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Supercooled liquids and the Glass Transition
As a liquid is cooled, its dynamic properties, e.g. diffusion or viscosity,
change dramatically. These processes become slower and slower, until, at the
glass transition, the liquid vitrifies. For fragile liquids, the temperature
dependence of these dynamic properties is super-Arrhenius, i.e. the effective
activation energy increases as the temperature is decreased. Such changes
must be a result of changes to the structure in the liquid, with the liquid
becoming more ordered at lower temperature. However, at is notoriouly difficult
to identify such structural ordering, and particularly any increase in a
structural length scale. In this project, we will take an alternative
approach to this task by first using isolated clusters to identify the
preferred local order within the system.
Relevant Publications
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J.P.K. Doye, A.A. Louis, I-C. Lin, L.R. Allen, E.G. Noya, A.W. Wilber, H.C. Kok, R. Lyus, Phys. Chem. Chem. Phys. 9, 2197-2205 (2007)
Controlling crystallization and its absence: Proteins, colloids and
patchy models
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J.P.K. Doye, D.J. Wales, F.H.M. Zetterling and M. Dzugutov, J. Chem. Phys. 118, 2792-2799 (2003)
The favoured cluster structures of model glass formers
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J.P.K. Doye, D.J. Wales and S.I. Simdyankin, Faraday Discuss. 118, 159-170 (2001)
Global
optimization and the energy landscapes of Dzugutov clusters
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