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Updated: Aug 18, 2026

Confocal Imaging of Confined Quiescent and Flowing Colloid-polymer Mixtures
Published on: May 20, 2014
Long-wavelength transverse modes in charged colloidal crystals
B V R Tata1, P S Mohanty, M C Valsakumar
1Materials Science Division, Indira Gandhi Centre for Atomic Research, Kalpakkam -603 102, Tamil Nadu, India.
Abstract:
The dynamics of closely index matched colloidal crystals of charged silica spheres dispersed in deionized ethylene glycol-water mixture is investigated using dynamic light scattering. At variance with the reports of phonon dispersion measurements on thin colloidal crystals, our observations on millimeter-sized crystals show unambiguous evidence for overdamped transverse modes turning propagative in the range of small wave numbers in agreement with the theory of hydrodynamic interactions in charged colloidal crystals.
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