Nano Archive

A new solution route to hydrogen-terminated silicon nanoparticles: synthesis, functionalization and water stability

Zhang, Xiaoming and Neiner, Doinita and Wang, Shizhong and Louie, Angelique Y. and Kauzlarich, Susan M. (2007) A new solution route to hydrogen-terminated silicon nanoparticles: synthesis, functionalization and water stability. NANOTECHNOLOGY, 18 (9). ISSN 0957-4484 (Print); 1361-6528 (Online)

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Official URL: http://www.iop.org/EJ/abstract/0957-4484/18/9/0956...

Abstract

Hydrogen-capped silicon nanoparticles with strong blue photoluminescence were synthesized by the metathesis reaction of sodium silicide, NaSi, with NH4Br. The hydrogen-capped Si nanoparticles were further terminated with octyl groups and then coated with a polymer to render them water-soluble. The nanoparticles were characterized by TEM, FT-IR, UV-vis absorption and photoluminescence. The Si nanoparticles were shown to have an average diameter of 3.9 +/- 1.3 nm and exhibited room temperature photoluminescence with a peak maximum at 438 nm with a quantum efficiency of 32% in hexane and 18% in water; the emission was stable in ambient air for up to 2 months. These nanoparticles could hold great potential as a non-heavy-element-containing quantum dot for applications in biology.

Item Type:Article
Subjects:Material Science > Nanofabrication processes and tools
ID Code:2195
Deposited By:M T V
Deposited On:22 Dec 2008 15:17
Last Modified:22 Dec 2008 15:17

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