Flexible confinement leads to multiple relaxation regimes in glassy colloidal liquids

Ian Williams; Erdal C. Oguz; Paul Bartlett; Hartmut Löwen; C. Patrick Royall

doi:10.1063/1.4905472

Flexible confinement leads to multiple relaxation regimes in glassy colloidal liquids

Ian Williams, Erdal C. Oguz, Paul Bartlett, Hartmut Löwen, C. Patrick Royall

Research output: Contribution to journal › Article (Academic Journal) › peer-review

8 Citations (Scopus)

Abstract

Understanding relaxation of supercooled fluids is a major challenge and confining such systems can lead to bewildering behaviour. Here, we exploit an optically confined colloidal model system in which we use reduced pressure as a control parameter. The dynamics of the system are “Arrhenius” at low and moderate pressure, but at higher pressures relaxation is faster than expected. We associate this faster relaxation with a decrease in density adjacent to the confining boundary due to local ordering in the system enabled by the flexible wall.

Original language	English
Pages (from-to)	024505
Number of pages	1
Journal	Journal of Chemical Physics
Volume	142
Issue number	2
DOIs	https://doi.org/10.1063/1.4905472
Publication status	Published - 2015

Bibliographical note

[it 1 citations]

Keywords

Colloidal systems, Crystal structure, Crystal voids, Glass transitions, Relaxation times

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10.1063/1.4905472

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abstract = "Understanding relaxation of supercooled fluids is a major challenge and confining such systems can lead to bewildering behaviour. Here, we exploit an optically confined colloidal model system in which we use reduced pressure as a control parameter. The dynamics of the system are “Arrhenius” at low and moderate pressure, but at higher pressures relaxation is faster than expected. We associate this faster relaxation with a decrease in density adjacent to the confining boundary due to local ordering in the system enabled by the flexible wall.",

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AU - Williams, Ian

AU - Oguz, Erdal C.

AU - Bartlett, Paul

AU - Löwen, Hartmut

AU - Royall, C. Patrick

N1 - [it 1 citations]

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AB - Understanding relaxation of supercooled fluids is a major challenge and confining such systems can lead to bewildering behaviour. Here, we exploit an optically confined colloidal model system in which we use reduced pressure as a control parameter. The dynamics of the system are “Arrhenius” at low and moderate pressure, but at higher pressures relaxation is faster than expected. We associate this faster relaxation with a decrease in density adjacent to the confining boundary due to local ordering in the system enabled by the flexible wall.

KW - Colloidal systems, Crystal structure, Crystal voids, Glass transitions, Relaxation times

U2 - 10.1063/1.4905472

DO - 10.1063/1.4905472

M3 - Article (Academic Journal)

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