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Updated: Jun 23, 2026

Characterization of Nanocrystal Size Distribution using Raman Spectroscopy with a Multi-particle Phonon Confinement Model
Published on: August 22, 2015
Geometry dependence of the phonon modes in CdSe nanorods
Holger Lange1, Mikhail Artemyev, Ulrike Woggon
1Institut für Festkörperphysik, Technische Universität Berlin, Berlin, Germany. holger.lange@physik.tu-berlin.de
Abstract:
We investigated the geometry dependence of the first-order Raman scattering band of CdSe nanorods experimentally. The band has an asymmetric shape and its position and exact line shape depend on the nanorod diameter and aspect ratio. The band consists of contributions from the longitudinal optical phonon and surface optical phonon modes. While the position of the longitudinal optical phonon related band is purely diameter dependent, the position of the surface optical phonon band depends on the nanorod's aspect ratio. This can be explained by the influence of phonon confinement and a model for surface optical phonons in nanorods.
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