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

A new solution route to hydrogen-terminated silicon nanoparticles: synthesis, functionalization... Hydrogen-capped silicon nanoparticles with strong blue photoluminescencewere synthesized by the metathesis reaction of sodium silicide, NaSi, withNH4Br. The hydrogen-capped Si nanoparticles were further terminated with octylgroups and then coated with a polymer to render them water-soluble. Thenanoparticles were characterized by TEM, FT-IR, UVvis absorption andphotoluminescence. The Si nanoparticles were shown to have an average diameter of3.9 ± 1.3 nm and exhibited room temperature photoluminescence with a peak maximum at 438 nmwith a quantum efficiency of 32% in hexane and 18% in water; the emission wasstable in ambient air for up to 2 months. These nanoparticles could hold greatpotential as a non-heavy-element-containing quantum dot for applications in biology. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Nanotechnology IOP Publishing

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

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Copyright
Copyright IOP Publishing Ltd
ISSN
0957-4484
eISSN
1361-6528
DOI
10.1088/0957-4484/18/9/095601
Publisher site
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Abstract

Hydrogen-capped silicon nanoparticles with strong blue photoluminescencewere synthesized by the metathesis reaction of sodium silicide, NaSi, withNH4Br. The hydrogen-capped Si nanoparticles were further terminated with octylgroups and then coated with a polymer to render them water-soluble. Thenanoparticles were characterized by TEM, FT-IR, UVvis absorption andphotoluminescence. The Si nanoparticles were shown to have an average diameter of3.9 ± 1.3 nm and exhibited room temperature photoluminescence with a peak maximum at 438 nmwith a quantum efficiency of 32% in hexane and 18% in water; the emission wasstable in ambient air for up to 2 months. These nanoparticles could hold greatpotential as a non-heavy-element-containing quantum dot for applications in biology.

Journal

Nanotechnology – IOP Publishing

Published: Mar 7, 2007

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