Dražić, Goran

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  • Dražić, Goran (8)
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Author's Bibliography

Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles

Milićević, Bojana R.; Đorđević, Vesna R.; Vuković, Katarina; Dražić, Goran; Dramićanin, Miroslav

(2017)

TY  - JOUR
AU  - Milićević, Bojana R.
AU  - Đorđević, Vesna R.
AU  - Vuković, Katarina
AU  - Dražić, Goran
AU  - Dramićanin, Miroslav
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1799
AB  - Sol-gel technique for the synthesis of anatase TiO2 at 420 degrees C produces nanocrystals of 10-20 nm in size with Ti4+ in crystal volume and Ti3+ at terminal planes of the crystal. The study of Li+ co-doping effects on the structure, morphology, absorption, and luminescence of Eu3+ activated TiO2 anatase nanocrystals is presented. Pure anatase structure is achieved up to 9 at.% Li, with significant improvement in crystallinity of europium doped anatase TiO2. The Li+ co-doping reduces the unit cell volume of the crystal, induces the blue shift of the absorption edge, lengthens the lifetime of Eu3+ D-5(0) excited state, and improves the Eu3+ emission intensity up to 37.5%. Judd-Ofelt analysis of Eu3+ emission showed enhancement of quantum efficiency from 66.4% to 98.7% when TiO2:Eu3+ was co-doped with 9 at.% of Li. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Optical Materials
T1  - Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles
VL  - 72
SP  - 316
EP  - 322
DO  - 10.1016/j.optmat.2017.06.029
ER  - 
@article{
author = "Milićević, Bojana R. and Đorđević, Vesna R. and Vuković, Katarina and Dražić, Goran and Dramićanin, Miroslav",
year = "2017",
abstract = "Sol-gel technique for the synthesis of anatase TiO2 at 420 degrees C produces nanocrystals of 10-20 nm in size with Ti4+ in crystal volume and Ti3+ at terminal planes of the crystal. The study of Li+ co-doping effects on the structure, morphology, absorption, and luminescence of Eu3+ activated TiO2 anatase nanocrystals is presented. Pure anatase structure is achieved up to 9 at.% Li, with significant improvement in crystallinity of europium doped anatase TiO2. The Li+ co-doping reduces the unit cell volume of the crystal, induces the blue shift of the absorption edge, lengthens the lifetime of Eu3+ D-5(0) excited state, and improves the Eu3+ emission intensity up to 37.5%. Judd-Ofelt analysis of Eu3+ emission showed enhancement of quantum efficiency from 66.4% to 98.7% when TiO2:Eu3+ was co-doped with 9 at.% of Li. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Optical Materials",
title = "Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles",
volume = "72",
pages = "316-322",
doi = "10.1016/j.optmat.2017.06.029"
}
Milićević, B. R., Đorđević, V. R., Vuković, K., Dražić, G.,& Dramićanin, M.. (2017). Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles. in Optical Materials, 72, 316-322.
https://doi.org/10.1016/j.optmat.2017.06.029
Milićević BR, Đorđević VR, Vuković K, Dražić G, Dramićanin M. Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles. in Optical Materials. 2017;72:316-322.
doi:10.1016/j.optmat.2017.06.029 .
Milićević, Bojana R., Đorđević, Vesna R., Vuković, Katarina, Dražić, Goran, Dramićanin, Miroslav, "Effects of Li+ co-doping on properties of Eu3+ activated TiO2 anatase nanoparticles" in Optical Materials, 72 (2017):316-322,
https://doi.org/10.1016/j.optmat.2017.06.029 . .
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12

Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy

del Rosal, Blanca; Perez-Delgado, Alberto; Carrasco, Elisa; Jovanović, Dragana J.; Dramićanin, Miroslav; Dražić, Goran; Juarranz de la Fuente, Angeles; Sanz-Rodriguez, Francisco; Jaque, Daniel

(2016)

