Evidence for an unusual dynamical-arrest scenario in short-ranged colloidal systems

Extensive molecular dynamics simulation studies of particles interacting via a short-ranged attractive square-well potential arc reported. The calculated loci of constant diffusion coefficient D in the temperature-packing fraction plane show a reentrant behavior, i.e., an increase of diffusivity on cooling, confirming an important part of the high volume-fraction dynamical-arrest scenario earlier predicted by theory for particles with short-ranged potentials. The more efficient localization mechanism induced by the short-range bonding provides, on average, additional free volume as compared to the hard-sphere case and results in faster dynamics. © 2002 The American Physical Society.

Published in:
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 65, 5, 050802/1-050802/4
15393755 15502376
Other identifiers:
Scopus: 2-s2.0-41349096385
Scopus: 2-s2.0-41349096385

 Record created 2010-01-27, last modified 2018-03-17

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