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A Raman study of CdSe and ZnSe nanostructures

Teredesai, Pallavi V and Deepak, Leonard F and Govindaraj, A and Sood, AK and Rao, CNR (2002) A Raman study of CdSe and ZnSe nanostructures. In: Journal of Nanoscience and Nanotechnology, 2 (5). pp. 495-498.

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Official URL: http://www.ingentaconnect.com/content/asp/jnn/2002...

Abstract

Raman studies have been carried out on CdSe nanotubes and ZnSe nanorods produced by surfactant-assisted synthesis. The Raman spectrum of CdSe nanotubes shows modes at 207.5 and 198 cm(-1); the former arises from the longitudinal optic phonon mode red-shifted with respect to the bulk mode because of phonon confinement, and the latter is the I = 1 surface phonon. Analysis based on the phonon confinement model demonstrates that the size of the nanoparticle responsible for the red-shift is about 4 nm, close to the estimate from the blue-shift of the photoluminescence. The Raman spectrum of ZnSe,nanorods shows modes at 257 and 213 cm(-1), assigned to longitudinal and transverse optic phonons, blue-shifted with respect to the bulk ZnSe modes because of compressive strain. The mode at 237 cm(-1) is the surface phonon.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to American Scientific Publishers.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 04 Aug 2011 05:32
Last Modified: 04 Aug 2011 05:32
URI: http://eprints.iisc.ernet.in/id/eprint/38995

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