Suganthi, A. R. Baby and Joshi, Amish G. and Sagayaraj, P. (2012) A novel two-phase thermal approach for synthesizing CdSe/CdS core/shell nanostructure. Journal of Nanoparticle Research , 14 (2). 691-1-691-9. ISSN 1388-0764

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Abstract

CdSe/CdS core/shell nanocrystals have been synthesized through a low cost and simple twophase thermal route. The optical spectroscopy and structural characterization evidenced the core/shell structure of the CdSe/CdS nanoparticles. The X-ray diffraction patterns of CdSe and CdSe/CdS nanoparticles exhibited peak positions corresponding to those of their bulk cubic crystal structures. The X-ray photoelectron spectroscopy data confirmed the elemental composition of the CdSe/CdS nanoparticles. The absorption spectra of core/shell nanoparticles showed red shift with respect to the core CdSe nanoparticles. The photoluminescence study indicates that the intensity of the emission maximum is considerably increased in the core/shell structure as compared with the parent material, and the capping of CdS nanoparticles with CdSe material exhibit a near band-edge emission, indicating a successful passivation by removing surface defects. The high-resolution transmission microscope images of the bare and core/shell nanoparticles ascertained the monodispersed and well-defined spherical particles. The average particle sizes for CdSe and CdSe/CdS nanoparticles are 2.5 and 5 nm, respectively, thus confirming, the larger diameter of CdSe/CdS core/shell nanostructure than the core CdSe nanoparticles.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/S Springer Verlag.
Subjects:	Chemistry Materials Science Nanoscience/ Nanotechnology
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	04 Feb 2020 11:38
Last Modified:	04 Feb 2020 11:38
URI:	http://npl.csircentral.net/id/eprint/3711

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