Issue 16, 2024

Size-tunable silicon nanoparticles synthesized in solution via a redox reaction

Abstract

A current challenge in silicon chemistry is to perform liquid-phase synthesis of silicon nanoparticles, which would permit the use of colloidal synthesis techniques to control size and shape. Herein we show how silicon nanoparticles were synthesized at ambient temperature and pressure in organic solvents through a redox reaction. Specifically, a hexacoordinated silicon complex, bis(N,N′-diisopropylbutylamidinato)dichlorosilane, was reduced by a silicon Zintl phase, sodium silicide (Na4Si4). The resulting silicon nanoparticles were crystalline with sizes tuned from a median particle diameter of 15 nm to 45 nm depending on the solvent. Photoluminescence measurements performed on colloidal suspensions of the 45 nm diameter silicon nanoparticles indicated a blue emission signal, attributed to the partial oxidation of the Si nanocrystals or to the presence of nitrogen impurities.

Graphical abstract: Size-tunable silicon nanoparticles synthesized in solution via a redox reaction

Supplementary files

Article information

Article type
Paper
Submitted
14 noy 2023
Accepted
29 fev 2024
First published
02 apr 2024
This article is Open Access
Creative Commons BY-NC license

Nanoscale, 2024,16, 7958-7964

Size-tunable silicon nanoparticles synthesized in solution via a redox reaction

M. A. Parker, M. L. De Marco, A. Castro-Grijalba, A. Ghoridi, D. Portehault, S. Pechev, E. A. Hillard, S. Lacomme, A. Bessière, F. Cunin, P. Rosa, M. Gonidec and G. L. Drisko, Nanoscale, 2024, 16, 7958 DOI: 10.1039/D3NR05793C

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