Journal
ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS
Volume 223, Issue 12, Pages 1417-1426Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1524/zpch.2009.5466
Keywords
Silicon Nanocrystals; Quantum Dot; Photoluminescence; Nanoparticles Synthesis
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Funding
- Malaysia Toray Science Foundation
- Malaysian Government Science Fund [03-02-11-SF0004]
- ISAT Linkages Fund New Zealand
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We describe here the synthesis and characterization of silicon nanocrystals prepared by using microemulsion technique which involved the formation of inverse micelles. Colloidal systems employing TOAB as the surfactant molecules were used to synthesise nanosized silicon nanocrystals. The initial reaction of silicon tetrachloride, SiCl4 with a strong reducing agent, NaBH4 produced Si nanocrystals with hydrogen terminated surfaces. The surfaces of the nanocrystals were then capped with 1-heptene which protected the silicon nanocrystals from oxidation. The resultant surface passivated silicon nanocrystals suspended in organic solvent were characterized by Fourier transform infrared spectroscopy, photoluminescence spectroscopy and high resolution transmission electron microscopy. This study provided direct evidence of ageing, stability of different surface passivation and the quantum confinement effect in nanosized silicon nanocrystals.
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