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첨단연성물질 연구단
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Breakdown of diffusivity–entropy scaling in colloidal glass-forming liquids

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Title
Breakdown of diffusivity–entropy scaling in colloidal glass-forming liquids
Author(s)
Bo Li; Xiuming Xiao; Kai Lou; Shuxia Wang; Weijia Wen; Ziren Wang
Publication Date
2018-11
Journal
COMMUNICATIONS PHYSICS, v.1, no.79, pp. -
Publisher
NATURE PUBLISHING GROUP
Abstract
Glass is a liquid that has lost its ability to flow. Why this particular substance undergoes such a dramatic kinetic slowdown yet remains barely distinguishable in structure from its fluid state upon cooling constitutes the central question of glass transition physics. Here, we investigate the pathway of kinetic slowdown in glass-forming liquids that consist of monolayers of ellipsoidal or binary spherical colloids. In contrast to rotational motion, the dynamics of the translational motion begin to violently slow down at considerably low area fractions (ϕT). At ϕT, anomalous translation–rotation coupling is enhanced and the topography of the free energy landscape become rugged. Based on the positive correlation between ϕT and fragility, the measurement of ϕT offers a novel method for predicting glassy dynamics, circumventing the prohibitive increase in equilibrium times required in high-density regions. Our results highlight the role that thermodynamical entropy plays in glass transitions.
URI
https://pr.ibs.re.kr/handle/8788114/5075
ISSN
2399-3650
Appears in Collections:
Center for Soft and Living Matter(첨단연성물질 연구단) > Journal Papers (저널논문)
Files in This Item:
2018_Communication Physics.pdfDownload

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