Photonics of shungite quantum dots

Shungite quantum dots are associated with nanosize fragments of reduced graphene oxide similarly to synthetic graphene quantum dots thus forming a common class of graphene quantum dots (GQDs). Colloidal dispersions of powdered shungite in water, carbon tetrachloride, and toluene form the ground for the GQD photonic peculiarities manifestation. Morphological study shows a steady trend of GQDs to form fractals and a drastic change in the colloids fractal structure caused by solvent was reliably established. Spectral study reveals a dual character of emitting centers: individual GQDs are responsible for the spectra position while the fractal structure of GQD colloids provides high broadening of the spectra due to structural inhomogeneity of the colloidal dispersions and a peculiar dependence on excitation wavelength. For the first time, photoluminescence spectra of individual GQDs were observed in frozen toluene dispersions which pave the way for a theoretical treatment of GQD photonics. © 2016 by Taylor and Francis Group, LLC.

Авторы
Razbirin B.S.1 , Rozhkova N.N.2 , Sheka E.F. 3
Редакторы
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Издательство
CRC Press
Номер выпуска
-
Язык
Английский
Страницы
425-437
Статус
Опубликовано
Подразделение
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Ссылка
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DOI
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Номер
-
Том
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Год
2016
Организации
  • 1 Ioffe Physical-Technical Institute, RAS, St. Petersburg, Russian Federation
  • 2 Institute of Geology Karelian Research Centre RAS, Petrozavodsk, Russian Federation
  • 3 People's Friendship University of Russia, Moscow, Russian Federation
Ключевые слова
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Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3954/