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Dresden 2009 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 4: II-VI semiconductors

HL 4.2: Talk

Monday, March 23, 2009, 10:30–10:45, POT 51

Temperature dependent Raman scattering experiments of CdSe nanorods — •Patryk Kusch1, Holger Lange1, Mikhail Artemyev2, and Christian Thomsen11TU-Berlin, Institut für Festkörperphysik, Berlin, Germany — 2Institute for Physico-Chemical Problems, Belarusian State University, Minsk, Belarus

We present temperature dependent Raman scattering experiments of different sized colloidal CdSe nanorods. We monitor the dependence of the temperature on the longitudinal optical phonon (LO) related Raman band. The LO frequency shows a red shift with increasing temperature. This is consistent with a theoretical model from Balkanski et al.[1]. The exact influence of the sample temperature on the Raman spectra also depends on the nanorod geometry. The results are used to examine the interaction of phonon confinement and temperature effects. Furthermore the heat stability of the colloidal nanorods is investigated in order to examine their suitability for high temperature environments.

[1] M. Balkanski, R.F. Wallis and E. Haro, Phys. Rev. B28 (1983) 1928.

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