TY  - JOUR
AU  - del Rosal, Blanca
AU  - Perez-Delgado, Alberto
AU  - Carrasco, Elisa
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
AU  - Dražić, Goran
AU  - Juarranz de la Fuente, Angeles
AU  - Sanz-Rodriguez, Francisco
AU  - Jaque, Daniel
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9686
AB  - Nanoparticle-mediated photothermal therapy (NP-PTT) constitutes a flexible, highly selective, cost effective, and accurate tool for cancer treatment alone or in combination with other therapies such as radiotherapy or chemotherapy. The future application of NP-PTT in real life mainly depends on the design and synthesis of novel multifunctional nanoparticles that could overcome the current limitations of NP-PTT such as limited penetration depth and absence of therapy control. In this work, ultrasmall (approximate to 2.4 nm) NdVO4 stoichiometric (100% constituent Nd3+ ions) nanoparticles are reported, which are capable of in vivo sub-tissue localized heating under 808 nm optical excitation while providing, simultaneously, the possibility of high penetration near-infrared fluorescence imaging. Ultrasmall stoichiometric NdVO4 nanoparticles have evidenced a superior light-to-heat conversion efficiency. This is explained in terms of their large absorption cross-section at 808 nm (consequence of the particular spectroscopic properties of neodymium ions in NdVO4 and of the high neodymium content) as well as to their ultrasmall size that leads to large nonradiative decay rates. Results included in this work introduce ultrasmall, NdVO4 stoichiometric nanoparticles to the scientific community as multifunctional photothermal agents that could be considered as an alternative to traditional systems such as metallic, organic, or carbon-based nanoparticles.
T2  - Advanced Optical Materials
T1  - Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy
VL  - 4
IS  - 5
SP  - 782
EP  - 789
DO  - 10.1002/adom.201500726
ER  - 
@article{
author = "del Rosal, Blanca and Perez-Delgado, Alberto and Carrasco, Elisa and Jovanović, Dragana J. and Dramićanin, Miroslav and Dražić, Goran and Juarranz de la Fuente, Angeles and Sanz-Rodriguez, Francisco and Jaque, Daniel",
year = "2016",
abstract = "Nanoparticle-mediated photothermal therapy (NP-PTT) constitutes a flexible, highly selective, cost effective, and accurate tool for cancer treatment alone or in combination with other therapies such as radiotherapy or chemotherapy. The future application of NP-PTT in real life mainly depends on the design and synthesis of novel multifunctional nanoparticles that could overcome the current limitations of NP-PTT such as limited penetration depth and absence of therapy control. In this work, ultrasmall (approximate to 2.4 nm) NdVO4 stoichiometric (100% constituent Nd3+ ions) nanoparticles are reported, which are capable of in vivo sub-tissue localized heating under 808 nm optical excitation while providing, simultaneously, the possibility of high penetration near-infrared fluorescence imaging. Ultrasmall stoichiometric NdVO4 nanoparticles have evidenced a superior light-to-heat conversion efficiency. This is explained in terms of their large absorption cross-section at 808 nm (consequence of the particular spectroscopic properties of neodymium ions in NdVO4 and of the high neodymium content) as well as to their ultrasmall size that leads to large nonradiative decay rates. Results included in this work introduce ultrasmall, NdVO4 stoichiometric nanoparticles to the scientific community as multifunctional photothermal agents that could be considered as an alternative to traditional systems such as metallic, organic, or carbon-based nanoparticles.",
journal = "Advanced Optical Materials",
title = "Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy",
volume = "4",
number = "5",
pages = "782-789",
doi = "10.1002/adom.201500726"
}
del Rosal, B., Perez-Delgado, A., Carrasco, E., Jovanović, D. J., Dramićanin, M., Dražić, G., Juarranz de la Fuente, A., Sanz-Rodriguez, F.,& Jaque, D.. (2016). Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy. in Advanced Optical Materials, 4(5), 782-789.
https://doi.org/10.1002/adom.201500726
del Rosal B, Perez-Delgado A, Carrasco E, Jovanović DJ, Dramićanin M, Dražić G, Juarranz de la Fuente A, Sanz-Rodriguez F, Jaque D. Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy. in Advanced Optical Materials. 2016;4(5):782-789.
doi:10.1002/adom.201500726 .
del Rosal, Blanca, Perez-Delgado, Alberto, Carrasco, Elisa, Jovanović, Dragana J., Dramićanin, Miroslav, Dražić, Goran, Juarranz de la Fuente, Angeles, Sanz-Rodriguez, Francisco, Jaque, Daniel, "Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy" in Advanced Optical Materials, 4, no. 5 (2016):782-789,
https://doi.org/10.1002/adom.201500726 . .
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Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy

del Rosal, Blanca; Perez-Delgado, Alberto; Carrasco, Elisa; Jovanović, Dragana J.; Dramićanin, Miroslav; Dražić, Goran; Juarranz de la Fuente, Angeles; Sanz-Rodriguez, Francisco; Jaque, Daniel

