Teredesai, Pallavi V. and Deepak, F. Leonard and Govindaraj, Achutharao and Sood, A. K. 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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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.
|Subjects:||Material Science > Nanochemistry|
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||03 Feb 2009 04:16|
|Last Modified:||08 Apr 2009 15:26|
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