| Issue |
Europhys. Lett.
Volume 58, Number 5, June 2002
|
|
|---|---|---|
| Page(s) | 699 - 704 | |
| Section | Condensed matter: structure, mechanical and thermal properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00322-3 | |
| Published online | 01 May 2002 | |
Phonons in colloidal crystals
1
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
Received:
9
November
2001
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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