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This article is cited in 2 scientific papers (total in 2 papers)
Micro- and nanocrystalline, porous, composite semiconductors
Quantum-confinement effect in silicon nanocrystals during their dissolution in model biological fluids
M. B. Gongalskya, U. A. Tsurikovaa, K. A. Gonchara, G. Z. Gvindgiliiiaa, L. A. Osminkinaab a Faculty of Physics, Lomonosov Moscow State University, Moscow, Russia
b Institute for Biological Instrumentation of RAS, Pushchino, Moscow oblast, Russia
Abstract:
In present work, we studied the mechanisms of dissolution of porous silicon nanoparticles (PSi NPs) during their incubation in model liquids, i.e. water and phosphate buffered saline (PBS) at 37$^\circ$ С. The methods of transmission electron microscopy (TEM), photoluminescence (PL) spectroscopy, and Raman spectroscopy were used. According to TEM images, PSi NPs consist of silicon nanocrystals (nc-Si) 2–10 nm in size and pores. It is shown that incubation of PSi NPs in water leads to enhancement of their PL, accompanied by a slight decrease in the size of nc-Si, which is associated with the passivation of defects and stabilization of the oxide shell of nanocrystals. During incubation in PBS, a significant quenching of PL and disappearance Raman signal of the PSi NPs took place. That indicates rapid dissolution of PSi NPs. We presented phenomenological model describing how quantum-confinement effect affects properties of nc-Si during their dissolution.
Keywords:
porous silicon nanoparticles, silicon nanocrystals, quantum confinement effect, photoluminescence, Raman scattering.
Received: 01.09.2020 Revised: 09.09.2020 Accepted: 09.09.2020
Citation:
M. B. Gongalsky, U. A. Tsurikova, K. A. Gonchar, G. Z. Gvindgiliiia, L. A. Osminkina, “Quantum-confinement effect in silicon nanocrystals during their dissolution in model biological fluids”, Fizika i Tekhnika Poluprovodnikov, 55:1 (2021), 43–48; Semiconductors, 55:1 (2021), 61–65
Linking options:
https://www.mathnet.ru/eng/phts5095 https://www.mathnet.ru/eng/phts/v55/i1/p43
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