Glass-forming materials are characterized by an intermittent motion at the microscopic scale. Particles spend most of their time rattling within the cages formed by their neighbors, and seldom jump to a different cage. In molecular glass formers the temperature dependence of the jump features, such as the average caging time and jump length, characterizes the relaxation processes and allows for a short-time prediction of the diffusivity. Here we experimentally investigate the cage-jump motion of a two-dimensional hard-sphere-like colloidal suspension, where the volume fraction is the relevant parameter controlling the slowing down of the dynamics. We characterize the volume fraction dependence of the cage-jump features and show that, as in molecular systems, they allow for a short time prediction of the diffusivity.

Connecting short and long time dynamics in hard-sphere-like colloidal glasses / Pastore, R.; Pica Ciamarra, M.; Pesce, G.; Sasso, A.. - In: SOFT MATTER. - ISSN 1744-683X. - 11:3(2015), pp. 622-626. [10.1039/c4sm02147a]

Connecting short and long time dynamics in hard-sphere-like colloidal glasses

Pastore R.
Primo
;
Pesce G.;Sasso A.
2015

Abstract

Glass-forming materials are characterized by an intermittent motion at the microscopic scale. Particles spend most of their time rattling within the cages formed by their neighbors, and seldom jump to a different cage. In molecular glass formers the temperature dependence of the jump features, such as the average caging time and jump length, characterizes the relaxation processes and allows for a short-time prediction of the diffusivity. Here we experimentally investigate the cage-jump motion of a two-dimensional hard-sphere-like colloidal suspension, where the volume fraction is the relevant parameter controlling the slowing down of the dynamics. We characterize the volume fraction dependence of the cage-jump features and show that, as in molecular systems, they allow for a short time prediction of the diffusivity.
2015
Connecting short and long time dynamics in hard-sphere-like colloidal glasses / Pastore, R.; Pica Ciamarra, M.; Pesce, G.; Sasso, A.. - In: SOFT MATTER. - ISSN 1744-683X. - 11:3(2015), pp. 622-626. [10.1039/c4sm02147a]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/878990
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