(2016)

TY  - JOUR
AU  - del Rosal, Blanca
AU  - Perez-Delgado, Alberto
AU  - Carrasco, Elisa
AU  - Jovanović, Dragana J.
AU  - Dramićanin, Miroslav
AU  - Dražić, Goran
AU  - Juarranz de la Fuente, Angeles
AU  - Sanz-Rodriguez, Francisco
AU  - Jaque, Daniel
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1113
AB  - Nanoparticle-mediated photothermal therapy (NP-PTT) constitutes a flexible, highly selective, cost effective, and accurate tool for cancer treatment alone or in combination with other therapies such as radiotherapy or chemotherapy. The future application of NP-PTT in real life mainly depends on the design and synthesis of novel multifunctional nanoparticles that could overcome the current limitations of NP-PTT such as limited penetration depth and absence of therapy control. In this work, ultrasmall (approximate to 2.4 nm) NdVO4 stoichiometric (100% constituent Nd3+ ions) nanoparticles are reported, which are capable of in vivo sub-tissue localized heating under 808 nm optical excitation while providing, simultaneously, the possibility of high penetration near-infrared fluorescence imaging. Ultrasmall stoichiometric NdVO4 nanoparticles have evidenced a superior light-to-heat conversion efficiency. This is explained in terms of their large absorption cross-section at 808 nm (consequence of the particular spectroscopic properties of neodymium ions in NdVO4 and of the high neodymium content) as well as to their ultrasmall size that leads to large nonradiative decay rates. Results included in this work introduce ultrasmall, NdVO4 stoichiometric nanoparticles to the scientific community as multifunctional photothermal agents that could be considered as an alternative to traditional systems such as metallic, organic, or carbon-based nanoparticles.
T2  - Advanced Optical Materials
T1  - Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy
VL  - 4
IS  - 5
SP  - 782
EP  - 789
DO  - 10.1002/adom.201500726
ER  - 
@article{
author = "del Rosal, Blanca and Perez-Delgado, Alberto and Carrasco, Elisa and Jovanović, Dragana J. and Dramićanin, Miroslav and Dražić, Goran and Juarranz de la Fuente, Angeles and Sanz-Rodriguez, Francisco and Jaque, Daniel",
year = "2016",
abstract = "Nanoparticle-mediated photothermal therapy (NP-PTT) constitutes a flexible, highly selective, cost effective, and accurate tool for cancer treatment alone or in combination with other therapies such as radiotherapy or chemotherapy. The future application of NP-PTT in real life mainly depends on the design and synthesis of novel multifunctional nanoparticles that could overcome the current limitations of NP-PTT such as limited penetration depth and absence of therapy control. In this work, ultrasmall (approximate to 2.4 nm) NdVO4 stoichiometric (100% constituent Nd3+ ions) nanoparticles are reported, which are capable of in vivo sub-tissue localized heating under 808 nm optical excitation while providing, simultaneously, the possibility of high penetration near-infrared fluorescence imaging. Ultrasmall stoichiometric NdVO4 nanoparticles have evidenced a superior light-to-heat conversion efficiency. This is explained in terms of their large absorption cross-section at 808 nm (consequence of the particular spectroscopic properties of neodymium ions in NdVO4 and of the high neodymium content) as well as to their ultrasmall size that leads to large nonradiative decay rates. Results included in this work introduce ultrasmall, NdVO4 stoichiometric nanoparticles to the scientific community as multifunctional photothermal agents that could be considered as an alternative to traditional systems such as metallic, organic, or carbon-based nanoparticles.",
journal = "Advanced Optical Materials",
title = "Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy",
volume = "4",
number = "5",
pages = "782-789",
doi = "10.1002/adom.201500726"
}
del Rosal, B., Perez-Delgado, A., Carrasco, E., Jovanović, D. J., Dramićanin, M., Dražić, G., Juarranz de la Fuente, A., Sanz-Rodriguez, F.,& Jaque, D.. (2016). Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy. in Advanced Optical Materials, 4(5), 782-789.
https://doi.org/10.1002/adom.201500726
del Rosal B, Perez-Delgado A, Carrasco E, Jovanović DJ, Dramićanin M, Dražić G, Juarranz de la Fuente A, Sanz-Rodriguez F, Jaque D. Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy. in Advanced Optical Materials. 2016;4(5):782-789.
doi:10.1002/adom.201500726 .
del Rosal, Blanca, Perez-Delgado, Alberto, Carrasco, Elisa, Jovanović, Dragana J., Dramićanin, Miroslav, Dražić, Goran, Juarranz de la Fuente, Angeles, Sanz-Rodriguez, Francisco, Jaque, Daniel, "Neodymium-Based Stoichiometric Ultrasmall Nanoparticles for Multifunctional Deep-Tissue Photothermal Therapy" in Advanced Optical Materials, 4, no. 5 (2016):782-789,
https://doi.org/10.1002/adom.201500726 . .
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Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives

