Ministry of Education, Science and Technological Development of the Republic of Serbia

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Ministry of Education, Science and Technological Development of the Republic of Serbia

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Publications

Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star

Borka, Duško; Borka Jovanović, Vesna; Capozziello, Salvatore; Zakharov, Alexander F.; Jovanović, Predrag

(2021)

TY  - JOUR
AU  - Borka, Duško
AU  - Borka Jovanović, Vesna
AU  - Capozziello, Salvatore
AU  - Zakharov, Alexander F.
AU  - Jovanović, Predrag
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9981
AB  - After giving a short overview of previous results on constraining of Extended Gravity by stellar orbits, we discuss the Schwarzschild orbital precession of S2 star assuming the congruence with predictions of General Relativity (GR). At the moment, the S2 star trajectory is remarkably fitted with the first post-Newtonian approximation of GR. In particular, both Keck and VLT (GRAVITY) teams declared that the gravitational redshift near its pericenter passage for the S2 star orbit corresponds to theoretical estimates found with the first post-Newtonian (pN) approximation. In 2020, the GRAVITY Collaboration detected the orbital precession of the S2 star around the supermassive black hole (SMBH) at the Galactic Center and showed that it is close to the GR prediction. Based on this observational fact, we evaluated parameters of the Extended Gravity theories with the Schwarzschild precession of the S2 star. Using the mentioned method, we estimate the orbital precession angles for some Extended Gravity models including power-law f(R), general Yukawa-like corrections, scalar–tensor gravity, and non-local gravity theories formulated in both metric and Palatini formalism. In this consideration, we assume that a gravitational field is spherically symmetric, therefore, alternative theories of gravity could be described only with a few parameters. Specifically, considering the orbital precession, we estimate the range of parameters of these Extended Gravity models for which the orbital precession is like in GR. Then we compare these results with our previous results, which were obtained by fitting the simulated orbits of S2 star to its observed astrometric positions. In case of power-law f(R), generic Yukawa-like correction, scalar–tensor gravity and non-local gravity theories, we were able to obtain a prograde orbital precession, like in GR. According to these results, the method is a useful tool to evaluate parameters of the gravitational potential at the Galactic Center.
T2  - Universe
T1  - Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star
VL  - 7
IS  - 11
SP  - 407
DO  - 10.3390/universe7110407
ER  - 
@article{
author = "Borka, Duško and Borka Jovanović, Vesna and Capozziello, Salvatore and Zakharov, Alexander F. and Jovanović, Predrag",
year = "2021",
abstract = "After giving a short overview of previous results on constraining of Extended Gravity by stellar orbits, we discuss the Schwarzschild orbital precession of S2 star assuming the congruence with predictions of General Relativity (GR). At the moment, the S2 star trajectory is remarkably fitted with the first post-Newtonian approximation of GR. In particular, both Keck and VLT (GRAVITY) teams declared that the gravitational redshift near its pericenter passage for the S2 star orbit corresponds to theoretical estimates found with the first post-Newtonian (pN) approximation. In 2020, the GRAVITY Collaboration detected the orbital precession of the S2 star around the supermassive black hole (SMBH) at the Galactic Center and showed that it is close to the GR prediction. Based on this observational fact, we evaluated parameters of the Extended Gravity theories with the Schwarzschild precession of the S2 star. Using the mentioned method, we estimate the orbital precession angles for some Extended Gravity models including power-law f(R), general Yukawa-like corrections, scalar–tensor gravity, and non-local gravity theories formulated in both metric and Palatini formalism. In this consideration, we assume that a gravitational field is spherically symmetric, therefore, alternative theories of gravity could be described only with a few parameters. Specifically, considering the orbital precession, we estimate the range of parameters of these Extended Gravity models for which the orbital precession is like in GR. Then we compare these results with our previous results, which were obtained by fitting the simulated orbits of S2 star to its observed astrometric positions. In case of power-law f(R), generic Yukawa-like correction, scalar–tensor gravity and non-local gravity theories, we were able to obtain a prograde orbital precession, like in GR. According to these results, the method is a useful tool to evaluate parameters of the gravitational potential at the Galactic Center.",
journal = "Universe",
title = "Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star",
volume = "7",
number = "11",
pages = "407",
doi = "10.3390/universe7110407"
}
Borka, D., Borka Jovanović, V., Capozziello, S., Zakharov, A. F.,& Jovanović, P.. (2021). Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star. in Universe, 7(11), 407.
https://doi.org/10.3390/universe7110407
Borka D, Borka Jovanović V, Capozziello S, Zakharov AF, Jovanović P. Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star. in Universe. 2021;7(11):407.
doi:10.3390/universe7110407 .
Borka, Duško, Borka Jovanović, Vesna, Capozziello, Salvatore, Zakharov, Alexander F., Jovanović, Predrag, "Estimating the Parameters of Extended Gravity Theories with the Schwarzschild Precession of S2 Star" in Universe, 7, no. 11 (2021):407,
https://doi.org/10.3390/universe7110407 . .
8

Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions

Zagorac, Jelena B.; Zagorac, Dejan; Jovanović, Dušica; Pejić, Milan; Škundrić, Tamara; Matović, Branko

(2021)

TY  - JOUR
AU  - Zagorac, Jelena B.
AU  - Zagorac, Dejan
AU  - Jovanović, Dušica
AU  - Pejić, Milan
AU  - Škundrić, Tamara
AU  - Matović, Branko
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9969
AB  - Recently predicted α-phase in the Ce2ON2 compound has been further investigated using ab initio methods. The structural properties of the α-Ce2ON2 have been investigated and compared with the related AlCo2Pr2 structure. Mechanical properties including elastic constants, bulk, shear and elastic moduli, Poisson's ratio, Pugh’s criterion, and hardness are calculated in the pressure range from 0 to 10 GPa. Also, electronic properties are calculated at the same pressure conditions using DFT-LDA approximation and the characteristic band structure has been analyzed.
T2  - Journal of Innovative Materials in Extreme Conditions
T1  - Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions
VL  - 2
IS  - 2
SP  - 36
EP  - 43
ER  - 
@article{
author = "Zagorac, Jelena B. and Zagorac, Dejan and Jovanović, Dušica and Pejić, Milan and Škundrić, Tamara and Matović, Branko",
year = "2021",
abstract = "Recently predicted α-phase in the Ce2ON2 compound has been further investigated using ab initio methods. The structural properties of the α-Ce2ON2 have been investigated and compared with the related AlCo2Pr2 structure. Mechanical properties including elastic constants, bulk, shear and elastic moduli, Poisson's ratio, Pugh’s criterion, and hardness are calculated in the pressure range from 0 to 10 GPa. Also, electronic properties are calculated at the same pressure conditions using DFT-LDA approximation and the characteristic band structure has been analyzed.",
journal = "Journal of Innovative Materials in Extreme Conditions",
title = "Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions",
volume = "2",
number = "2",
pages = "36-43"
}
Zagorac, J. B., Zagorac, D., Jovanović, D., Pejić, M., Škundrić, T.,& Matović, B.. (2021). Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions. in Journal of Innovative Materials in Extreme Conditions, 2(2), 36-43.
Zagorac JB, Zagorac D, Jovanović D, Pejić M, Škundrić T, Matović B. Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions. in Journal of Innovative Materials in Extreme Conditions. 2021;2(2):36-43..
Zagorac, Jelena B., Zagorac, Dejan, Jovanović, Dušica, Pejić, Milan, Škundrić, Tamara, Matović, Branko, "Ab Initio Investigations and Behaviour of the α-Ce2ON2 Phase in the Extreme Pressure Conditions" in Journal of Innovative Materials in Extreme Conditions, 2, no. 2 (2021):36-43.

Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena

Dimović, Slavko ; Jelić, Ivana V.; Šljivić-Ivanović, Marija

(2021)

TY  - JOUR
AU  - Dimović, Slavko 
AU  - Jelić, Ivana V.
AU  - Šljivić-Ivanović, Marija 
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9951
AB  - The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment of the washing rate as a function of time. The higher value of cement matrix mechanical resistance corresponds to a lower value of Co2+ and Cs+ ions leaching. The Co2+ leaching level was more than two orders of magnitude less than the leaching level of Cs+. The influence of bentonite and zeolite on Co2+ leaching reduction was significantly smaller in comparison with Cs+, while zeolite had a higher Cs+ and Co2+ sorption ability than bentonite. Under static leaching conditions, the contribution of diffusion to the total transport of ions in the matrix porous medium was dominant. The contribution of matrix dissolution was insignificant concerning the dominant contribution of diffusion and surface washing. The semi-empirical model showed a better approximation of the Co2+ and Cs+ ions laboratory leaching process.
T2  - Nuclear Technology and Radiation Protection
T1  - Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena
VL  - 36
IS  - 1
SP  - 60
EP  - 65
DO  - 10.2298/NTRP201130003D
ER  - 
@article{
author = "Dimović, Slavko  and Jelić, Ivana V. and Šljivić-Ivanović, Marija ",
year = "2021",
abstract = "The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment of the washing rate as a function of time. The higher value of cement matrix mechanical resistance corresponds to a lower value of Co2+ and Cs+ ions leaching. The Co2+ leaching level was more than two orders of magnitude less than the leaching level of Cs+. The influence of bentonite and zeolite on Co2+ leaching reduction was significantly smaller in comparison with Cs+, while zeolite had a higher Cs+ and Co2+ sorption ability than bentonite. Under static leaching conditions, the contribution of diffusion to the total transport of ions in the matrix porous medium was dominant. The contribution of matrix dissolution was insignificant concerning the dominant contribution of diffusion and surface washing. The semi-empirical model showed a better approximation of the Co2+ and Cs+ ions laboratory leaching process.",
journal = "Nuclear Technology and Radiation Protection",
title = "Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena",
volume = "36",
number = "1",
pages = "60-65",
doi = "10.2298/NTRP201130003D"
}
Dimović, S., Jelić, I. V.,& Šljivić-Ivanović, M.. (2021). Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena. in Nuclear Technology and Radiation Protection, 36(1), 60-65.
https://doi.org/10.2298/NTRP201130003D
Dimović S, Jelić IV, Šljivić-Ivanović M. Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena. in Nuclear Technology and Radiation Protection. 2021;36(1):60-65.
doi:10.2298/NTRP201130003D .
Dimović, Slavko , Jelić, Ivana V., Šljivić-Ivanović, Marija , "Influence of bentonite and zeolite on Cs+ and Co2+ cement matrix leaching phenomena" in Nuclear Technology and Radiation Protection, 36, no. 1 (2021):60-65,
https://doi.org/10.2298/NTRP201130003D . .
1

Alkali activation of different type of ash as a production of combustion process

Nenadović, Miloš ; Ferone, Claudio; Kljajević, Ljiljana ; Mirković, Miljana ; Todorović, Bratislav ; Vukanac, Ivana ; Nenadović, Snežana S.

