalu od 30 do 120 nm, da bi se dobili osnovni i trodimenzionalni sinhroni luminescentni spektri (3DTSLS) za svaki uzorak. Normalna koţa, nevus i melanom se razlikuju u naĉinu na koji fluoresciraju, i te razlike su više naglašene u sinhronim fluorescentnim spektrima nego u klasiĉnim emisionim i eksitacionim spektrima. Razlike u fluorescentnim karakteristikama pigmentnih lezija i zdrave koţe potiĉu od razliĉitih koncentracija endogenih fluorofora i hromofora. Analizom glavnih komponenata i linearnom diskriminantnom analizom sinhronih spektara izmerenih za razliĉite sinhrone intervale pokazano je da je najveća razlika izmeĊu grupa uzoraka dobijena za sinhroni interval 70 nm. Ovi spektri su zatim korišćeni za pravljenje klasifikacionih modela diskriminantnom analizom parcijalno najmanjih kvadrata. Testiranjem uspešnosti ovih modela krivom operativnih karakteristika pokazano je da su oni optimalni, sa maksimalnom vrednošću od jedan za površinu ispod krive operativnih karakteristika za detekciju melanoma. Za testiranje primenjivosti pomenutih tehnika korišćene su veštaĉke neuronske mreţe. U ovu svrhu, samoorganizujuće mape (SOM) i višeslojni perceptron (MLP) su obuĉene na osnovu luminescentnih podataka, a zatim je izvršeno grupisanje uzoraka tkiva. Pokazano je da su obe mreţe SOM i MLP dale dobre rezultate sa stopom uspešnosti klasifikacije uzoraka tkiva od 96% i 98%. Drugi deo eksperimentalnog rada u ovoj tezi se sastojao od merenja difuzno refleksionih spektara koţe volontera na dve regije tela, ĉelu i šaci, u cilju analize svojstava boje koţe na objektivan naĉin. Dobijeni spektri su analizirani korišćenjem analize glavnih komponenata (PCA) i L*a*b* sistema boja koji je preporuĉen od MeĊunarodne komisije za osvetljenje (CIE). Na osnovu rezultata analiza pokazano je da difuzno refleksiona spektroskopija uz korišćenje analize glavnihkomponenata i L*a*b* sistema boja predstavlja korisnu i objektivnu metodologiju za analiziranje karakteristika koţe.
AB  - Novel optical spectroscopy and imaging methods could be valuable in the early detection of cancer. Differences in the luminescence responses of pigmented skin lesions (melanomas and nevi) and apparently non-pigmented human skin were analyzed using synchronous luminescence spectroscopy in this thesis. Measurements were performed in the excitation range of 330-545 nm, with synchronous interval varyng from 30-120 nm to obtain ordinary and three-dimensional total synchronous luminescence spectra (3DTSLS) of each specimen. Normal skin, nevi and melanomas differ in the way they fluorescence, and these differences are more distinct in the syncronous fluorescence spectra than in the conventional emission and excitation spectra. The differences in the fluorescence characteristics of pigmented and normal skin samples were ascribed to differences in concentracions of endogenous fluorophores and chromophores. Principal component and linear discriminant analysis of the synchronous spectra measured at different synchronous intervals showed that the greatest variance among the sample groups was at the 70 nm interval spectra. These spectra were then used to create partial least squares discriminant analysis-based classification models. Evaluation of the quality of these models from the recevier operating characteristic curves showed they performed well, with a maximum value of one for the area under the curve for melanoma detection. To test applicability of the presented techniques artificial neural networks were used. For this purpose self organizing maps (SOM) and multi layer feed-forward neural network (MLP) were trained with luminescence data and then used for tissue specimen clustering. It was shown that both SOM and MLP gave promising results with 96 to 98% success tissue classification rate. Second part of experimental work in this thesis were measurements of diffuse reflectance spectra from skin sites located on a forehead and top of a hand of healthy volunteers in order to analyze skin color properties in an objective way. Obtained spectra were analyzed using principal component analysis (PCA) and standard Commission International d'Eclairage (CIE) L*a*b* color scheme. Based on results of analysis it was shown that diffuse reflectance spectroscopy combined with the PCA andthe L*a*b* color system is a convenient and objective methodology for analyzing skin properties.
PB  - Универзитет у Београду, Биолошки факултет
T2  - Универзитет у Београду
T1  - Komparativna analiza pigmentnih lezija i zdravog tkiva kože optičkim spektroskopskim metodama
T1  - Comparative analysis of pigmented skin lesions and normal skin using optical spectroscopic methods
UR  - https://hdl.handle.net/21.15107/rcub_nardus_5007
ER  - 