Medić, Mina M.; Vasić, Marija; Zarubica, Aleksandra R.; Trandafilović, Lidija V.; Dražić, Goran; Dramićanin, Miroslav; Nedeljković, Jovan

(2016)

TY  - JOUR
AU  - Medić, Mina M.
AU  - Vasić, Marija
AU  - Zarubica, Aleksandra R.
AU  - Trandafilović, Lidija V.
AU  - Dražić, Goran
AU  - Dramićanin, Miroslav
AU  - Nedeljković, Jovan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1278
AB  - Magnesium-orthotitanate (Mg2TiO4) nano-powder was synthesized using a Pechini-type polymerized complex route. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that well-crystallized Mg2TiO4 nanoparticles are small in size (about 10 nm) with large specific surface area (72 m(2) g(-1)). The surface modification of Mg2TiO4 nano-powders with 5-amino salicylic acid and catechol induced a significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of Mg2TiO4 nano-powders have never been reported in the literature. Degradation reactions of an organic dye (crystal violet) were used to test the photocatalytic ability of pristine and surface-modified Mg2TiO4 nano-powders under illumination in different spectral regions. Excitation with UV light indicated, for the first time, photocatalytic ability of Mg2TiO4. Also, improved photocatalytic performance of surface-modified Mg2TiO4 nano-powders was found in comparison to unmodified ones.
T2  - RSC Advances
T1  - Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives
VL  - 6
IS  - 97
SP  - 94780
EP  - 94786
DO  - 10.1039/c6ra16284c
ER  - 
@article{
author = "Medić, Mina M. and Vasić, Marija and Zarubica, Aleksandra R. and Trandafilović, Lidija V. and Dražić, Goran and Dramićanin, Miroslav and Nedeljković, Jovan",
year = "2016",
abstract = "Magnesium-orthotitanate (Mg2TiO4) nano-powder was synthesized using a Pechini-type polymerized complex route. Microstructural characterization involving transmission electron microscopy, X-ray diffraction analysis and nitrogen adsorption-desorption isotherms indicated that well-crystallized Mg2TiO4 nanoparticles are small in size (about 10 nm) with large specific surface area (72 m(2) g(-1)). The surface modification of Mg2TiO4 nano-powders with 5-amino salicylic acid and catechol induced a significant shift of absorption to the visible spectral region due to charge transfer complex formation. It should be emphasized that tunable optical properties of Mg2TiO4 nano-powders have never been reported in the literature. Degradation reactions of an organic dye (crystal violet) were used to test the photocatalytic ability of pristine and surface-modified Mg2TiO4 nano-powders under illumination in different spectral regions. Excitation with UV light indicated, for the first time, photocatalytic ability of Mg2TiO4. Also, improved photocatalytic performance of surface-modified Mg2TiO4 nano-powders was found in comparison to unmodified ones.",
journal = "RSC Advances",
title = "Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives",
volume = "6",
number = "97",
pages = "94780-94786",
doi = "10.1039/c6ra16284c"
}
Medić, M. M., Vasić, M., Zarubica, A. R., Trandafilović, L. V., Dražić, G., Dramićanin, M.,& Nedeljković, J.. (2016). Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives. in RSC Advances, 6(97), 94780-94786.
https://doi.org/10.1039/c6ra16284c
Medić MM, Vasić M, Zarubica AR, Trandafilović LV, Dražić G, Dramićanin M, Nedeljković J. Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives. in RSC Advances. 2016;6(97):94780-94786.
doi:10.1039/c6ra16284c .
Medić, Mina M., Vasić, Marija, Zarubica, Aleksandra R., Trandafilović, Lidija V., Dražić, Goran, Dramićanin, Miroslav, Nedeljković, Jovan, "Enhanced photoredox chemistry in surface-modified Mg2TiO4 nano-powders with bidentate benzene derivatives" in RSC Advances, 6, no. 97 (2016):94780-94786,
https://doi.org/10.1039/c6ra16284c . .
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Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles

