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Near white light emission of silicon nanocrystals
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Paper Abstract

Silicon nanoparticles in the range from 2 nm to 5 nm was prepared from Zintl salt, soldium silicide (NaSi) by sonochemical method. This synthesis permits the reaction completed as fast as in a few hours and the easy alkyl-modification of nanocrystals surface at room temperature and ambient pressure. The average size of nanoparticles measured by the dynamic light scattering analysis was 2.7 nm. The high-resolution transmission electron micrograph cofirmed the material identity of nanoparticles as crystalline silicon. FT-IR spectra are consistent with the surface states of nanocrystals that is chlorine- or butyl-capped. The emission peak center moved to longer wavelength (up to 430 nm) with the reaction time, under a 325 nm excitation. The luminescence of silicon colloids looks bright bluish-white under excitation using a commercial low-intensity UV lamp.

Paper Details

Date Published: 24 November 2003
PDF: 8 pages
Proc. SPIE 5224, Nanomaterials and Their Optical Applications, (24 November 2003); doi: 10.1117/12.506581
Show Author Affiliations
Soojin Lee, Sogang Univ. (South Korea)
Il-Ki Han, Korea Institute of Science and Technology (South Korea)
Woon-Jo Cho, Korea Institute of Science and Technology (South Korea)

Published in SPIE Proceedings Vol. 5224:
Nanomaterials and Their Optical Applications
Guozhong Cao; Younan Xia; Paul V. Braun, Editor(s)

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