Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Size-dependent photoluminescence of europium in alumina nanoparticles synthesized by cw CO2 laser vaporization. / Kostyukov, Anton I.; Snytnikov, Vladimir N.; Zhuzhgov, Aleksey V. и др.
в: Journal of Alloys and Compounds, Том 815, 152476, 30.01.2020.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Size-dependent photoluminescence of europium in alumina nanoparticles synthesized by cw CO2 laser vaporization
AU - Kostyukov, Anton I.
AU - Snytnikov, Vladimir N.
AU - Zhuzhgov, Aleksey V.
AU - Cherepanova, Svetlana V.
AU - Ishchenko, Arcady V.
AU - Baronskiy, Mark G.
AU - Snytnikov, Vladimir N.
N1 - Funding Information: The study was supported by the Russian Foundation for Basic Research , Project No. 18-03-00087 A , and by the basic budgetary funding ( Boreskov Institute of Catalysis SB RAS ). Publisher Copyright: © 2019 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/1/30
Y1 - 2020/1/30
N2 - Nanosized Eu/γ- and/or η-Al2O3 ([Eu2О3] = 0.00, 0.02, 0.45 and 0.92 wt%) powders with the particle size from <10 nm to 21 nm synthesized by cw CO2 laser vaporization were studied. It was shown that photoluminescence (PL) properties of the obtained samples are caused by luminescence of the Eu3+ and Eu2+ ions incorporated to the Al2O3 matrix in crystallographic positions with the C3v local symmetry. A scheme based on the formation of Eu2+ ions in the Al2O3 lattice via the charge compensation by oxygen vacancies (F centers) located in the first coordination sphere of europium was proposed. The influence of size effects on PL of Eu/Al2O3 nanoparticles consists first of all in shortening the lifetime of 4f – 4f transitions in Eu3+ ions as a result of increased probability of nonradiative relaxation owing to OH groups and various structural defects. It was found that the conditions of laser vaporization (gas composition and pressure) can change the structure of the resulting Eu/Al2O3 nanoparticles.
AB - Nanosized Eu/γ- and/or η-Al2O3 ([Eu2О3] = 0.00, 0.02, 0.45 and 0.92 wt%) powders with the particle size from <10 nm to 21 nm synthesized by cw CO2 laser vaporization were studied. It was shown that photoluminescence (PL) properties of the obtained samples are caused by luminescence of the Eu3+ and Eu2+ ions incorporated to the Al2O3 matrix in crystallographic positions with the C3v local symmetry. A scheme based on the formation of Eu2+ ions in the Al2O3 lattice via the charge compensation by oxygen vacancies (F centers) located in the first coordination sphere of europium was proposed. The influence of size effects on PL of Eu/Al2O3 nanoparticles consists first of all in shortening the lifetime of 4f – 4f transitions in Eu3+ ions as a result of increased probability of nonradiative relaxation owing to OH groups and various structural defects. It was found that the conditions of laser vaporization (gas composition and pressure) can change the structure of the resulting Eu/Al2O3 nanoparticles.
KW - Defects
KW - Laser vaporization
KW - Nanosized AlO
KW - Photoluminescence of Eu and Eu
KW - OPTICAL-PROPERTIES
KW - EU3+
KW - LUMINESCENCE PROPERTIES
KW - IONS
KW - Nanosized Al2O3
KW - GAMMA-ALUMINA
KW - Photoluminescence of Eu3+ and Eu2+
KW - RARE-EARTH
KW - LASER SPECTROSCOPY
KW - CHARGE-TRANSFER ENERGY
KW - NANOCRYSTALLINE EU2O3
KW - SPECTRA
UR - http://www.scopus.com/inward/record.url?scp=85072755711&partnerID=8YFLogxK
U2 - 10.1016/j.jallcom.2019.152476
DO - 10.1016/j.jallcom.2019.152476
M3 - Article
AN - SCOPUS:85072755711
VL - 815
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
M1 - 152476
ER -
ID: 21792444