Medić, Mina M.; Brik, Mikhail G.; Dražić, Goran; Antić, Željka; Lojpur, Vesna; Dramićanin, Miroslav

(2015)

TY  - JOUR
AU  - Medić, Mina M.
AU  - Brik, Mikhail G.
AU  - Dražić, Goran
AU  - Antić, Željka
AU  - Lojpur, Vesna
AU  - Dramićanin, Miroslav
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/351
T2  - Journal of Physical Chemistry. C
T1  - Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles
VL  - 119
IS  - 1
SP  - 724
EP  - 730
DO  - 10.1021/jp5095646
ER  - 
@article{
author = "Medić, Mina M. and Brik, Mikhail G. and Dražić, Goran and Antić, Željka and Lojpur, Vesna and Dramićanin, Miroslav",
year = "2015",
journal = "Journal of Physical Chemistry. C",
title = "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles",
volume = "119",
number = "1",
pages = "724-730",
doi = "10.1021/jp5095646"
}
Medić, M. M., Brik, M. G., Dražić, G., Antić, Ž., Lojpur, V.,& Dramićanin, M.. (2015). Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C, 119(1), 724-730.
https://doi.org/10.1021/jp5095646
Medić MM, Brik MG, Dražić G, Antić Ž, Lojpur V, Dramićanin M. Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles. in Journal of Physical Chemistry. C. 2015;119(1):724-730.
doi:10.1021/jp5095646 .
Medić, Mina M., Brik, Mikhail G., Dražić, Goran, Antić, Željka, Lojpur, Vesna, Dramićanin, Miroslav, "Deep-Red Emitting Mn4+ Doped Mg2TiO4 Nanoparticles" in Journal of Physical Chemistry. C, 119, no. 1 (2015):724-730,
https://doi.org/10.1021/jp5095646 . .
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High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers

Milosavljević, Momir; Obradović, Marko O.; Grce, Ana; Peruško, Davor; Pjević, Dejan J.; Kovač, Janez; Dražić, Goran; Jeynes, Chris

(2013)

