Volume 58, Number 5, June 2002
|Page(s)||699 - 704|
|Section||Condensed matter: structure, mechanical and thermal properties|
|Published online||01 May 2002|
Phonons in colloidal crystals
Physics Department, University of Crete - Heraklion, Greece
2 FORTH, Institute of Electronic Structure and Laser P.O. Box 1527, 71110 Heraklion, Crete, Greece
3 Max-Planck Institute for Polymer Research P.O. Box 3148, 55128 Mainz, Germany
4 Department of Chemical Engineering, Princeton University Princeton, NY 08544, USA
Accepted: 7 March 2002
The dispersion curves of the phonons propagating in polycrystalline suspensions of hard-sphere colloids are measured by Brillouin scattering and calculated by band structure techniques. Acoustic-like and optical-like experimental phonon dispersion relations are attributed to the interplay of the solvent matrix mode with the single-sphere vibration eigenmodes in these lattice structures.
PACS: 63.20.-e – Phonons in crystal lattices / 82.70.Dd – Colloids / 62.30.+d – Mechanical and elastic waves; vibrations
© EDP Sciences, 2002
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