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20 results on '"Kulpina, Ekaterina"'

7. Reversible Photobleaching of Silver Clusters in Silica‐Based Glass under Ultraviolet Irradiation

Author

Mironov, Leonid Yu., primary, Marasanov, Dmitriy V., additional, Sgibnev, Yevgeniy M., additional, Kulpina, Ekaterina V., additional, Parfenova, Alina D., additional, Slobozhaninov, Artem A., additional, Sannikova, Mariia D., additional, Kharisova, Rufina D., additional, Kolesnikov, Ilya E., additional, Zhizhin, Evgeniy V., additional, and Koroleva, Aleksandra V., additional

Published
2023
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8. Alkali ion effect on phase transition temperatures of CuCl nanocrystals in potassium-alumina-borate glass

Author

Babkina, Anastasiia, Zyryanova, Ksenia, Kulpina, Ekaterina, and Gavrilov, Ruslan

Subjects
температура кристаллизации, галогениды меди, copper halides, crystallization temperature, solid solution, твердый раствор, melting temperature, температура плавления
Abstract

The effect of the Na/K ratio on the phase transition temperatures of CuCl nanocrystals in potassium-aluminaborate glass is studied. The size effect in the location of the exciton absorption is confirmed. By increasing the content of sodium ions in glass, it is possible to increase the melting point of CuCl crystals with a mean size of 3.1 nm from 152 to 168°C. It is assumed that in the matrix of potassium aluminoborate glass, instead of pure CuCl crystals, a CuCl-RCl solid solution crystallizes during the heat treatment., В работе показаны результаты исследования влияния соотношения Na/K на температуры фазовых переходов нанокристаллов CuCl в калиево-алюмоборатном стекле. Подтвержден размерный эффект в месте поглощения экситона. С увеличением содержания ионов натрия в стекле, температура плавления нанокристаллов CuCl среднего размера 3,1 нм увеличивается с 152 до 168°С. Предполагается, что в матрице калиево-алюмоборатного стекла вместо чистых кристаллов CuCl при термообработке кристаллизуется твердый раствор CuCl-RCl.

Published
2023
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13. Temperature effect on spectral properties of cesium lead bromide perovskite nanocrystals in borogermanate glass

Author

Babkina, Anastasiia N., primary, Pavliuk, Aleksandra S., additional, Zyryanova, Ksenia, additional, Kulpina, Ekaterina, additional, Bukhvostov, Andrei, additional, Oreshkina, Kseniia, additional, Dubrovin, Victor, additional, Sgibnev, Yevgeniy, additional, Ignatiev, Alexandre, additional, Nikonorov, Nikolay, additional, and Klinkov, Victor, additional

Published
2021
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19. Antimony concentration effect on luminescent properties of chromium-doped borate glasses.

Author

Kulpina, Ekaterina, Babkina, Anastasiia, Zyryanova, Kseniia, Gorokhovatsky, Yuriy, Temnov, Dmitry, Kapralova, Viktoria, Sudar, Nicolay, and Velichko, Elena

Subjects
*BORATE glass, *ANTIMONY, *LUMINESCENCE spectroscopy, *GLASS-ceramics, *OPTICAL spectra, *CHROMIUM ions, *CHROMIUM oxide
Abstract

This work is devoted to studying the influence of the interrelation of chromium ions with different valences on the spectral and luminescent properties of glass-ceramics obtained by high-temperature heat treatment of the initial glass containing chromium oxide. The optical density spectra and luminescence spectra are obtained for samples with different concentrations of antimony oxide, which plays the role of a reducing agent. Concentration studies of the absorption intensity, lifetime, and luminescence quantum yield are also carried out. [ABSTRACT FROM AUTHOR]

Published
2020
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