TY  - JOUR
AU  - Milosavljević, Momir
AU  - Obradović, Marko O.
AU  - Grce, Ana
AU  - Peruško, Davor
AU  - Pjević, Dejan J.
AU  - Kovač, Janez
AU  - Dražić, Goran
AU  - Jeynes, Chris
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7006
AB  - The effects of high dose Ar ion irradiation on immiscible AlN/TiN multilayered structures were studied. The structures with 30 alternate layers of a total thickness of similar to 260 nm were deposited by reactive sputtering on (100) Si wafers. Individual layer thickness was similar to 8 nm AlN and similar to 9.3 nm TiN. Irradiation was done with 180 keV Ar+ ions to 1x10(16)-8x10(16) ions/cm(2), with the projected range around mid-depth of the structures. It was found that the highest applied dose induced a considerable intermixing, where the growing TiN grains consume the adjacent AlN layers, transforming partly to (TiAl)N phase. Intermixing occurs due to a high contribution of collision cascades, which was not compensated in demixing by chemical driving forces. However, a multilayered structure with relatively flat surface and interfaces is still preserved, with measured nano-hardness value above the level for the as-deposited sample. The results are compared to other systems and discussed in the light of the existing ion beam mixing models. They can be interesting towards better understanding of the processes involved and to development of radiation tolerant coatings. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Thin Solid Films
T1  - High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers
VL  - 544
SP  - 562
EP  - 566
DO  - 10.1016/j.tsf.2012.12.068
ER  - 
@article{
author = "Milosavljević, Momir and Obradović, Marko O. and Grce, Ana and Peruško, Davor and Pjević, Dejan J. and Kovač, Janez and Dražić, Goran and Jeynes, Chris",
year = "2013",
abstract = "The effects of high dose Ar ion irradiation on immiscible AlN/TiN multilayered structures were studied. The structures with 30 alternate layers of a total thickness of similar to 260 nm were deposited by reactive sputtering on (100) Si wafers. Individual layer thickness was similar to 8 nm AlN and similar to 9.3 nm TiN. Irradiation was done with 180 keV Ar+ ions to 1x10(16)-8x10(16) ions/cm(2), with the projected range around mid-depth of the structures. It was found that the highest applied dose induced a considerable intermixing, where the growing TiN grains consume the adjacent AlN layers, transforming partly to (TiAl)N phase. Intermixing occurs due to a high contribution of collision cascades, which was not compensated in demixing by chemical driving forces. However, a multilayered structure with relatively flat surface and interfaces is still preserved, with measured nano-hardness value above the level for the as-deposited sample. The results are compared to other systems and discussed in the light of the existing ion beam mixing models. They can be interesting towards better understanding of the processes involved and to development of radiation tolerant coatings. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Thin Solid Films",
title = "High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers",
volume = "544",
pages = "562-566",
doi = "10.1016/j.tsf.2012.12.068"
}
Milosavljević, M., Obradović, M. O., Grce, A., Peruško, D., Pjević, D. J., Kovač, J., Dražić, G.,& Jeynes, C.. (2013). High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers. in Thin Solid Films, 544, 562-566.
https://doi.org/10.1016/j.tsf.2012.12.068
Milosavljević M, Obradović MO, Grce A, Peruško D, Pjević DJ, Kovač J, Dražić G, Jeynes C. High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers. in Thin Solid Films. 2013;544:562-566.
doi:10.1016/j.tsf.2012.12.068 .
Milosavljević, Momir, Obradović, Marko O., Grce, Ana, Peruško, Davor, Pjević, Dejan J., Kovač, Janez, Dražić, Goran, Jeynes, Chris, "High dose ion irradiation effects on immiscible AlN/TiN nano-scaled multilayers" in Thin Solid Films, 544 (2013):562-566,
https://doi.org/10.1016/j.tsf.2012.12.068 . .
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Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers

Milosavljević, Momir; Toprek, Dragan; Obradović, Marko O.; Grce, Ana; Peruško, Davor; Dražić, Goran; Kovač, Janez; Homewood, Kevin P.

(2013)