@phdthesis{
author = "Zeković, Ivana Lj.",
year = "2014",
abstract = "Optiĉka spektroskopija i imidţing tehnike mogu biti korisne za ranu dijagnostiku kancera. U ovoj tezi, razlike u luminescentnim odgovorima pigmentnih lezija (melanoma i nevusa) i po svemu sudeći nepigmentne koţe ljudi su analizirane sinhronom luminescentnom spektroskopijom. Merenja su izvršena u opsegu eksitacione talasne duţine od 330 do 545 nm i sinhronom intervalu od 30 do 120 nm, da bi se dobili osnovni i trodimenzionalni sinhroni luminescentni spektri (3DTSLS) za svaki uzorak. Normalna koţa, nevus i melanom se razlikuju u naĉinu na koji fluoresciraju, i te razlike su više naglašene u sinhronim fluorescentnim spektrima nego u klasiĉnim emisionim i eksitacionim spektrima. Razlike u fluorescentnim karakteristikama pigmentnih lezija i zdrave koţe potiĉu od razliĉitih koncentracija endogenih fluorofora i hromofora. Analizom glavnih komponenata i linearnom diskriminantnom analizom sinhronih spektara izmerenih za razliĉite sinhrone intervale pokazano je da je najveća razlika izmeĊu grupa uzoraka dobijena za sinhroni interval 70 nm. Ovi spektri su zatim korišćeni za pravljenje klasifikacionih modela diskriminantnom analizom parcijalno najmanjih kvadrata. Testiranjem uspešnosti ovih modela krivom operativnih karakteristika pokazano je da su oni optimalni, sa maksimalnom vrednošću od jedan za površinu ispod krive operativnih karakteristika za detekciju melanoma. Za testiranje primenjivosti pomenutih tehnika korišćene su veštaĉke neuronske mreţe. U ovu svrhu, samoorganizujuće mape (SOM) i višeslojni perceptron (MLP) su obuĉene na osnovu luminescentnih podataka, a zatim je izvršeno grupisanje uzoraka tkiva. Pokazano je da su obe mreţe SOM i MLP dale dobre rezultate sa stopom uspešnosti klasifikacije uzoraka tkiva od 96% i 98%. Drugi deo eksperimentalnog rada u ovoj tezi se sastojao od merenja difuzno refleksionih spektara koţe volontera na dve regije tela, ĉelu i šaci, u cilju analize svojstava boje koţe na objektivan naĉin. Dobijeni spektri su analizirani korišćenjem analize glavnih komponenata (PCA) i L*a*b* sistema boja koji je preporuĉen od MeĊunarodne komisije za osvetljenje (CIE). Na osnovu rezultata analiza pokazano je da difuzno refleksiona spektroskopija uz korišćenje analize glavnihkomponenata i L*a*b* sistema boja predstavlja korisnu i objektivnu metodologiju za analiziranje karakteristika koţe., Novel optical spectroscopy and imaging methods could be valuable in the early detection of cancer. Differences in the luminescence responses of pigmented skin lesions (melanomas and nevi) and apparently non-pigmented human skin were analyzed using synchronous luminescence spectroscopy in this thesis. Measurements were performed in the excitation range of 330-545 nm, with synchronous interval varyng from 30-120 nm to obtain ordinary and three-dimensional total synchronous luminescence spectra (3DTSLS) of each specimen. Normal skin, nevi and melanomas differ in the way they fluorescence, and these differences are more distinct in the syncronous fluorescence spectra than in the conventional emission and excitation spectra. The differences in the fluorescence characteristics of pigmented and normal skin samples were ascribed to differences in concentracions of endogenous fluorophores and chromophores. Principal component and linear discriminant analysis of the synchronous spectra measured at different synchronous intervals showed that the greatest variance among the sample groups was at the 70 nm interval spectra. These spectra were then used to create partial least squares discriminant analysis-based classification models. Evaluation of the quality of these models from the recevier operating characteristic curves showed they performed well, with a maximum value of one for the area under the curve for melanoma detection. To test applicability of the presented techniques artificial neural networks were used. For this purpose self organizing maps (SOM) and multi layer feed-forward neural network (MLP) were trained with luminescence data and then used for tissue specimen clustering. It was shown that both SOM and MLP gave promising results with 96 to 98% success tissue classification rate. Second part of experimental work in this thesis were measurements of diffuse reflectance spectra from skin sites located on a forehead and top of a hand of healthy volunteers in order to analyze skin color properties in an objective way. Obtained spectra were analyzed using principal component analysis (PCA) and standard Commission International d'Eclairage (CIE) L*a*b* color scheme. Based on results of analysis it was shown that diffuse reflectance spectroscopy combined with the PCA andthe L*a*b* color system is a convenient and objective methodology for analyzing skin properties.",
publisher = "Универзитет у Београду, Биолошки факултет",
journal = "Универзитет у Београду",
title = "Komparativna analiza pigmentnih lezija i zdravog tkiva kože optičkim spektroskopskim metodama, Comparative analysis of pigmented skin lesions and normal skin using optical spectroscopic methods",
url = "https://hdl.handle.net/21.15107/rcub_nardus_5007"
}

Zeković, I. Lj.. (2014). Komparativna analiza pigmentnih lezija i zdravog tkiva kože optičkim spektroskopskim metodama. in Универзитет у Београду
Универзитет у Београду, Биолошки факултет..
https://hdl.handle.net/21.15107/rcub_nardus_5007

Zeković IL. Komparativna analiza pigmentnih lezija i zdravog tkiva kože optičkim spektroskopskim metodama. in Универзитет у Београду. 2014;.
https://hdl.handle.net/21.15107/rcub_nardus_5007 .

Zeković, Ivana Lj., "Komparativna analiza pigmentnih lezija i zdravog tkiva kože optičkim spektroskopskim metodama" in Универзитет у Београду (2014),
https://hdl.handle.net/21.15107/rcub_nardus_5007 .