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research
Resonance Raman spectra of wurtzite and zincblende CdSe nanocrystals
Authors
JA Baker
Q Dai
+3 more
ZJ Jiang
AM Kelley
DF Kelley
Publication date
1 January 2013
Publisher
eScholarship, University of California
Abstract
Resonance Raman spectra and absolute differential Raman cross-sections have been measured for CdSe nanocrystals in both the wurtzite and zincblende crystal forms at four excitation wavelengths from 457.9 to 514.5 nm. The frequency and bandshape of the longitudinal optical (LO) phonon fundamental is essentially identical for both crystal forms at each excitation wavelength. The LO phonon overtone to fundamental intensity ratio appears to be slightly higher for the wurtzite form, which may suggest slightly stronger exciton-phonon coupling from the Fröhlich mechanism in the wurtzite form. The LO fundamental Raman cross-sections are very similar for both crystal forms at each excitation wavelength. © 2012 Elsevier B.V. All rights reserved
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Last time updated on 25/12/2021