TY  - JOUR
AU  - Milosavljević, Momir
AU  - Toprek, Dragan
AU  - Obradović, Marko O.
AU  - Grce, Ana
AU  - Peruško, Davor
AU  - Dražić, Goran
AU  - Kovač, Janez
AU  - Homewood, Kevin P.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5335
AB  - The effects of Ar ion irradiation on interfacial reactions induced in Ni/Ti multilayers were investigated. Structures consisting of 10 alternate Ni (similar to 26 nm) and Ti (similar to 20 nm) layers of a total thickness similar to 230 nm were deposited by ion sputtering on Si (1 0 0) wafers. Argon irradiations were done at 180 keV, to the doses of 1-6 x 10(16) ions/cm(2), the samples being held at room temperature. The projected implanted ion range is 86 +/- 36 nm, maximum energy loss is closer to the surface, and maximum displacements per atom (dpa) from 47 to 284 for Ni and 26 to 156 for Ti. Characterizations of samples were performed by transmission electron microscopy (TEM) and Rutherford backscattering spectrometry (RBS). It is shown that ion irradiation induced a progressed intermixing in the mostly affected zone already for the lowest dose, the thickness of the mix increasing linearly with the irradiation dose. The mixed phase is fully amorphous, starting with a higher concentration of Ni (which is the diffusing species) from the initial stages, and saturating at Ni: Ti similar to 66:34. A thick amorphous layer (similar to 127 nm) formed towards the surface region of the structure for the irradiation dose of 4 x 10(16) ions/cm(2) remains stable with increasing the dose to 6 x 10(16) ions/cm(2), which introduces up to 6-7 at.% of Ar within the mix. The results are discussed in light of the existing models. They can be interesting for introducing a selective and controlled solid-state reaction and towards further studies of ion irradiation stability of amorphous Ni-Ti phase. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers
VL  - 268
SP  - 516
EP  - 523
DO  - 10.1016/j.apsusc.2012.12.158
ER  - 
@article{
author = "Milosavljević, Momir and Toprek, Dragan and Obradović, Marko O. and Grce, Ana and Peruško, Davor and Dražić, Goran and Kovač, Janez and Homewood, Kevin P.",
year = "2013",
abstract = "The effects of Ar ion irradiation on interfacial reactions induced in Ni/Ti multilayers were investigated. Structures consisting of 10 alternate Ni (similar to 26 nm) and Ti (similar to 20 nm) layers of a total thickness similar to 230 nm were deposited by ion sputtering on Si (1 0 0) wafers. Argon irradiations were done at 180 keV, to the doses of 1-6 x 10(16) ions/cm(2), the samples being held at room temperature. The projected implanted ion range is 86 +/- 36 nm, maximum energy loss is closer to the surface, and maximum displacements per atom (dpa) from 47 to 284 for Ni and 26 to 156 for Ti. Characterizations of samples were performed by transmission electron microscopy (TEM) and Rutherford backscattering spectrometry (RBS). It is shown that ion irradiation induced a progressed intermixing in the mostly affected zone already for the lowest dose, the thickness of the mix increasing linearly with the irradiation dose. The mixed phase is fully amorphous, starting with a higher concentration of Ni (which is the diffusing species) from the initial stages, and saturating at Ni: Ti similar to 66:34. A thick amorphous layer (similar to 127 nm) formed towards the surface region of the structure for the irradiation dose of 4 x 10(16) ions/cm(2) remains stable with increasing the dose to 6 x 10(16) ions/cm(2), which introduces up to 6-7 at.% of Ar within the mix. The results are discussed in light of the existing models. They can be interesting for introducing a selective and controlled solid-state reaction and towards further studies of ion irradiation stability of amorphous Ni-Ti phase. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers",
volume = "268",
pages = "516-523",
doi = "10.1016/j.apsusc.2012.12.158"
}
Milosavljević, M., Toprek, D., Obradović, M. O., Grce, A., Peruško, D., Dražić, G., Kovač, J.,& Homewood, K. P.. (2013). Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers. in Applied Surface Science, 268, 516-523.
https://doi.org/10.1016/j.apsusc.2012.12.158
Milosavljević M, Toprek D, Obradović MO, Grce A, Peruško D, Dražić G, Kovač J, Homewood KP. Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers. in Applied Surface Science. 2013;268:516-523.
doi:10.1016/j.apsusc.2012.12.158 .
Milosavljević, Momir, Toprek, Dragan, Obradović, Marko O., Grce, Ana, Peruško, Davor, Dražić, Goran, Kovač, Janez, Homewood, Kevin P., "Ion irradiation induced solid-state amorphous reaction in Ni/Ti multilayers" in Applied Surface Science, 268 (2013):516-523,
https://doi.org/10.1016/j.apsusc.2012.12.158 . .
12
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A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures

Milosavljević, Momir; Grce, Ana; Peruško, Davor; Stojanović, Marko; Kovač, Janez; Dražić, Goran; Didyk, Alexander Yu.; Skuratov, Vladimir A.

(2012)

