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Multiple Length-Scale Ordering in Network-forming Ionic Liquids

Mark Wilson 

Oxford University, Physical and Theoretical Chemistry Laboratory, South Parks Road, Oxford OX1 3QZ, United Kingdom

Abstract

Recent developments in the molecular dynamics computer simulation of network-forming liquids are discussed. Relatively simple potential energy models, in which many-body (dipolar) polarization is accounted for, are able to reproduce a range of static and dynamic properties. Ion polarization is shown to account for the network topology via controlling the number of edge- and corner- sharing polyhedral units. The nature of this intermediate-range order (as probed by the Bhatia-Thornton structure factors) is shown to depend subtly on the fractions of such linkages. Furthermore, the presence of the intermediate-range order is shown to have important implications for both the low temperature liquid relaxation dynamics and the presence of extended-range order.

 

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Presentation: Invited oral at E-MRS Fall Meeting 2008, Symposium G, by Mark Wilson
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-20 08:38
Revised:   2009-06-07 00:48