Lattice model of dynamic heterogeneity and kinetic arrest in glass-forming liquids

Nicholas B. Tito; Jane E.G. Lipson; Scott T. Milner

doi:10.1039/c3sm25679k

Lattice model of dynamic heterogeneity and kinetic arrest in glass-forming liquids

Nicholas B. Tito, Jane E.G. Lipson, Scott T. Milner

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

We present a new model of glass-forming liquids in which free volume fluctuations drive dynamic heterogeneity and diffusion of mobility. Our kinetic model is developed from a microscopic perspective where free volume creation requires existing free volume nearby as a source of mobility; free volume diffusion and destruction is spontaneous by virtue of its own mobility. Simulations indicate "molten" and kinetically arrested "glassy" regions in parameter space, and a critical point where dynamic length and intermittency time scales grow as power laws. Systems near the critical point contain colonies of free volume that propagate around bubbles of glassified material.

Original language	English (US)
Pages (from-to)	3173-3180
Number of pages	8
Journal	Soft matter
Volume	9
Issue number	11
DOIs	https://doi.org/10.1039/c3sm25679k
State	Published - Mar 21 2013

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics

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AU - Tito, Nicholas B.

AU - Lipson, Jane E.G.

AU - Milner, Scott T.

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Y1 - 2013/3/21

N2 - We present a new model of glass-forming liquids in which free volume fluctuations drive dynamic heterogeneity and diffusion of mobility. Our kinetic model is developed from a microscopic perspective where free volume creation requires existing free volume nearby as a source of mobility; free volume diffusion and destruction is spontaneous by virtue of its own mobility. Simulations indicate "molten" and kinetically arrested "glassy" regions in parameter space, and a critical point where dynamic length and intermittency time scales grow as power laws. Systems near the critical point contain colonies of free volume that propagate around bubbles of glassified material.

AB - We present a new model of glass-forming liquids in which free volume fluctuations drive dynamic heterogeneity and diffusion of mobility. Our kinetic model is developed from a microscopic perspective where free volume creation requires existing free volume nearby as a source of mobility; free volume diffusion and destruction is spontaneous by virtue of its own mobility. Simulations indicate "molten" and kinetically arrested "glassy" regions in parameter space, and a critical point where dynamic length and intermittency time scales grow as power laws. Systems near the critical point contain colonies of free volume that propagate around bubbles of glassified material.

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JO - Soft matter

JF - Soft matter

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Lattice model of dynamic heterogeneity and kinetic arrest in glass-forming liquids

Abstract

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