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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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.
|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
|Deposited On:||02 Sep 2009 10:27|
|Last Modified:||02 Sep 2009 10:27|
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