(2021)

TY  - JOUR
AU  - Nenadović, Miloš 
AU  - Ferone, Claudio
AU  - Kljajević, Ljiljana 
AU  - Mirković, Miljana 
AU  - Todorović, Bratislav 
AU  - Vukanac, Ivana 
AU  - Nenadović, Snežana S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9950
AB  - Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.
T2  - Nuclear Technology and Radiation Protection
T1  - Alkali activation of different type of ash as a production of combustion process
VL  - 36
IS  - 1
SP  - 66
EP  - 73
DO  - 10.2298/NTRP201120006N
ER  - 
@article{
author = "Nenadović, Miloš  and Ferone, Claudio and Kljajević, Ljiljana  and Mirković, Miljana  and Todorović, Bratislav  and Vukanac, Ivana  and Nenadović, Snežana S.",
year = "2021",
abstract = "Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.",
journal = "Nuclear Technology and Radiation Protection",
title = "Alkali activation of different type of ash as a production of combustion process",
volume = "36",
number = "1",
pages = "66-73",
doi = "10.2298/NTRP201120006N"
}
Nenadović, M., Ferone, C., Kljajević, L., Mirković, M., Todorović, B., Vukanac, I.,& Nenadović, S. S.. (2021). Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection, 36(1), 66-73.
https://doi.org/10.2298/NTRP201120006N
Nenadović M, Ferone C, Kljajević L, Mirković M, Todorović B, Vukanac I, Nenadović SS. Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection. 2021;36(1):66-73.
doi:10.2298/NTRP201120006N .
Nenadović, Miloš , Ferone, Claudio, Kljajević, Ljiljana , Mirković, Miljana , Todorović, Bratislav , Vukanac, Ivana , Nenadović, Snežana S., "Alkali activation of different type of ash as a production of combustion process" in Nuclear Technology and Radiation Protection, 36, no. 1 (2021):66-73,
https://doi.org/10.2298/NTRP201120006N . .
1

Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence

Ćirić, Aleksandar; Stojadinović, Stevan; Ristić, Zoran; Zeković, Ivana Lj.; Kuzman, Sanja; Antić, Željka; Dramićanin, Miroslav

(2021)

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 . .
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Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals

Trejgis, Karolina; Dramićanin, Miroslav; Marciniak, Lukasz

(2021)

TY  - JOUR
AU  - Trejgis, Karolina
AU  - Dramićanin, Miroslav
AU  - Marciniak, Lukasz
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9796
AB  - The constant striving to improve the quality of thermal imaging with the use of luminescent thermometers imposes the search for new materials with better and better thermometric properties. The facility in the modulation of the spectroscopic properties of transition metal doped materials makes them particularly attractive for this type of application. Therefore, in response to this expectation, in this manuscript we report the novel SrTiO3:Mn4+ nanocrystals as a thermographic phosphor of extraordinary thermometric properties in the biologically relevant temperatures. The high relative sensitivity of the SrTiO3:Mn4+ nanocrystals to temperature changes in each of the three temperature readout modes presented in this manuscript, namely 8.67%/K at 313 K in the intensity mode, 3.5%/K at 348 K in the lifetime mode and 5.64%/K at 303 K in the ratiometric mode, make this material one of the most promising candidates for highly sensitive temperature imaging. © 2021 Elsevier B.V.
T2  - Journal of Alloys and Compounds
T1  - Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals
VL  - 875
DO  - 10.1016/j.jallcom.2021.159973
ER  - 
@article{
author = "Trejgis, Karolina and Dramićanin, Miroslav and Marciniak, Lukasz",
year = "2021",
abstract = "The constant striving to improve the quality of thermal imaging with the use of luminescent thermometers imposes the search for new materials with better and better thermometric properties. The facility in the modulation of the spectroscopic properties of transition metal doped materials makes them particularly attractive for this type of application. Therefore, in response to this expectation, in this manuscript we report the novel SrTiO3:Mn4+ nanocrystals as a thermographic phosphor of extraordinary thermometric properties in the biologically relevant temperatures. The high relative sensitivity of the SrTiO3:Mn4+ nanocrystals to temperature changes in each of the three temperature readout modes presented in this manuscript, namely 8.67%/K at 313 K in the intensity mode, 3.5%/K at 348 K in the lifetime mode and 5.64%/K at 303 K in the ratiometric mode, make this material one of the most promising candidates for highly sensitive temperature imaging. © 2021 Elsevier B.V.",
journal = "Journal of Alloys and Compounds",
title = "Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals",
volume = "875",
doi = "10.1016/j.jallcom.2021.159973"
}
Trejgis, K., Dramićanin, M.,& Marciniak, L.. (2021). Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals. in Journal of Alloys and Compounds, 875.
https://doi.org/10.1016/j.jallcom.2021.159973
Trejgis K, Dramićanin M, Marciniak L. Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals. in Journal of Alloys and Compounds. 2021;875.
doi:10.1016/j.jallcom.2021.159973 .
Trejgis, Karolina, Dramićanin, Miroslav, Marciniak, Lukasz, "Highly sensitive multiparametric luminescent thermometer for biologically-relevant temperatures based on Mn4+, Ln3+ co-doped SrTiO3 nanocrystals" in Journal of Alloys and Compounds, 875 (2021),
https://doi.org/10.1016/j.jallcom.2021.159973 . .
1
4
3
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All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles

Periša, Jovana; Ristić, Zoran; Piotrowski, Wojciech; Antić, Željka ; Marciniak, Lukasz; Dramićanin, Miroslav

(2021)

TY  - JOUR
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Piotrowski, Wojciech
AU  - Antić, Željka 
AU  - Marciniak, Lukasz
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9804
AB  - This paper presents four new temperature readout approaches to luminescence nanothermometry in spectral regions of biological transparency demonstrated on Yb3+/Er3+-doped yttrium aluminum garnet nanoparticles. Under the 10 638 cm-1 excitation, down-shifting near infrared emissions (>10 000 cm-1) are identified as those originating from Yb3+ ions' 2F5/2 → 2F7/2 (∼9709 cm-1) and Er3+ ions' 4I13/2 → 4I15/2 (∼6494 cm-1) electronic transitions and used for 4 conceptually different luminescence thermometry approaches. Observed variations in luminescence parameters with temperature offered an exceptional base for studying multiparametric temperature readouts. These include the temperature-dependence of: (i) intensity ratio between emissions from Stark components of Er3+ 4I13/2 level; (ii) intensity ratio between emissions of Yb3+ (2F5/2 → 2F7/2 transition) and Er3+ (4I13/2 → 4I15/2 transition); (iii) band shift and bandwidth and (iv) lifetime of the Yb3+ emission (2F5/2 → 2F7/2 transition) with maximal sensitivities of 1% K-1, 0.8% K-1, 0.09 cm-1 K-1, 0.46% K-1 and 0.86% K-1, respectively. The multimodal temperature readout provided by this material enables its application in different luminescence thermometry setups as well as improved the reliability of the temperature sensing by the cross-validation between measurements. © 2021 The Royal Society of Chemistry.
T2  - RSC Advances
T1  - All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles
VL  - 11
IS  - 26
SP  - 15933
EP  - 15942
DO  - 10.1039/d1ra01647d
ER  - 
@article{
author = "Periša, Jovana and Ristić, Zoran and Piotrowski, Wojciech and Antić, Željka  and Marciniak, Lukasz and Dramićanin, Miroslav",
year = "2021",
abstract = "This paper presents four new temperature readout approaches to luminescence nanothermometry in spectral regions of biological transparency demonstrated on Yb3+/Er3+-doped yttrium aluminum garnet nanoparticles. Under the 10 638 cm-1 excitation, down-shifting near infrared emissions (>10 000 cm-1) are identified as those originating from Yb3+ ions' 2F5/2 → 2F7/2 (∼9709 cm-1) and Er3+ ions' 4I13/2 → 4I15/2 (∼6494 cm-1) electronic transitions and used for 4 conceptually different luminescence thermometry approaches. Observed variations in luminescence parameters with temperature offered an exceptional base for studying multiparametric temperature readouts. These include the temperature-dependence of: (i) intensity ratio between emissions from Stark components of Er3+ 4I13/2 level; (ii) intensity ratio between emissions of Yb3+ (2F5/2 → 2F7/2 transition) and Er3+ (4I13/2 → 4I15/2 transition); (iii) band shift and bandwidth and (iv) lifetime of the Yb3+ emission (2F5/2 → 2F7/2 transition) with maximal sensitivities of 1% K-1, 0.8% K-1, 0.09 cm-1 K-1, 0.46% K-1 and 0.86% K-1, respectively. The multimodal temperature readout provided by this material enables its application in different luminescence thermometry setups as well as improved the reliability of the temperature sensing by the cross-validation between measurements. © 2021 The Royal Society of Chemistry.",
journal = "RSC Advances",
title = "All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles",
volume = "11",
number = "26",
pages = "15933-15942",
doi = "10.1039/d1ra01647d"
}
Periša, J., Ristić, Z., Piotrowski, W., Antić, Ž., Marciniak, L.,& Dramićanin, M.. (2021). All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles. in RSC Advances, 11(26), 15933-15942.
https://doi.org/10.1039/d1ra01647d
Periša J, Ristić Z, Piotrowski W, Antić Ž, Marciniak L, Dramićanin M. All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles. in RSC Advances. 2021;11(26):15933-15942.
doi:10.1039/d1ra01647d .
Periša, Jovana, Ristić, Zoran, Piotrowski, Wojciech, Antić, Željka , Marciniak, Lukasz, Dramićanin, Miroslav, "All near-infrared multiparametric luminescence thermometry using Er3+, Yb3+-doped YAG nanoparticles" in RSC Advances, 11, no. 26 (2021):15933-15942,
https://doi.org/10.1039/d1ra01647d . .
2
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2
2

Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2

Rodríguez-García, Melissa M.; Ćirić, Aleksandar; Ristić, Zoran; Williams, J. A. Gareth; Dramićanin, Miroslav; Radosavjević Evans, Ivana

(2021)

