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

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 sol...

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Bibliographic Details
Published in:Nanoscale 2024-04, Vol.16 (16), p.7958-7964
Main Authors: Parker, Megan A, De Marco, Maria Letizia, Castro-Grijalba, Alexander, Ghoridi, Anissa, Portehault, David, Pechev, Stanislav, Hillard, Elizabeth A, Lacomme, Sabrina, Bessière, Aurélie, Cunin, Frédérique, Rosa, Patrick, Gonidec, Mathieu, Drisko, Glenna L
Format: Article
Language:English
Subjects:
Ambient temperature
Chemical Sciences
Chemical synthesis
Chemistry
Colloids
Diameters
Liquid phases
Material chemistry
Nanoparticles
Nitrogen
Oxidation
Particle size
Photoluminescence
Redox reactions
Silicides
Silicon
Solvents
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Summary: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( , '-diisopropylbutylamidinato)dichlorosilane, was reduced by a silicon Zintl phase, sodium silicide (Na Si ). 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.
ISSN:2040-3364
2040-3372
DOI:10.1039/d3nr05793c