Sonochemical Synthesis of Silicon Nanocrystals

Autor:	Soojin Lee, Il Ki Han, Woon Jo Cho, Chong Shik Chin
Rok vydání:	2005
Předmět:	Materials science Mechanical Engineering Analytical chemistry Nanotechnology Sonochemistry chemistry.chemical_compound Wavelength chemistry Dynamic light scattering Nanocrystal Mechanics of Materials Silicide General Materials Science Crystalline silicon Surface states Ambient pressure
Zdroj:	Key Engineering Materials. :995-999
ISSN:	1662-9795
DOI:	10.4028/www.scientific.net/kem.277-279.995
Popis:	Silicon nanocrystals in a range from 2 nm to 5 nm were prepared from Zintl salt, soldium silicide (NaSi) by sonochemical method. This synthesis permits that the reaction be completed in only a few hours and the easy alkyl-modification of nanocrystals surface at room temperature and ambient pressure. The average size of nanocrystals measured by the dynamic light scattering analysis was 2.7 nm. The high-resolution transmission electron micrograph confirmed the material identity of nanocrystals as crystalline silicon. FT-IR spectra are consistent with the surface states of nanocrystals that are chlorine-or butyl-capped. The emission peak center moved to a longer wavelength (up to 430 nm) with the reaction time, under a 325 nm excitation.
Databáze:	OpenAIRE
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