TY  - JOUR
AU  - Rodríguez-García, Melissa M.
AU  - Ćirić, Aleksandar
AU  - Ristić, Zoran
AU  - Williams, J. A. Gareth
AU  - Dramićanin, Miroslav
AU  - Radosavjević Evans, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9846
AB  - A series of new red phosphors based on apatite-type gadolinium silicate host, Gd9.33−xEux(SiO4)6O2 (0.03 < x < 1.87), have been synthesised and analysed. The phosphors show excellent chemical and thermal stability, losing only 10% of their emission intensity at 150 °C (working LED temperature) relative to that at room temperature through the electric dipole–dipole interaction. They exhibit efficient Eu3+ narrow-band red emission (quantum yield up to 75%; full-width at half-maximum (FWHM) = 7 nm; CIE colour coordinates x = 0.65, y = 0.35) of exceptional colour purity (94.2%), and the host can be heavily doped with Eu3+ (up to 10 at%) without concentration quenching of the emission. Variable-temperature powder X-ray diffraction, photoluminescence spectroscopy and Judd–Ofelt analysis of the phosphors’ radiative properties reveal the favourable influence of the structural properties of the apatite-type host on the efficiency and thermal stability of the Eu3+-activated Gd9.33(SiO4)6O2 emission.
T2  - Journal of Materials Chemistry C
T1  - Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2
VL  - 9
IS  - 23
SP  - 7474
EP  - 7484
DO  - 10.1039/D1TC01330K
ER  - 
@article{
author = "Rodríguez-García, Melissa M. and Ćirić, Aleksandar and Ristić, Zoran and Williams, J. A. Gareth and Dramićanin, Miroslav and Radosavjević Evans, Ivana",
year = "2021",
abstract = "A series of new red phosphors based on apatite-type gadolinium silicate host, Gd9.33−xEux(SiO4)6O2 (0.03 < x < 1.87), have been synthesised and analysed. The phosphors show excellent chemical and thermal stability, losing only 10% of their emission intensity at 150 °C (working LED temperature) relative to that at room temperature through the electric dipole–dipole interaction. They exhibit efficient Eu3+ narrow-band red emission (quantum yield up to 75%; full-width at half-maximum (FWHM) = 7 nm; CIE colour coordinates x = 0.65, y = 0.35) of exceptional colour purity (94.2%), and the host can be heavily doped with Eu3+ (up to 10 at%) without concentration quenching of the emission. Variable-temperature powder X-ray diffraction, photoluminescence spectroscopy and Judd–Ofelt analysis of the phosphors’ radiative properties reveal the favourable influence of the structural properties of the apatite-type host on the efficiency and thermal stability of the Eu3+-activated Gd9.33(SiO4)6O2 emission.",
journal = "Journal of Materials Chemistry C",
title = "Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2",
volume = "9",
number = "23",
pages = "7474-7484",
doi = "10.1039/D1TC01330K"
}
Rodríguez-García, M. M., Ćirić, A., Ristić, Z., Williams, J. A. G., Dramićanin, M.,& Radosavjević Evans, I.. (2021). Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2. in Journal of Materials Chemistry C, 9(23), 7474-7484.
https://doi.org/10.1039/D1TC01330K
Rodríguez-García MM, Ćirić A, Ristić Z, Williams JAG, Dramićanin M, Radosavjević Evans I. Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2. in Journal of Materials Chemistry C. 2021;9(23):7474-7484.
doi:10.1039/D1TC01330K .
Rodríguez-García, Melissa M., Ćirić, Aleksandar, Ristić, Zoran, Williams, J. A. Gareth, Dramićanin, Miroslav, Radosavjević Evans, Ivana, "Narrow-band red phosphors of high colour purity based on Eu3+-activated apatite-type Gd9.33(SiO4)6O2" in Journal of Materials Chemistry C, 9, no. 23 (2021):7474-7484,
https://doi.org/10.1039/D1TC01330K . .
2
1

MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range

Ćirić, Aleksandar; Ristić, Zoran; Periša, Jovana; Antić, Željka; Dramićanin, Miroslav

(2021)

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Ristić, Zoran
AU  - Periša, Jovana
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9851
AB  - Temperature sensing from the photoluminescence of MgAl2O4:Cr3+ ceramic powder is systematically investigated. Material was prepared by self-propagating high temperature synthesis method. In this host, Cr3+ experiences the strong crystal field, so the overlapping emissions from 2E and 4T2 energy levels are observed. Emission and excitation spectra were recorded from 300 K to 540 K. The broad photoluminescence attributed to 4T2→4A2 emission gains in intensity with increase in temperature on account of 2E→4A2 emission intensity until 460 K when both emissions start quenching. The emissions were separated by deconvolution at each temperature and used for the luminescence intensity ratio temperature readout method. The obtained relative sensitivity exhibited high values in the physiological range, from 3.5 %K−1 at 300 K to 2.9 %K−1 at 330 K, above 2 %K−1 below 400 K and above 1 %K−1 between 400 K and 540 K.
T2  - Ceramics International
T1  - MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range
VL  - 47
IS  - 19
SP  - 27151
EP  - 27156
DO  - 10.1016/j.ceramint.2021.06.131
ER  - 
@article{
author = "Ćirić, Aleksandar and Ristić, Zoran and Periša, Jovana and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "Temperature sensing from the photoluminescence of MgAl2O4:Cr3+ ceramic powder is systematically investigated. Material was prepared by self-propagating high temperature synthesis method. In this host, Cr3+ experiences the strong crystal field, so the overlapping emissions from 2E and 4T2 energy levels are observed. Emission and excitation spectra were recorded from 300 K to 540 K. The broad photoluminescence attributed to 4T2→4A2 emission gains in intensity with increase in temperature on account of 2E→4A2 emission intensity until 460 K when both emissions start quenching. The emissions were separated by deconvolution at each temperature and used for the luminescence intensity ratio temperature readout method. The obtained relative sensitivity exhibited high values in the physiological range, from 3.5 %K−1 at 300 K to 2.9 %K−1 at 330 K, above 2 %K−1 below 400 K and above 1 %K−1 between 400 K and 540 K.",
journal = "Ceramics International",
title = "MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range",
volume = "47",
number = "19",
pages = "27151-27156",
doi = "10.1016/j.ceramint.2021.06.131"
}
Ćirić, A., Ristić, Z., Periša, J., Antić, Ž.,& Dramićanin, M.. (2021). MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range. in Ceramics International, 47(19), 27151-27156.
https://doi.org/10.1016/j.ceramint.2021.06.131
Ćirić A, Ristić Z, Periša J, Antić Ž, Dramićanin M. MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range. in Ceramics International. 2021;47(19):27151-27156.
doi:10.1016/j.ceramint.2021.06.131 .
Ćirić, Aleksandar, Ristić, Zoran, Periša, Jovana, Antić, Željka, Dramićanin, Miroslav, "MgAl2O4:Cr3+ luminescence thermometry probe in the physiological temperatures range" in Ceramics International, 47, no. 19 (2021):27151-27156,
https://doi.org/10.1016/j.ceramint.2021.06.131 . .
1
2
3

Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG

Periša, Jovana; Ristić, Zoran; Đorđević, Vesna R.; Sekulić, Milica; Dramićanin, Tatjana; Antić, Željka; Dramićanin, Miroslav

(2021)

TY  - JOUR
AU  - Periša, Jovana
AU  - Ristić, Zoran
AU  - Đorđević, Vesna R.
AU  - Sekulić, Milica
AU  - Dramićanin, Tatjana
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9859
AB  - The multiparametric luminescence thermometry with Dy3+, Cr3+ double activated yttrium aluminium garnet – YAG is demonstrated. Phospors were synthesized via Pechini method and their structure is confirmed by X-ray diffraction analysis. Mean crystallite size of powders was calculated to be ~22 nm. Morphology was investigated using scanning electron microscopy showing combination of dense, different size chunks constituted of spherical particles bellow 50 nm in size. Photoluminescence emission spectra of the Dy3+, Cr3+ double activated YAG consist of blue and yellow Dy3+ emissions and the broad, deep red Cr3+ emission. The decrease in the Dy3+ emission intensity with the increase in the Cr3+ content indicates the efficient energy transfer from Dy3+ to Cr3+ of ~90%. Temperature-dependant photoluminescence emission measurements are performed under 484 nm and 582 nm excitation in the steady-state domain and in the 175 K–650 K temperature range. The noted alterations of luminescence with temperature present an excellent base for studying the multiparametric temperature readouts. The luminescence intensity ratio, the most frequently exploited luminescent thermometry temperature readout method, was tested using: i) the combination of Dy3+ and Cr3+ emissions, ii) using the double excitation approach, and iii) using Cr3+ emission only, with relative sensitivities of 0.64 %K−1 at 175 K, 0.96 %K−1 at 200 K and 2.2 %K−1 at 200 K, respectively.
T2  - Journal of Luminescence
T1  - Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG
VL  - 238
SP  - 118306
DO  - 10.1016/j.jlumin.2021.118306
ER  - 
@article{
author = "Periša, Jovana and Ristić, Zoran and Đorđević, Vesna R. and Sekulić, Milica and Dramićanin, Tatjana and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "The multiparametric luminescence thermometry with Dy3+, Cr3+ double activated yttrium aluminium garnet – YAG is demonstrated. Phospors were synthesized via Pechini method and their structure is confirmed by X-ray diffraction analysis. Mean crystallite size of powders was calculated to be ~22 nm. Morphology was investigated using scanning electron microscopy showing combination of dense, different size chunks constituted of spherical particles bellow 50 nm in size. Photoluminescence emission spectra of the Dy3+, Cr3+ double activated YAG consist of blue and yellow Dy3+ emissions and the broad, deep red Cr3+ emission. The decrease in the Dy3+ emission intensity with the increase in the Cr3+ content indicates the efficient energy transfer from Dy3+ to Cr3+ of ~90%. Temperature-dependant photoluminescence emission measurements are performed under 484 nm and 582 nm excitation in the steady-state domain and in the 175 K–650 K temperature range. The noted alterations of luminescence with temperature present an excellent base for studying the multiparametric temperature readouts. The luminescence intensity ratio, the most frequently exploited luminescent thermometry temperature readout method, was tested using: i) the combination of Dy3+ and Cr3+ emissions, ii) using the double excitation approach, and iii) using Cr3+ emission only, with relative sensitivities of 0.64 %K−1 at 175 K, 0.96 %K−1 at 200 K and 2.2 %K−1 at 200 K, respectively.",
journal = "Journal of Luminescence",
title = "Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG",
volume = "238",
pages = "118306",
doi = "10.1016/j.jlumin.2021.118306"
}
Periša, J., Ristić, Z., Đorđević, V. R., Sekulić, M., Dramićanin, T., Antić, Ž.,& Dramićanin, M.. (2021). Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG. in Journal of Luminescence, 238, 118306.
https://doi.org/10.1016/j.jlumin.2021.118306
Periša J, Ristić Z, Đorđević VR, Sekulić M, Dramićanin T, Antić Ž, Dramićanin M. Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG. in Journal of Luminescence. 2021;238:118306.
doi:10.1016/j.jlumin.2021.118306 .
Periša, Jovana, Ristić, Zoran, Đorđević, Vesna R., Sekulić, Milica, Dramićanin, Tatjana, Antić, Željka, Dramićanin, Miroslav, "Multiparametric luminescence thermometry from Dy3+, Cr3+ double activated YAG" in Journal of Luminescence, 238 (2021):118306,
https://doi.org/10.1016/j.jlumin.2021.118306 . .
1
2
2

Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study

Dragojlović, Milijana; Milanović, Igor; Gradišek, Anton; Kurko, Sandra V.; Mitrić, Miodrag; Umićević, Ana; Radaković, Jana; Batalović, Katarina

(2021)

TY  - JOUR
AU  - Dragojlović, Milijana
AU  - Milanović, Igor
AU  - Gradišek, Anton
AU  - Kurko, Sandra V.
AU  - Mitrić, Miodrag
AU  - Umićević, Ana
AU  - Radaković, Jana
AU  - Batalović, Katarina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9087
AB  - LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study
VL  - 46
IS  - 24
SP  - 13070
EP  - 13081
DO  - 10.1016/j.ijhydene.2021.01.086
ER  - 
@article{
author = "Dragojlović, Milijana and Milanović, Igor and Gradišek, Anton and Kurko, Sandra V. and Mitrić, Miodrag and Umićević, Ana and Radaković, Jana and Batalović, Katarina",
year = "2021",
abstract = "LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study",
volume = "46",
number = "24",
pages = "13070-13081",
doi = "10.1016/j.ijhydene.2021.01.086"
}
Dragojlović, M., Milanović, I., Gradišek, A., Kurko, S. V., Mitrić, M., Umićević, A., Radaković, J.,& Batalović, K.. (2021). Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy, 46(24), 13070-13081.
https://doi.org/10.1016/j.ijhydene.2021.01.086
Dragojlović M, Milanović I, Gradišek A, Kurko SV, Mitrić M, Umićević A, Radaković J, Batalović K. Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy. 2021;46(24):13070-13081.
doi:10.1016/j.ijhydene.2021.01.086 .
Dragojlović, Milijana, Milanović, Igor, Gradišek, Anton, Kurko, Sandra V., Mitrić, Miodrag, Umićević, Ana, Radaković, Jana, Batalović, Katarina, "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study" in International Journal of Hydrogen Energy, 46, no. 24 (2021):13070-13081,
https://doi.org/10.1016/j.ijhydene.2021.01.086 . .

Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study

Dragojlović, Milijana; Milanović, Igor; Gradišek, Anton; Kurko, Sandra V.; Mitrić, Miodrag; Umićević, Ana; Radaković, Jana; Batalović, Katarina

(2021)

TY  - JOUR
AU  - Dragojlović, Milijana
AU  - Milanović, Igor
AU  - Gradišek, Anton
AU  - Kurko, Sandra V.
AU  - Mitrić, Miodrag
AU  - Umićević, Ana
AU  - Radaković, Jana
AU  - Batalović, Katarina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9091
AB  - LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study
VL  - 46
IS  - 24
SP  - 13070
EP  - 13081
DO  - 10.1016/j.ijhydene.2021.01.086
ER  - 
@article{
author = "Dragojlović, Milijana and Milanović, Igor and Gradišek, Anton and Kurko, Sandra V. and Mitrić, Miodrag and Umićević, Ana and Radaković, Jana and Batalović, Katarina",
year = "2021",
abstract = "LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study",
volume = "46",
number = "24",
pages = "13070-13081",
doi = "10.1016/j.ijhydene.2021.01.086"
}
Dragojlović, M., Milanović, I., Gradišek, A., Kurko, S. V., Mitrić, M., Umićević, A., Radaković, J.,& Batalović, K.. (2021). Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy, 46(24), 13070-13081.
https://doi.org/10.1016/j.ijhydene.2021.01.086
Dragojlović M, Milanović I, Gradišek A, Kurko SV, Mitrić M, Umićević A, Radaković J, Batalović K. Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy. 2021;46(24):13070-13081.
doi:10.1016/j.ijhydene.2021.01.086 .
Dragojlović, Milijana, Milanović, Igor, Gradišek, Anton, Kurko, Sandra V., Mitrić, Miodrag, Umićević, Ana, Radaković, Jana, Batalović, Katarina, "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study" in International Journal of Hydrogen Energy, 46, no. 24 (2021):13070-13081,
https://doi.org/10.1016/j.ijhydene.2021.01.086 . .

Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions

Milićević, Aleksandar; Belošević, Srđan; Crnomarković, Nenad Đ.; Tomanović, Ivan D.; Stojanović, Andrijana D.; Tucaković, Dragan; Lei Deng; Che, Defu

(2021)

TY  - JOUR
AU  - Milićević, Aleksandar
AU  - Belošević, Srđan
AU  - Crnomarković, Nenad Đ.
AU  - Tomanović, Ivan D.
AU  - Stojanović, Andrijana D.
AU  - Tucaković, Dragan
AU  - Lei Deng
AU  - Che, Defu
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9916
AB  - The co-combustion of biomass and coal in a utility boiler could provide cleaner power production and ensure sustainable utilization of the solid fuels. This paper aims to numerically investigate complex processes in the tangentially-fired 900 MWth boiler furnace during direct co-firing of lignite and biomass with 10% thermal share of agricultural residues (wheat straw, corn straw and soybean straw) under variable boiler loads (100%, 85% and 70%). Simulations are conducted by means of in-house developed computer code, supported by the specially designed user-friendly graphical interface. Co-firing of agricultural residues provides lower pollutant emissions, somewhat higher furnace exit gas temperature and increase in unburnt carbon in bottom/fly ash, compared to the lignite combustion without biomass. Soybean is found to be the most suitable for co-firing regarding its ash melting point, however due to its abundance and availability the wheat straw is selected for this study. Co-combustion at partial boiler loads results in reduction of NOx and SOx up to 34% and 9.5%, respectively. Burners arrangement and furnace aerodynamics affect the abatement of pollutants. This study may help the global efforts in fighting the climate change, efficiently and cost-effectively, thus offering considerable economic and social benefits.
T2  - International Journal of Heat and Mass Transfer
T1  - Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions
VL  - 181
SP  - 121728
DO  - 10.1016/j.ijheatmasstransfer.2021.121728
ER  - 
@article{
author = "Milićević, Aleksandar and Belošević, Srđan and Crnomarković, Nenad Đ. and Tomanović, Ivan D. and Stojanović, Andrijana D. and Tucaković, Dragan and Lei Deng and Che, Defu",
year = "2021",
abstract = "The co-combustion of biomass and coal in a utility boiler could provide cleaner power production and ensure sustainable utilization of the solid fuels. This paper aims to numerically investigate complex processes in the tangentially-fired 900 MWth boiler furnace during direct co-firing of lignite and biomass with 10% thermal share of agricultural residues (wheat straw, corn straw and soybean straw) under variable boiler loads (100%, 85% and 70%). Simulations are conducted by means of in-house developed computer code, supported by the specially designed user-friendly graphical interface. Co-firing of agricultural residues provides lower pollutant emissions, somewhat higher furnace exit gas temperature and increase in unburnt carbon in bottom/fly ash, compared to the lignite combustion without biomass. Soybean is found to be the most suitable for co-firing regarding its ash melting point, however due to its abundance and availability the wheat straw is selected for this study. Co-combustion at partial boiler loads results in reduction of NOx and SOx up to 34% and 9.5%, respectively. Burners arrangement and furnace aerodynamics affect the abatement of pollutants. This study may help the global efforts in fighting the climate change, efficiently and cost-effectively, thus offering considerable economic and social benefits.",
journal = "International Journal of Heat and Mass Transfer",
title = "Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions",
volume = "181",
pages = "121728",
doi = "10.1016/j.ijheatmasstransfer.2021.121728"
}
Milićević, A., Belošević, S., Crnomarković, N. Đ., Tomanović, I. D., Stojanović, A. D., Tucaković, D., Lei Deng,& Che, D.. (2021). Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions. in International Journal of Heat and Mass Transfer, 181, 121728.
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121728
Milićević A, Belošević S, Crnomarković NĐ, Tomanović ID, Stojanović AD, Tucaković D, Lei Deng, Che D. Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions. in International Journal of Heat and Mass Transfer. 2021;181:121728.
doi:10.1016/j.ijheatmasstransfer.2021.121728 .
Milićević, Aleksandar, Belošević, Srđan, Crnomarković, Nenad Đ., Tomanović, Ivan D., Stojanović, Andrijana D., Tucaković, Dragan, Lei Deng, Che, Defu, "Numerical study of co-firing lignite and agricultural biomass in utility boiler under variable operation conditions" in International Journal of Heat and Mass Transfer, 181 (2021):121728,
https://doi.org/10.1016/j.ijheatmasstransfer.2021.121728 . .

Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect

Aranđelović, Nemanja; Nikezić, Dušan; Brajović, Dragan; Ramadani, Uzahir

(2021)

TY  - JOUR
AU  - Aranđelović, Nemanja
AU  - Nikezić, Dušan
AU  - Brajović, Dragan
AU  - Ramadani, Uzahir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9876
AB  - In this paper, the possibility of measuring the electronic pulse from an electronic generator for plasma heating by electro-optical method is considered. The experiments are performed by applying the Kerr effect on an electronic generator model. Kerr effect shows very good characteristics for measuring nanosecond pulse rate. However, the results obtained show that these characteristics are significantly spoiled by gamma radiation in a dynamic state as well as by the absorbed dose of gamma radiation. When the simplicity of measuring with a capacitive probe is added to that, it can be concluded that the Kerr electro-optical effect is not recommended for measurement in fusion experiments.
T2  - Radiation Effects and Defects in Solids
T1  - Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect
VL  - 176
IS  - 7-8
SP  - 747
EP  - 757
DO  - 10.1080/10420150.2021.1950153
ER  - 
@article{
author = "Aranđelović, Nemanja and Nikezić, Dušan and Brajović, Dragan and Ramadani, Uzahir",
year = "2021",
abstract = "In this paper, the possibility of measuring the electronic pulse from an electronic generator for plasma heating by electro-optical method is considered. The experiments are performed by applying the Kerr effect on an electronic generator model. Kerr effect shows very good characteristics for measuring nanosecond pulse rate. However, the results obtained show that these characteristics are significantly spoiled by gamma radiation in a dynamic state as well as by the absorbed dose of gamma radiation. When the simplicity of measuring with a capacitive probe is added to that, it can be concluded that the Kerr electro-optical effect is not recommended for measurement in fusion experiments.",
journal = "Radiation Effects and Defects in Solids",
title = "Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect",
volume = "176",
number = "7-8",
pages = "747-757",
doi = "10.1080/10420150.2021.1950153"
}
Aranđelović, N., Nikezić, D., Brajović, D.,& Ramadani, U.. (2021). Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect. in Radiation Effects and Defects in Solids, 176(7-8), 747-757.
https://doi.org/10.1080/10420150.2021.1950153
Aranđelović N, Nikezić D, Brajović D, Ramadani U. Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect. in Radiation Effects and Defects in Solids. 2021;176(7-8):747-757.
doi:10.1080/10420150.2021.1950153 .
Aranđelović, Nemanja, Nikezić, Dušan, Brajović, Dragan, Ramadani, Uzahir, "Influence of gamma radiation on measurement fast pulse voltages by Kerr electro-optic effect" in Radiation Effects and Defects in Solids, 176, no. 7-8 (2021):747-757,
https://doi.org/10.1080/10420150.2021.1950153 . .

Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering

Matović, Branko; Maletaškić, Jelena; Prikhna, Tatiana; Urbanovich, Vladimir; Girman, Vladimir; Lisnichuk, Maksym; Todorović, Bratislav; Yoshida, Kutsami; Cvijović-Alagić, Ivana

(2021)

TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Prikhna, Tatiana
AU  - Urbanovich, Vladimir
AU  - Girman, Vladimir
AU  - Lisnichuk, Maksym
AU  - Todorović, Bratislav
AU  - Yoshida, Kutsami
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9405
AB  - Additive-free boron carbide (B4C) – silicon carbide (SiC) ceramic composites with different B4C and β-SiC powders ratio were densified using the high-pressure “anvil-type with hollows” apparatus at 1500 °C under a pressure of 4 GPa for 60 s in air. The effect of starting powders ratio on the composites sintering behavior, relative density, microstructural development, and thermomechanical properties was studied. The sintered samples hardness was found to be in the range from 24 to 31 GPa. The thermal conductivity measurements, conducted in the temperature range from room temperature to 1000 °C, showed that the thermal diffusivity of sintered samples was between 6 and 9.5 mm2/s whereas the thermal conductivity was in the range from 16 to 28 W/(m K). The results of this study show that the high-pressure sintering can be a very effective low-temperature densification method for the obtainment of additive-free B4C - β-SiC ceramic composites. © 2021 Elsevier Ltd
T2  - Journal of the European Ceramic Society
T1  - Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering
VL  - 41
IS  - 9
SP  - 4755
EP  - 4760
DO  - 10.1016/j.jeurceramsoc.2021.03.047
ER  - 
@article{
author = "Matović, Branko and Maletaškić, Jelena and Prikhna, Tatiana and Urbanovich, Vladimir and Girman, Vladimir and Lisnichuk, Maksym and Todorović, Bratislav and Yoshida, Kutsami and Cvijović-Alagić, Ivana",
year = "2021",
abstract = "Additive-free boron carbide (B4C) – silicon carbide (SiC) ceramic composites with different B4C and β-SiC powders ratio were densified using the high-pressure “anvil-type with hollows” apparatus at 1500 °C under a pressure of 4 GPa for 60 s in air. The effect of starting powders ratio on the composites sintering behavior, relative density, microstructural development, and thermomechanical properties was studied. The sintered samples hardness was found to be in the range from 24 to 31 GPa. The thermal conductivity measurements, conducted in the temperature range from room temperature to 1000 °C, showed that the thermal diffusivity of sintered samples was between 6 and 9.5 mm2/s whereas the thermal conductivity was in the range from 16 to 28 W/(m K). The results of this study show that the high-pressure sintering can be a very effective low-temperature densification method for the obtainment of additive-free B4C - β-SiC ceramic composites. © 2021 Elsevier Ltd",
journal = "Journal of the European Ceramic Society",
title = "Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering",
volume = "41",
number = "9",
pages = "4755-4760",
doi = "10.1016/j.jeurceramsoc.2021.03.047"
}
Matović, B., Maletaškić, J., Prikhna, T., Urbanovich, V., Girman, V., Lisnichuk, M., Todorović, B., Yoshida, K.,& Cvijović-Alagić, I.. (2021). Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering. in Journal of the European Ceramic Society, 41(9), 4755-4760.
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047
Matović B, Maletaškić J, Prikhna T, Urbanovich V, Girman V, Lisnichuk M, Todorović B, Yoshida K, Cvijović-Alagić I. Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering. in Journal of the European Ceramic Society. 2021;41(9):4755-4760.
doi:10.1016/j.jeurceramsoc.2021.03.047 .
Matović, Branko, Maletaškić, Jelena, Prikhna, Tatiana, Urbanovich, Vladimir, Girman, Vladimir, Lisnichuk, Maksym, Todorović, Bratislav, Yoshida, Kutsami, Cvijović-Alagić, Ivana, "Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering" in Journal of the European Ceramic Society, 41, no. 9 (2021):4755-4760,
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047 . .
3
3
2

Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047))

Matović, Branko; Maletaškić, Jelena; Prikhna, Tatiana; Urbanovich, Vladimir; Girman, Vladimir; Lisnichuk, Maksym; Todorović, Bratislav; Yoshida, Kutsami; Cvijović-Alagić, Ivana

(2021)

TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Prikhna, Tatiana
AU  - Urbanovich, Vladimir
AU  - Girman, Vladimir
AU  - Lisnichuk, Maksym
AU  - Todorović, Bratislav
AU  - Yoshida, Kutsami
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9835
T2  - Journal of the European Ceramic Society
T1  - Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047))
VL  - 41
IS  - 9
DO  - 10.1016/j.jeurceramsoc.2021.03.047
ER  - 
@article{
author = "Matović, Branko and Maletaškić, Jelena and Prikhna, Tatiana and Urbanovich, Vladimir and Girman, Vladimir and Lisnichuk, Maksym and Todorović, Bratislav and Yoshida, Kutsami and Cvijović-Alagić, Ivana",
year = "2021",
journal = "Journal of the European Ceramic Society",
title = "Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047))",
volume = "41",
number = "9",
doi = "10.1016/j.jeurceramsoc.2021.03.047"
}
Matović, B., Maletaškić, J., Prikhna, T., Urbanovich, V., Girman, V., Lisnichuk, M., Todorović, B., Yoshida, K.,& Cvijović-Alagić, I.. (2021). Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047)). in Journal of the European Ceramic Society, 41(9).
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047
Matović B, Maletaškić J, Prikhna T, Urbanovich V, Girman V, Lisnichuk M, Todorović B, Yoshida K, Cvijović-Alagić I. Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047)). in Journal of the European Ceramic Society. 2021;41(9).
doi:10.1016/j.jeurceramsoc.2021.03.047 .
Matović, Branko, Maletaškić, Jelena, Prikhna, Tatiana, Urbanovich, Vladimir, Girman, Vladimir, Lisnichuk, Maksym, Todorović, Bratislav, Yoshida, Kutsami, Cvijović-Alagić, Ivana, "Erratum: “Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering” [J. Eur. Ceram. Soc. 41 (August) (2021) 4755–4760] (Journal of the European Ceramic Society (2021) 41(9) (4755–4760), (S0955221921002089), (10.1016/j.jeurceramsoc.2021.03.047))" in Journal of the European Ceramic Society, 41, no. 9 (2021),
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047 . .
3

Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics

Laketić, Slađana; Rakin, Marko; Momčilović, Miloš; Ciganović, Jovan; Veljović, Đorđe N.; Cvijović-Alagić, Ivana

(2021)

TY  - JOUR
AU  - Laketić, Slađana
AU  - Rakin, Marko
AU  - Momčilović, Miloš
AU  - Ciganović, Jovan
AU  - Veljović, Đorđe N.
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9747
AB  - In the present study surface alterations of the high pressure torsion (HPT)-deformed Ti[sbnd]45Nb (mass%) alloy induced by laser irradiation treatment are presented. The alloy was irradiated in air, argon, and nitrogen atmosphere using the Nd:YAG laser. Laser-induced surface modifications were analyzed by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), profilometric analysis, and Vickers microhardness measurements. Alloy irradiation under a low laser output energy and a low number of accumulated pulses resulted in the formation of shallow surface craters. An increase of these irradiation parameters caused the appearance of more pronounced surface craters with microcracks and hydrodynamic effects in the form of wave-like structures, ripples, and solidified droplets and consequently caused an increase in the surface roughness. The highest value of the surface roughness of 3.062 μm was attained during the alloy irradiation in argon atmosphere under 15 mJ with 150 accumulated pulses. Interaction of the laser beam with the alloy surface was accompanied by plasma formation and surface ablation due to the irradiation energy absorption. The maximal ablated target material volumes of 5.5 × 1014 nm3 and 2.6 × 1014 nm3 were observed after the irradiation under 15 mJ with 150 accumulated pulses in argon and air atmosphere, respectively. Moreover, attainment of high temperatures at the alloy surface induced its chemical composition alterations. Formation of mixed Ti- and Nb-oxide surface film and absence of nitride particles at the alloy surface was detected irrespective of the irradiation atmosphere. Irradiation in air resulted in the appearance of the most pronounced surface oxide layer with the highest microhardness value which can in great merit influence an increase of the alloy bio-integration abilities and its tribo-corrosion resistance. © 2021 Elsevier B.V.
T2  - Surface and Coatings Technology
T1  - Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics
VL  - 418
SP  - 127255
DO  - 10.1016/j.surfcoat.2021.127255
ER  - 
@article{
author = "Laketić, Slađana and Rakin, Marko and Momčilović, Miloš and Ciganović, Jovan and Veljović, Đorđe N. and Cvijović-Alagić, Ivana",
year = "2021",
abstract = "In the present study surface alterations of the high pressure torsion (HPT)-deformed Ti[sbnd]45Nb (mass%) alloy induced by laser irradiation treatment are presented. The alloy was irradiated in air, argon, and nitrogen atmosphere using the Nd:YAG laser. Laser-induced surface modifications were analyzed by field-emission scanning electron microscopy (FE-SEM), energy-dispersive spectroscopy (EDS), profilometric analysis, and Vickers microhardness measurements. Alloy irradiation under a low laser output energy and a low number of accumulated pulses resulted in the formation of shallow surface craters. An increase of these irradiation parameters caused the appearance of more pronounced surface craters with microcracks and hydrodynamic effects in the form of wave-like structures, ripples, and solidified droplets and consequently caused an increase in the surface roughness. The highest value of the surface roughness of 3.062 μm was attained during the alloy irradiation in argon atmosphere under 15 mJ with 150 accumulated pulses. Interaction of the laser beam with the alloy surface was accompanied by plasma formation and surface ablation due to the irradiation energy absorption. The maximal ablated target material volumes of 5.5 × 1014 nm3 and 2.6 × 1014 nm3 were observed after the irradiation under 15 mJ with 150 accumulated pulses in argon and air atmosphere, respectively. Moreover, attainment of high temperatures at the alloy surface induced its chemical composition alterations. Formation of mixed Ti- and Nb-oxide surface film and absence of nitride particles at the alloy surface was detected irrespective of the irradiation atmosphere. Irradiation in air resulted in the appearance of the most pronounced surface oxide layer with the highest microhardness value which can in great merit influence an increase of the alloy bio-integration abilities and its tribo-corrosion resistance. © 2021 Elsevier B.V.",
journal = "Surface and Coatings Technology",
title = "Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics",
volume = "418",
pages = "127255",
doi = "10.1016/j.surfcoat.2021.127255"
}
Laketić, S., Rakin, M., Momčilović, M., Ciganović, J., Veljović, Đ. N.,& Cvijović-Alagić, I.. (2021). Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics. in Surface and Coatings Technology, 418, 127255.
https://doi.org/10.1016/j.surfcoat.2021.127255
Laketić S, Rakin M, Momčilović M, Ciganović J, Veljović ĐN, Cvijović-Alagić I. Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics. in Surface and Coatings Technology. 2021;418:127255.
doi:10.1016/j.surfcoat.2021.127255 .
Laketić, Slađana, Rakin, Marko, Momčilović, Miloš, Ciganović, Jovan, Veljović, Đorđe N., Cvijović-Alagić, Ivana, "Influence of laser irradiation parameters on the ultrafine-grained Ti45Nb alloy surface characteristics" in Surface and Coatings Technology, 418 (2021):127255,
https://doi.org/10.1016/j.surfcoat.2021.127255 . .
1
1
1

Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles

Matijević, Milica; Žakula, Jelena; Korićanac, Lela; Radoičić, Marija B.; Liang, Xinyue; Mi, Lan; Filipović Tričković, Jelena G.; Valenta-Šobot, Ana; Stanković, Maja N.; Nakarada, Đura; Mojović, Miloš; Petković, Marijana; Stepić, Milutin; Nešić, Maja D.

