Srivastava, Sanjay K. and Sareen , Vikas and Sharma, Mukul and -, Vandana and Singh, P. K. (2011) Synthesis, structural and photoluminescence properties of SiOx nanospheres prepared by evaporation of silicon monoxide. Materials Letters , 65 (21-22). pp. 3202-3204. ISSN 0167-577X

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Abstract

We report synthesis of amorphous silicon oxide nano-spheres in bulk quantity by using a simple non-catalytic process based on thermal evaporation of silicon monoxide. Structural characteristics of the nano-spheres were investigated using high resolution scanning and transmission electron microscopes equipped with energy dispersive X-ray spectroscopy (EDAX). Selected area electron diffraction and EDAX analyses revealed that nano-spheres were amorphous and comprised of silicon oxide only with Si and O in an atomic ratio of ~ 1:2. Photoluminescence measurements showed that the SiOx nano-spheres had strong emission band in the blue region. Possible growth mechanism based on vapor-solid model has been discussed. The SiO vapors generated at high temperature react with O2 to form SiOx vapors which subsequently condense on the substrates (placed in the appropriate temperature zone) to form SiOx nano-spheres.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier B.V.
Uncontrolled Keywords:	Amorphous materials; Nanoparticles; Microstructure; Luminescence; Electron microscopy
Subjects:	Materials Science Physics
Divisions:	UNSPECIFIED
Depositing User:	Mr. Abhishek Yadav
Date Deposited:	11 Oct 2012 12:22
Last Modified:	11 Oct 2012 12:22
URI:	http://npl.csircentral.net/id/eprint/678

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