Nano Archive

A Raman Study of CdSe and ZnSe Nanostructures

Teredesai, Pallavi V. and Leonard , Deepak F. and Sood, A. K. and Govindaraj, A and Rao, C. N. R. (2002) A Raman Study of CdSe and ZnSe Nanostructures. Journal of Nanoscience and Nanotechnology, 2 (5). pp. 495-498.

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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 1 = 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:Article
Subjects:Material Science > Nanochemistry
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3898
Deposited By:JNCASR
Deposited On:27 Jan 2009 04:30
Last Modified:26 Mar 2009 14:47

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