Journal
PHYSICAL REVIEW LETTERS
Volume 104, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.104.058301
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- Deutsche Forschungsgemeinschaft [SFB-TR6]
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Dynamic light scattering was used to study the dynamic structure factor, S(q, t), of suspensions of charged colloidal silica spheres over the full colloidal time range. We show that a dynamic scaling relation for S(q, t) found by Segre and Pusey [Phys. Rev. Lett. 77, 771 (1996)] for hard spheres, relating long-time and short-time dynamics, and collective and self-diffusion, also applies to charged colloids up to the freezing concentration. The universality of this scaling is analyzed theoretically. Our experimental data confirm dynamic freezing criteria proposed for the long-time self-and cage-diffusion coefficients, along with a theoretical prediction for the self-diffusion coefficient.
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