(2021)

TY  - JOUR
AU  - Matijević, Milica
AU  - Žakula, Jelena
AU  - Korićanac, Lela
AU  - Radoičić, Marija B.
AU  - Liang, Xinyue
AU  - Mi, Lan
AU  - Filipović Tričković, Jelena G.
AU  - Valenta-Šobot, Ana
AU  - Stanković, Maja N.
AU  - Nakarada, Đura
AU  - Mojović, Miloš
AU  - Petković, Marijana
AU  - Stepić, Milutin
AU  - Nešić, Maja D.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9908
AB  - In this study, C-doped TiO2 nanoparticles (C-TiO2) were prepared and tested as a photosensitizer for visible-light-driven photodynamic therapy against cervical cancer cells (HeLa). X-ray diffraction and Transmission Electron Microscopy confirmed the anatase form of nanoparticles, spherical shape, and size distribution from 5 to 15 nm. Ultraviolet–visible light spectroscopy showed that C doping of TiO2 enhances the optical absorption in the visible light range caused by a bandgap narrowing. The photo-cytotoxic activity of C-TiO2 was investigated in vitro against HeLa cells. The lack of dark cytotoxicity indicates good biocompatibility of C-TiO2. In contrast, a combination with blue light significantly reduced the survival of HeLa cells: illumination only decreased cell viability by 30% (15 min of illumination, 120 µW power), and 60% when HeLa cells were preincubated with C-TiO2. We have also confirmed blue light-induced C-TiO2-catalyzed generation of reactive oxygen species in vitro and intracellularly. Oxidative stress triggered by C-TiO2/blue light was the leading cause of HeLa cell death. Fluorescent labeling of treated HeLa cells showed distinct morphological changes after the C-TiO2/blue light treatment. Unlike blue light illumination, which caused the appearance of large necrotic cells with deformed nuclei, cytoplasm swelling, and membrane blebbing, a combination of C-TiO2/blue light leads to controlled cell death, thus providing a better outcome of local anticancer therapy.
T2  - Photochemical & Photobiological Sciences
T1  - Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles
VL  - 20
IS  - 8
SP  - 1087
EP  - 1098
DO  - 10.1007/s43630-021-00082-2
ER  - 
@article{
author = "Matijević, Milica and Žakula, Jelena and Korićanac, Lela and Radoičić, Marija B. and Liang, Xinyue and Mi, Lan and Filipović Tričković, Jelena G. and Valenta-Šobot, Ana and Stanković, Maja N. and Nakarada, Đura and Mojović, Miloš and Petković, Marijana and Stepić, Milutin and Nešić, Maja D.",
year = "2021",
abstract = "In this study, C-doped TiO2 nanoparticles (C-TiO2) were prepared and tested as a photosensitizer for visible-light-driven photodynamic therapy against cervical cancer cells (HeLa). X-ray diffraction and Transmission Electron Microscopy confirmed the anatase form of nanoparticles, spherical shape, and size distribution from 5 to 15 nm. Ultraviolet–visible light spectroscopy showed that C doping of TiO2 enhances the optical absorption in the visible light range caused by a bandgap narrowing. The photo-cytotoxic activity of C-TiO2 was investigated in vitro against HeLa cells. The lack of dark cytotoxicity indicates good biocompatibility of C-TiO2. In contrast, a combination with blue light significantly reduced the survival of HeLa cells: illumination only decreased cell viability by 30% (15 min of illumination, 120 µW power), and 60% when HeLa cells were preincubated with C-TiO2. We have also confirmed blue light-induced C-TiO2-catalyzed generation of reactive oxygen species in vitro and intracellularly. Oxidative stress triggered by C-TiO2/blue light was the leading cause of HeLa cell death. Fluorescent labeling of treated HeLa cells showed distinct morphological changes after the C-TiO2/blue light treatment. Unlike blue light illumination, which caused the appearance of large necrotic cells with deformed nuclei, cytoplasm swelling, and membrane blebbing, a combination of C-TiO2/blue light leads to controlled cell death, thus providing a better outcome of local anticancer therapy.",
journal = "Photochemical & Photobiological Sciences",
title = "Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles",
volume = "20",
number = "8",
pages = "1087-1098",
doi = "10.1007/s43630-021-00082-2"
}
Matijević, M., Žakula, J., Korićanac, L., Radoičić, M. B., Liang, X., Mi, L., Filipović Tričković, J. G., Valenta-Šobot, A., Stanković, M. N., Nakarada, Đ., Mojović, M., Petković, M., Stepić, M.,& Nešić, M. D.. (2021). Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles. in Photochemical & Photobiological Sciences, 20(8), 1087-1098.
https://doi.org/10.1007/s43630-021-00082-2
Matijević M, Žakula J, Korićanac L, Radoičić MB, Liang X, Mi L, Filipović Tričković JG, Valenta-Šobot A, Stanković MN, Nakarada Đ, Mojović M, Petković M, Stepić M, Nešić MD. Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles. in Photochemical & Photobiological Sciences. 2021;20(8):1087-1098.
doi:10.1007/s43630-021-00082-2 .
Matijević, Milica, Žakula, Jelena, Korićanac, Lela, Radoičić, Marija B., Liang, Xinyue, Mi, Lan, Filipović Tričković, Jelena G., Valenta-Šobot, Ana, Stanković, Maja N., Nakarada, Đura, Mojović, Miloš, Petković, Marijana, Stepić, Milutin, Nešić, Maja D., "Controlled killing of human cervical cancer cells by combined action of blue light and C-doped TiO2 nanoparticles" in Photochemical & Photobiological Sciences, 20, no. 8 (2021):1087-1098,
https://doi.org/10.1007/s43630-021-00082-2 . .

Classical patterns in the quantum rainbow channeling of high energy electrons

Ćosić, Marko; Petrović, Srđan M.; Takabayashi, Yuichi

(2021)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Petrović, Srđan M.
AU  - Takabayashi, Yuichi
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9144
AB  - We are investigating the quantum dynamics of a well-collimated electron beam transmitting through planar channels of the Si crystal. Electron states were represented by wave packets while the electron beam is treated as an ensemble of noninteracting wave packets. We have investigated the relationship between classical caustic pattern and anharmonicity of the potential and analyzed how quantum dynamic depends on the wave packet impact parameter and beam's angular divergence. We found that the extrema of the electron trajectory period, considered as a function of the impact parameter, determine the shape of the caustic pattern. All wave packet probability densities have multiple maxima generated by a self-interference. Their sum, that represents probability density of an ensemble, was found to depends strongly on the beam angular divergence. For small divergence, most peaks of different wave packets are aligned causing wavelike behavior of the ensemble. For moderate angular divergence maxima of some wave packets, are aligned with minima of others, resulting in the emergence of the classical caustic pattern. We have shown and experimentally confirmed that the only indication that the observed caustic pattern is generated by the quantum dynamics is a slight systematic shift of the corresponding caustic maxima. © 2021 American Physical Society.
T2  - Physical Review A
T1  - Classical patterns in the quantum rainbow channeling of high energy electrons
VL  - 103
IS  - 2
SP  - 022818
DO  - 10.1103/PhysRevA.103.022818
ER  - 
@article{
author = "Ćosić, Marko and Petrović, Srđan M. and Takabayashi, Yuichi",
year = "2021",
abstract = "We are investigating the quantum dynamics of a well-collimated electron beam transmitting through planar channels of the Si crystal. Electron states were represented by wave packets while the electron beam is treated as an ensemble of noninteracting wave packets. We have investigated the relationship between classical caustic pattern and anharmonicity of the potential and analyzed how quantum dynamic depends on the wave packet impact parameter and beam's angular divergence. We found that the extrema of the electron trajectory period, considered as a function of the impact parameter, determine the shape of the caustic pattern. All wave packet probability densities have multiple maxima generated by a self-interference. Their sum, that represents probability density of an ensemble, was found to depends strongly on the beam angular divergence. For small divergence, most peaks of different wave packets are aligned causing wavelike behavior of the ensemble. For moderate angular divergence maxima of some wave packets, are aligned with minima of others, resulting in the emergence of the classical caustic pattern. We have shown and experimentally confirmed that the only indication that the observed caustic pattern is generated by the quantum dynamics is a slight systematic shift of the corresponding caustic maxima. © 2021 American Physical Society.",
journal = "Physical Review A",
title = "Classical patterns in the quantum rainbow channeling of high energy electrons",
volume = "103",
number = "2",
pages = "022818",
doi = "10.1103/PhysRevA.103.022818"
}
Ćosić, M., Petrović, S. M.,& Takabayashi, Y.. (2021). Classical patterns in the quantum rainbow channeling of high energy electrons. in Physical Review A, 103(2), 022818.
https://doi.org/10.1103/PhysRevA.103.022818
Ćosić M, Petrović SM, Takabayashi Y. Classical patterns in the quantum rainbow channeling of high energy electrons. in Physical Review A. 2021;103(2):022818.
doi:10.1103/PhysRevA.103.022818 .
Ćosić, Marko, Petrović, Srđan M., Takabayashi, Yuichi, "Classical patterns in the quantum rainbow channeling of high energy electrons" in Physical Review A, 103, no. 2 (2021):022818,
https://doi.org/10.1103/PhysRevA.103.022818 . .

The quantitative 6H-SiC crystal damage depth profiling

Gloginjić, Marko; Erich, Marko; Kokkoris, Michael; Liarokapis, E.; Fazinić, Stjepko; Karlušić, Marko; Tomić Luketić, Kristina; Petrović, Srđan M.

(2021)

TY  - JOUR
AU  - Gloginjić, Marko
AU  - Erich, Marko
AU  - Kokkoris, Michael
AU  - Liarokapis, E.
AU  - Fazinić, Stjepko
AU  - Karlušić, Marko
AU  - Tomić Luketić, Kristina
AU  - Petrović, Srđan M. 
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9858
AB  - The hexagonal silicon carbide (6H-SiC) is one of materials used in nuclear applications, and as such is exposed to crystal damage inducing by variety of energetic particles like neutrons. In this article the 6H-SiC crystal lattice damage was introduced by the 4 MeV C3+ and 4 MeV Si3+ channelling ion implantation at the room temperature. The implantation of C and Si ions (so called self-ions) to the set of different fluences, achieves a 6H-SiC crystal lattice damage more similar to what the exposure to neutrons would produce. The 6H-SiC crystal damage has been investigated by the Elastic Backscattering spectra taken in the channeling orientation (EBS/C). EBS/C spectra of the implanted 6H-SiC samples were taken with 1.725 MeV and 1.860 MeV protons. By fitting the EBS/C spectra, the quantitative 6H-SiC crystal damage depth profiles were obtained. Further, the cross section of crystal's implanted region has been scanned with the micro-Raman (μR) technique for a comparison. In this way, the qualitative analysis of a non-crystalline phase as a function of the crystal depth was independently determined. Additionally, a scanning electron microscopy (SEM) image was taken of the implanted crystal cross sections. The comparison of the crystal damage profiles obtained by fitting EBS/C spectra with the corresponding ones obtained with the μR and SEM techniques shows very good consistency between them.
T2  - Journal of Nuclear Materials
T1  - The quantitative 6H-SiC crystal damage depth profiling
VL  - 555
SP  - 153143
DO  - 10.1016/j.jnucmat.2021.153143
ER  - 
@article{
author = "Gloginjić, Marko and Erich, Marko and Kokkoris, Michael and Liarokapis, E. and Fazinić, Stjepko and Karlušić, Marko and Tomić Luketić, Kristina and Petrović, Srđan M. ",
year = "2021",
abstract = "The hexagonal silicon carbide (6H-SiC) is one of materials used in nuclear applications, and as such is exposed to crystal damage inducing by variety of energetic particles like neutrons. In this article the 6H-SiC crystal lattice damage was introduced by the 4 MeV C3+ and 4 MeV Si3+ channelling ion implantation at the room temperature. The implantation of C and Si ions (so called self-ions) to the set of different fluences, achieves a 6H-SiC crystal lattice damage more similar to what the exposure to neutrons would produce. The 6H-SiC crystal damage has been investigated by the Elastic Backscattering spectra taken in the channeling orientation (EBS/C). EBS/C spectra of the implanted 6H-SiC samples were taken with 1.725 MeV and 1.860 MeV protons. By fitting the EBS/C spectra, the quantitative 6H-SiC crystal damage depth profiles were obtained. Further, the cross section of crystal's implanted region has been scanned with the micro-Raman (μR) technique for a comparison. In this way, the qualitative analysis of a non-crystalline phase as a function of the crystal depth was independently determined. Additionally, a scanning electron microscopy (SEM) image was taken of the implanted crystal cross sections. The comparison of the crystal damage profiles obtained by fitting EBS/C spectra with the corresponding ones obtained with the μR and SEM techniques shows very good consistency between them.",
journal = "Journal of Nuclear Materials",
title = "The quantitative 6H-SiC crystal damage depth profiling",
volume = "555",
pages = "153143",
doi = "10.1016/j.jnucmat.2021.153143"
}
Gloginjić, M., Erich, M., Kokkoris, M., Liarokapis, E., Fazinić, S., Karlušić, M., Tomić Luketić, K.,& Petrović, S. M.. (2021). The quantitative 6H-SiC crystal damage depth profiling. in Journal of Nuclear Materials, 555, 153143.
https://doi.org/10.1016/j.jnucmat.2021.153143
Gloginjić M, Erich M, Kokkoris M, Liarokapis E, Fazinić S, Karlušić M, Tomić Luketić K, Petrović SM. The quantitative 6H-SiC crystal damage depth profiling. in Journal of Nuclear Materials. 2021;555:153143.
doi:10.1016/j.jnucmat.2021.153143 .
Gloginjić, Marko, Erich, Marko, Kokkoris, Michael, Liarokapis, E., Fazinić, Stjepko, Karlušić, Marko, Tomić Luketić, Kristina, Petrović, Srđan M. , "The quantitative 6H-SiC crystal damage depth profiling" in Journal of Nuclear Materials, 555 (2021):153143,
https://doi.org/10.1016/j.jnucmat.2021.153143 . .

Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry

Vukanac, Ivana; Đurašević, Mirjana M.; Krneta-Nikolić, Jelena D.; Pantelić, Gordana K.; Rajačić, Milica; Janković, Marija M.; Sarap, Nataša; Todorović, Dragana

(2021)

TY  - JOUR
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana M.
AU  - Krneta-Nikolić, Jelena D.
AU  - Pantelić, Gordana K.
AU  - Rajačić, Milica
AU  - Janković, Marija M.
AU  - Sarap, Nataša
AU  - Todorović, Dragana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9136
AB  - The procedure of radioactive standards preparation by spiking selected matrices with a certified mixture of radionuclides and its validation is presented in this paper. The uncertainty budget of standard total activity was elaborated in details. The experimentally obtained efficiency curves, as well as comparison with the curves obtained by the efficiency transfer, are presented. Additionally, in order to confirm claimed homogeneity of prepared standard bulk materials, the efficiency versus density dependence for the individual gamma ray energies was checked for the same geometries and the results are presented. The results of the participation in recent IAEA PT scheme are discussed also. © 2021 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry
VL  - 183
SP  - 109407
DO  - 10.1016/j.radphyschem.2021.109407
ER  - 
@article{
author = "Vukanac, Ivana and Đurašević, Mirjana M. and Krneta-Nikolić, Jelena D. and Pantelić, Gordana K. and Rajačić, Milica and Janković, Marija M. and Sarap, Nataša and Todorović, Dragana",
year = "2021",
abstract = "The procedure of radioactive standards preparation by spiking selected matrices with a certified mixture of radionuclides and its validation is presented in this paper. The uncertainty budget of standard total activity was elaborated in details. The experimentally obtained efficiency curves, as well as comparison with the curves obtained by the efficiency transfer, are presented. Additionally, in order to confirm claimed homogeneity of prepared standard bulk materials, the efficiency versus density dependence for the individual gamma ray energies was checked for the same geometries and the results are presented. The results of the participation in recent IAEA PT scheme are discussed also. © 2021 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry",
volume = "183",
pages = "109407",
doi = "10.1016/j.radphyschem.2021.109407"
}
Vukanac, I., Đurašević, M. M., Krneta-Nikolić, J. D., Pantelić, G. K., Rajačić, M., Janković, M. M., Sarap, N.,& Todorović, D.. (2021). Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry. in Radiation Physics and Chemistry, 183, 109407.
https://doi.org/10.1016/j.radphyschem.2021.109407
Vukanac I, Đurašević MM, Krneta-Nikolić JD, Pantelić GK, Rajačić M, Janković MM, Sarap N, Todorović D. Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry. in Radiation Physics and Chemistry. 2021;183:109407.
doi:10.1016/j.radphyschem.2021.109407 .
Vukanac, Ivana, Đurašević, Mirjana M., Krneta-Nikolić, Jelena D., Pantelić, Gordana K., Rajačić, Milica, Janković, Marija M., Sarap, Nataša, Todorović, Dragana, "Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry" in Radiation Physics and Chemistry, 183 (2021):109407,
https://doi.org/10.1016/j.radphyschem.2021.109407 . .

Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods

Popov, Nina; Bošković, Marko; Perović, Marija M.; Németh, Zoltán; Wang, Junhu; Kuang, Zhichong; Reissner, Michael; Kuzmann, Ernő; Homonnay, Zoltán; Kubuki, Shiro; Marciuš, Marijan; Ristić, Mira; Musić, Svetozar; Stanković, Dalibor M.; Krehula, Stjepko

(2021)

TY  - JOUR
AU  - Popov, Nina
AU  - Bošković, Marko
AU  - Perović, Marija M.
AU  - Németh, Zoltán
AU  - Wang, Junhu
AU  - Kuang, Zhichong
AU  - Reissner, Michael
AU  - Kuzmann, Ernő
AU  - Homonnay, Zoltán
AU  - Kubuki, Shiro
AU  - Marciuš, Marijan
AU  - Ristić, Mira
AU  - Musić, Svetozar
AU  - Stanković, Dalibor M.
AU  - Krehula, Stjepko
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9516
AB  - Pure hematite nanorods and very long and thin cobalt-doped hematite nanorods (nanoneedles) were prepared by a combined precipitation and annealing method. The influence of the level of cobalt doping on different properties of hematite nanorods was investigated. Incorporation of cobalt in the form of low-spin Co3+ ions into the structure of hematite by substitution for high-spin Fe3+ ions was proved by determination of a significant unit cell contraction by powder X-ray diffraction (PXRD) and characteristic positions of the absorption edge in X-ray absorption near edge structure (XANES) spectra and peaks in X-ray emission (XES) spectra. Cobalt doping caused a gradual elongation and thinning of hematite nanorods – very long and thin 1D nanoparticles (nanoneedles) were formed in the presence of 10 and 12 mol% Co. Magnetic measurements showed a strong increase in low-temperature remanent magnetization and coercivity upon cobalt doping, as well as a disappearance of the Morin transition, which was also confirmed by Mössbauer spectroscopy. Cobalt doping significantly affected optical properties of hematite nanorods – absorption in the visible and NIR ranges increased, which was accompanied by narrowing of the optical band gap. Compared with pure hematite nanorods cobalt-doped hematite nanoneedles showed a significantly better electrocatalytic activity for the oxygen evolution reaction (OER). © 2020 Elsevier Ltd
T2  - Journal of Physics and Chemistry of Solids
T1  - Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods
VL  - 152
SP  - 109929
DO  - 10.1016/j.jpcs.2020.109929
ER  - 
@article{
author = "Popov, Nina and Bošković, Marko and Perović, Marija M. and Németh, Zoltán and Wang, Junhu and Kuang, Zhichong and Reissner, Michael and Kuzmann, Ernő and Homonnay, Zoltán and Kubuki, Shiro and Marciuš, Marijan and Ristić, Mira and Musić, Svetozar and Stanković, Dalibor M. and Krehula, Stjepko",
year = "2021",
abstract = "Pure hematite nanorods and very long and thin cobalt-doped hematite nanorods (nanoneedles) were prepared by a combined precipitation and annealing method. The influence of the level of cobalt doping on different properties of hematite nanorods was investigated. Incorporation of cobalt in the form of low-spin Co3+ ions into the structure of hematite by substitution for high-spin Fe3+ ions was proved by determination of a significant unit cell contraction by powder X-ray diffraction (PXRD) and characteristic positions of the absorption edge in X-ray absorption near edge structure (XANES) spectra and peaks in X-ray emission (XES) spectra. Cobalt doping caused a gradual elongation and thinning of hematite nanorods – very long and thin 1D nanoparticles (nanoneedles) were formed in the presence of 10 and 12 mol% Co. Magnetic measurements showed a strong increase in low-temperature remanent magnetization and coercivity upon cobalt doping, as well as a disappearance of the Morin transition, which was also confirmed by Mössbauer spectroscopy. Cobalt doping significantly affected optical properties of hematite nanorods – absorption in the visible and NIR ranges increased, which was accompanied by narrowing of the optical band gap. Compared with pure hematite nanorods cobalt-doped hematite nanoneedles showed a significantly better electrocatalytic activity for the oxygen evolution reaction (OER). © 2020 Elsevier Ltd",
journal = "Journal of Physics and Chemistry of Solids",
title = "Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods",
volume = "152",
pages = "109929",
doi = "10.1016/j.jpcs.2020.109929"
}
Popov, N., Bošković, M., Perović, M. M., Németh, Z., Wang, J., Kuang, Z., Reissner, M., Kuzmann, E., Homonnay, Z., Kubuki, S., Marciuš, M., Ristić, M., Musić, S., Stanković, D. M.,& Krehula, S.. (2021). Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods. in Journal of Physics and Chemistry of Solids, 152, 109929.
https://doi.org/10.1016/j.jpcs.2020.109929
Popov N, Bošković M, Perović MM, Németh Z, Wang J, Kuang Z, Reissner M, Kuzmann E, Homonnay Z, Kubuki S, Marciuš M, Ristić M, Musić S, Stanković DM, Krehula S. Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods. in Journal of Physics and Chemistry of Solids. 2021;152:109929.
doi:10.1016/j.jpcs.2020.109929 .
Popov, Nina, Bošković, Marko, Perović, Marija M., Németh, Zoltán, Wang, Junhu, Kuang, Zhichong, Reissner, Michael, Kuzmann, Ernő, Homonnay, Zoltán, Kubuki, Shiro, Marciuš, Marijan, Ristić, Mira, Musić, Svetozar, Stanković, Dalibor M., Krehula, Stjepko, "Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods" in Journal of Physics and Chemistry of Solids, 152 (2021):109929,
https://doi.org/10.1016/j.jpcs.2020.109929 . .
2
2
2

The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers

Ivanović, Marija; Nenadović, Snežana S.; Pavlović, Vera P.; Radović, Ivona R.; Kijevčanin, Mirjana Lj.; Pavlović, Vladimir B.; Kljajević, Ljiljana

(2021)

