Nano Archive

Raman spectra of CdS nanocrystals in Nafion: longitudinal optical and confined acoustic phonon modes

Nandakumar, P. and Vijayan , C. and Rajalakshmi , M. and Arora , A. K. and Murti , Y. V. G. S. (2001) Raman spectra of CdS nanocrystals in Nafion: longitudinal optical and confined acoustic phonon modes. Physica E: Low-dimensional Systems and Nanostructures, 11 (4). pp. 377-383. ISSN 1386-9477

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Abstract

Quantum confinement effects on the longitudinal optical and acoustic phonons in US nanocrystals in the strongly confined regime in the polymer matrix Nafion are studied using Raman spectroscopy. The LO-phonon modes show size-dependent asymmetric broadening though the broadening and asymmetry are less than those predicted by the phonon confinement models. Two types of confined acoustic modes corresponding to n = 1, l = 0 and n = 1, l = 2 spheroidal vibrations are observed. Softening of the spheroidal modes is observed in the strongly confined regime. (C) 2001 Elsevier Science B.V. All rights reserved.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7096
Deposited By:JNCASR
Deposited On:02 Sep 2009 10:27
Last Modified:02 Sep 2009 10:27

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