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Raman spectroscopy for monitoring the dissolution of silicon nanocrystals in model liquids and living cells

D. E. Maksutova$^1$, U. A. Tsurikova$^1$, M. B. Gongalsky$^1$, Y. V. Evstratova$^{1,2}$, A. A. Kudryavtsev$^{1,2}$, L. A. Osminkina$^{1,3}$

Memoirs of the Faculty of Physics 2021. N 2.

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Annotation

Raman spectroscopy is an informative experimental technique for studying the properties of both solid-state and biological objects. In this work, the Raman scattering method was used to study the dissolution of silicon nanocrystals (nc-Si) during their incubation in phosphate buffered saline (PBS) at 37 ° C, and with BT474 human breast carcinoma cells. Aqueous suspensions of silicon nanoparticles (SiNPs) with a diameter <90 nm were obtained by grinding arrays of porous silicon nanowires. The microphotographs of scanning and transmission electron microscopy show that nanowires and SiNPs consist of small nc-Si and pores. It was shown that incubation of nanoparticles in PBS and in cells results in a low-frequency shift of the maximum and broadening of the Stokes component of the Raman spectrum of SiNPs, the appearance of a signal from the amorphous silicon phase, a decrease in the intensity, and then complete disappearance of the signal, which indicates a decrease in the size, and then a complete dissolution of nc-Si. The results presented in this work are promising for the development of biodegradable drug delivery systems based on SiNPs.

Received: 2020 October 18
Approved: 2021 April 13
PACS:
78.30.-j Infrared and Raman spectra
Rissian citation:
Д. Е. Максутова, У. А. Цурикова, М. Б. Гонгальский, Я. В. Евстратова, А. А. Кудрявцев, Л. А. Осминкина.
Метод спектроскопии комбинационного рассеяния света для мониторинга процесса растворения нанокристаллов кремния в модельных жидкостях и живых клетках.
Учен. зап. физ. фак-та Моск. ун-та. 2021. № 2. 2120501.
Authors
D. E. Maksutova$^1$, U. A. Tsurikova$^1$, M. B. Gongalsky$^1$, Y. V. Evstratova$^{1,2}$, A. A. Kudryavtsev$^{1,2}$, L. A. Osminkina$^{1,3}$
$^1$Faculty of Physics, M.V .Lomonosov Moscow State University
$^2$Institute of Theoretical and Experimental Biophysics RAS
$^3$Institute of Biological Instrumentation RAS
Issue 2, 2021

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