TY  - JOUR
AU  - Milosavljević, Momir
AU  - Grce, Ana
AU  - Peruško, Davor
AU  - Stojanović, Marko
AU  - Kovač, Janez
AU  - Dražić, Goran
AU  - Didyk, Alexander Yu.
AU  - Skuratov, Vladimir A.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4816
AB  - We have compared the effects of 200 keV Ar-40(1+) ion implantation and 166 MeV Xe-132(27+) ion irradiation on immiscible (AlN/TiN) x 5 multilayers grown on Si(1 0 0) wafers. The layers were deposited by reactive sputtering, individual layer thickness was similar to 22 nm (AlN) and similar to 32 nm (TiN), the stoichiometry Al:N similar to 45:55 and Ti:N similar to 50:50 at%. Argon was implanted to 4 x 10(16) ions cm(-2), and xenon to 5 x 10(14) ions cm(-2). The projected Ar range is around mid depth of the multilayered structure, while swift Xe ions are buried deep into the Si substrate. Upon irradiation the structures remain essentially stable and unmixed; although in both cases we observed detectable effects. The use of wide range of irradiation parameters (S-e/S-n = 1.2-1.4, dpa = 42-63 for Ar; and S-e/S-n = 249-258, dpa = 0.03-0.05 for Xe) enabled to distinguish between the contribution of nuclear and electronic stopping. In case of Ar implantation both atomic collisions and electronic excitations contribute to the induced structural modifications, and in case of Xe only electronic excitations. It was deduced that electronic excitations generate local heating which influences lateral grain growth within individual layers, but no elemental redistribution. On the other hand, atomic collisions facilitate a low level of Ti migration into the under-stoichiometric AlN layers, in the vicinity of the implanted Ar ion range. Energy transfer and temperature distribution were evaluated and compared to the effects produced in the structures. The presented results can be interesting towards developing radiation tolerant materials. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures
VL  - 133
IS  - 2-3
SP  - 884
EP  - 892
DO  - 10.1016/j.matchemphys.2012.01.112
ER  - 
@article{
author = "Milosavljević, Momir and Grce, Ana and Peruško, Davor and Stojanović, Marko and Kovač, Janez and Dražić, Goran and Didyk, Alexander Yu. and Skuratov, Vladimir A.",
year = "2012",
abstract = "We have compared the effects of 200 keV Ar-40(1+) ion implantation and 166 MeV Xe-132(27+) ion irradiation on immiscible (AlN/TiN) x 5 multilayers grown on Si(1 0 0) wafers. The layers were deposited by reactive sputtering, individual layer thickness was similar to 22 nm (AlN) and similar to 32 nm (TiN), the stoichiometry Al:N similar to 45:55 and Ti:N similar to 50:50 at%. Argon was implanted to 4 x 10(16) ions cm(-2), and xenon to 5 x 10(14) ions cm(-2). The projected Ar range is around mid depth of the multilayered structure, while swift Xe ions are buried deep into the Si substrate. Upon irradiation the structures remain essentially stable and unmixed; although in both cases we observed detectable effects. The use of wide range of irradiation parameters (S-e/S-n = 1.2-1.4, dpa = 42-63 for Ar; and S-e/S-n = 249-258, dpa = 0.03-0.05 for Xe) enabled to distinguish between the contribution of nuclear and electronic stopping. In case of Ar implantation both atomic collisions and electronic excitations contribute to the induced structural modifications, and in case of Xe only electronic excitations. It was deduced that electronic excitations generate local heating which influences lateral grain growth within individual layers, but no elemental redistribution. On the other hand, atomic collisions facilitate a low level of Ti migration into the under-stoichiometric AlN layers, in the vicinity of the implanted Ar ion range. Energy transfer and temperature distribution were evaluated and compared to the effects produced in the structures. The presented results can be interesting towards developing radiation tolerant materials. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures",
volume = "133",
number = "2-3",
pages = "884-892",
doi = "10.1016/j.matchemphys.2012.01.112"
}
Milosavljević, M., Grce, A., Peruško, D., Stojanović, M., Kovač, J., Dražić, G., Didyk, A. Yu.,& Skuratov, V. A.. (2012). A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures. in Materials Chemistry and Physics, 133(2-3), 884-892.
https://doi.org/10.1016/j.matchemphys.2012.01.112
Milosavljević M, Grce A, Peruško D, Stojanović M, Kovač J, Dražić G, Didyk AY, Skuratov VA. A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures. in Materials Chemistry and Physics. 2012;133(2-3):884-892.
doi:10.1016/j.matchemphys.2012.01.112 .
Milosavljević, Momir, Grce, Ana, Peruško, Davor, Stojanović, Marko, Kovač, Janez, Dražić, Goran, Didyk, Alexander Yu., Skuratov, Vladimir A., "A comparison of Ar ion implantation and swift heavy Xe ion irradiation effects on immiscible AlN/TiN multilayered nanostructures" in Materials Chemistry and Physics, 133, no. 2-3 (2012):884-892,
https://doi.org/10.1016/j.matchemphys.2012.01.112 . .
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