TY  - JOUR
AU  - Ivanović, Marija
AU  - Nenadović, Snežana S.
AU  - Pavlović, Vera P.
AU  - Radović, Ivona R.
AU  - Kijevčanin, Mirjana Lj.
AU  - Pavlović, Vladimir B.
AU  - Kljajević, Ljiljana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9866
AB  - Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers
VL  - 40
IS  - 1
SP  - 99
DO  - 10.20450/mjcce.2021.2127
ER  - 
@article{
author = "Ivanović, Marija and Nenadović, Snežana S. and Pavlović, Vera P. and Radović, Ivona R. and Kijevčanin, Mirjana Lj. and Pavlović, Vladimir B. and Kljajević, Ljiljana",
year = "2021",
abstract = "Thermodynamic parameters (densities, viscosities, speed of sound, and refractive index) of four series of alkaline activators were determined over the temperature range from 15 to 60 °C for the process of geopolymerization. Mixtures of Na2SiO3and NaOH of different molar concentrations (from 2M to 8M with step 2) were used as an alkaline activator. The sample with the highest NaOH concentrationalso shows the highest values of all thermodynamic parameters.Metakaolin, obtained by calcination of kaolin at 750 °C, was used as the starting material.The samples were characterized by X-ray diffraction (XRD),FTIR and Raman spectroscopy, Scanning Electron Microscopy (SEM), and Energy-Dispersive X-Ray (EDX) Spectroscopy. Results of FTIR analysis correlated with results of Raman Spectroscopy. Due to the polymerization process, the changes in the phonon spectrum were confirmed. The different concentra-tions of activators do not notably change the Si/Al ratio.",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers",
volume = "40",
number = "1",
pages = "99",
doi = "10.20450/mjcce.2021.2127"
}
Ivanović, M., Nenadović, S. S., Pavlović, V. P., Radović, I. R., Kijevčanin, M. Lj., Pavlović, V. B.,& Kljajević, L.. (2021). The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering, 40(1), 99.
https://doi.org/10.20450/mjcce.2021.2127
Ivanović M, Nenadović SS, Pavlović VP, Radović IR, Kijevčanin ML, Pavlović VB, Kljajević L. The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers. in Macedonian Journal of Chemistry and Chemical Engineering. 2021;40(1):99.
doi:10.20450/mjcce.2021.2127 .
Ivanović, Marija, Nenadović, Snežana S., Pavlović, Vera P., Radović, Ivona R., Kijevčanin, Mirjana Lj., Pavlović, Vladimir B., Kljajević, Ljiljana, "The influence of thermodynamic parameters on alkaline activator of geopolymers and structure of geopolymers" in Macedonian Journal of Chemistry and Chemical Engineering, 40, no. 1 (2021):99,
https://doi.org/10.20450/mjcce.2021.2127 . .
1

Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate

Stojadinović, Stevan; Ćirić, Aleksandar

(2021)

TY  - JOUR
AU  - Stojadinović, Stevan
AU  - Ćirić, Aleksandar
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9135
AB  - Eu3+ and Tb3+ doped ZnO optical coatings were formed by the Plasma Electrolytic Oxidation (PEO) method from the pure Zn sheet, with various dopant concentrations. The morphologies show no significant change with the introduced dopant or their concentrations, with typical appearance of PEO formed coatings. All elements are uniformly distributed, and concentration of incorporated dopants is related to the concentrations of the Eu2O3 or Tb4O7 particles added to the basic electrolyte. Wurtzite structure of ZnO was identified in all the samples, with no change induced by the dopants. Under 260 nm excitation ZnO emits broad-band in the visible region attributed to oxygen interstitial defects and oxygen vacancies. Photoluminescence (PL) of ZnO:X3+ (X = Eu, Tb) is a sum of PL from ZnO and 4f–4f dopant emissions. Eu3+ and Tb3+ are most effectively excited in charge-transfer band and 4f5d levels, respectively. By increasing concentrations of the dopants the broad PL decreases in favor of the 4f–4f dopant transitions, an indication of the energy transfer. ZnO:Eu3+ spectra are dominated by the hypersensitive 5D0→7F2 transition. Eu3+ ions are incorporated in a highly asymmetric environment. PL emission at 541 nm is the most intense in ZnO:Tb3+. Judd-Ofelt intensity parameters rise with increasing Eu3+ concentration, up to Ω2 = 7.8·10−42 cm2 and Ω4 = 4.4·10−42 cm2. Radiative lifetime of 5D0 level drops to 1.12 ms. Chromaticity of PL varies with concentration only when the samples are irradiated by UV light, from white to orange-red or green for Eu3+ or Tb3+ doped samples, respectively. Eu3+ under 394 nm and 464 nm irradiation gives 99.5% color-purity. © 2021 Elsevier B.V.
T2  - Journal of Luminescence
T1  - Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate
VL  - 235
SP  - 118022
DO  - 10.1016/j.jlumin.2021.118022
ER  - 
@article{
author = "Stojadinović, Stevan and Ćirić, Aleksandar",
year = "2021",
abstract = "Eu3+ and Tb3+ doped ZnO optical coatings were formed by the Plasma Electrolytic Oxidation (PEO) method from the pure Zn sheet, with various dopant concentrations. The morphologies show no significant change with the introduced dopant or their concentrations, with typical appearance of PEO formed coatings. All elements are uniformly distributed, and concentration of incorporated dopants is related to the concentrations of the Eu2O3 or Tb4O7 particles added to the basic electrolyte. Wurtzite structure of ZnO was identified in all the samples, with no change induced by the dopants. Under 260 nm excitation ZnO emits broad-band in the visible region attributed to oxygen interstitial defects and oxygen vacancies. Photoluminescence (PL) of ZnO:X3+ (X = Eu, Tb) is a sum of PL from ZnO and 4f–4f dopant emissions. Eu3+ and Tb3+ are most effectively excited in charge-transfer band and 4f5d levels, respectively. By increasing concentrations of the dopants the broad PL decreases in favor of the 4f–4f dopant transitions, an indication of the energy transfer. ZnO:Eu3+ spectra are dominated by the hypersensitive 5D0→7F2 transition. Eu3+ ions are incorporated in a highly asymmetric environment. PL emission at 541 nm is the most intense in ZnO:Tb3+. Judd-Ofelt intensity parameters rise with increasing Eu3+ concentration, up to Ω2 = 7.8·10−42 cm2 and Ω4 = 4.4·10−42 cm2. Radiative lifetime of 5D0 level drops to 1.12 ms. Chromaticity of PL varies with concentration only when the samples are irradiated by UV light, from white to orange-red or green for Eu3+ or Tb3+ doped samples, respectively. Eu3+ under 394 nm and 464 nm irradiation gives 99.5% color-purity. © 2021 Elsevier B.V.",
journal = "Journal of Luminescence",
title = "Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate",
volume = "235",
pages = "118022",
doi = "10.1016/j.jlumin.2021.118022"
}
Stojadinović, S.,& Ćirić, A.. (2021). Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate. in Journal of Luminescence, 235, 118022.
https://doi.org/10.1016/j.jlumin.2021.118022
Stojadinović S, Ćirić A. Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate. in Journal of Luminescence. 2021;235:118022.
doi:10.1016/j.jlumin.2021.118022 .
Stojadinović, Stevan, Ćirić, Aleksandar, "Photoluminescence of ZnO:Eu3+ and ZnO:Tb3+ coatings formed by plasma electrolytic oxidation of pure zinc substrate" in Journal of Luminescence, 235 (2021):118022,
https://doi.org/10.1016/j.jlumin.2021.118022 . .

Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs

Kuveljić, Jovana; Đurić, Tamara; Stanković, Goran; Dekleva, Milica; Stanković, Aleksandra; Alavantić, Dragan; Živković, Maja

(2021)

TY  - JOUR
AU  - Kuveljić, Jovana
AU  - Đurić, Tamara
AU  - Stanković, Goran
AU  - Dekleva, Milica
AU  - Stanković, Aleksandra
AU  - Alavantić, Dragan
AU  - Živković, Maja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9541
AB  - Background: Myocardial infarction (MI) and underlining atherosclerosis are the main causes of death worldwide. Phosphatase and actin regulator 1 (PHACTR1) variants have been associated with early onset MI, coronary artery disease and carotid dissection. PHACTR1 mRNA expression has been detected in tissues and cells related to atherosclerosis. Nonetheless, the true effect of PHACTR1 on vascular diseases is still unknown. Our aim was to examine the association of PHACTR1 intronic variants, rs9349379, rs2026458 and rs2876300, with MI and multi-vessel disease (MVD) and to assess their effect on PHACTR1 and EDN1 mRNA expression in PBMCs of patients six months after MI. Methods: The study enrolled 537 patients with the first MI and 310 controls. Gene expression was assessed in 74 patients six months after MI and 37 healthy controls. Rs9349379, rs2026458, rs2876300 and relative mRNA expressions were detected by TaqMan® technology. Results: The significant association between PHACTR1 variants and MI was not found, either individually or in haplotype. A higher frequency of rs2876300G-allele in MVD was rendered not significant after Bonferroni correction. PHACTR1 mRNA was significantly increased in PBMCs of patients six months after MI compared to controls (p = 0.02). Patients that carry ACG haplotype have increased PHACTR1 mRNA expression in PBMCs (p = 0.04). There was no effect of PHACTR1 variants on EDN1 mRNA expression. Conclusion: Our findings suggest that PHACTR1 intronic variants may have a role in severity and progression of coronary atherosclerosis. Future research is needed to clarify the mechanism underlying the role of PHACTR1 in coronary atherosclerosis and MI. © 2021 Elsevier B.V.
T2  - Gene
T1  - Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs
VL  - 775
SP  - 145428
DO  - 10.1016/j.gene.2021.145428
ER  - 
@article{
author = "Kuveljić, Jovana and Đurić, Tamara and Stanković, Goran and Dekleva, Milica and Stanković, Aleksandra and Alavantić, Dragan and Živković, Maja",
year = "2021",
abstract = "Background: Myocardial infarction (MI) and underlining atherosclerosis are the main causes of death worldwide. Phosphatase and actin regulator 1 (PHACTR1) variants have been associated with early onset MI, coronary artery disease and carotid dissection. PHACTR1 mRNA expression has been detected in tissues and cells related to atherosclerosis. Nonetheless, the true effect of PHACTR1 on vascular diseases is still unknown. Our aim was to examine the association of PHACTR1 intronic variants, rs9349379, rs2026458 and rs2876300, with MI and multi-vessel disease (MVD) and to assess their effect on PHACTR1 and EDN1 mRNA expression in PBMCs of patients six months after MI. Methods: The study enrolled 537 patients with the first MI and 310 controls. Gene expression was assessed in 74 patients six months after MI and 37 healthy controls. Rs9349379, rs2026458, rs2876300 and relative mRNA expressions were detected by TaqMan® technology. Results: The significant association between PHACTR1 variants and MI was not found, either individually or in haplotype. A higher frequency of rs2876300G-allele in MVD was rendered not significant after Bonferroni correction. PHACTR1 mRNA was significantly increased in PBMCs of patients six months after MI compared to controls (p = 0.02). Patients that carry ACG haplotype have increased PHACTR1 mRNA expression in PBMCs (p = 0.04). There was no effect of PHACTR1 variants on EDN1 mRNA expression. Conclusion: Our findings suggest that PHACTR1 intronic variants may have a role in severity and progression of coronary atherosclerosis. Future research is needed to clarify the mechanism underlying the role of PHACTR1 in coronary atherosclerosis and MI. © 2021 Elsevier B.V.",
journal = "Gene",
title = "Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs",
volume = "775",
pages = "145428",
doi = "10.1016/j.gene.2021.145428"
}
Kuveljić, J., Đurić, T., Stanković, G., Dekleva, M., Stanković, A., Alavantić, D.,& Živković, M.. (2021). Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs. in Gene, 775, 145428.
https://doi.org/10.1016/j.gene.2021.145428
Kuveljić J, Đurić T, Stanković G, Dekleva M, Stanković A, Alavantić D, Živković M. Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs. in Gene. 2021;775:145428.
doi:10.1016/j.gene.2021.145428 .
Kuveljić, Jovana, Đurić, Tamara, Stanković, Goran, Dekleva, Milica, Stanković, Aleksandra, Alavantić, Dragan, Živković, Maja, "Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs" in Gene, 775 (2021):145428,
https://doi.org/10.1016/j.gene.2021.145428 . .