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WW9.11 - Ionic Liquids: Bulk and Interfacial Nanostructure 
April 25, 2014   11:45am - 12:00pm

Ionic liquids are a subset of molten salts, distinguished by having melting points below 100 °C. This reduction in melting point is brought about by weakening electrostatic interactions be-tween the ions and hindering crystal lattice packing, typically by making at least one of the ions large, unsymmetrical and organic. Whilst conventional molecular liquids are structurally ho-mogeneous, ILs are nanostructured. This nanostructure arises from cohesive interactions be-tween the different parts of the ions, and consists of distinct polar and non-polar domains. In this work we present a novel computational method that combines a stochastic search algo-rithm and accurate molecular simulations for studying nanostructure in protic ionic liquids [1]. These simulations accurately reproduce experimentally observed nanostructure of bulk protic ionic liquids [2], and in combination with atomic force microscopy, reveal how this nanostructure changes in the vicinity of a smooth solid surface. Our simulations also demonstrate the dynamic nature of the hydrogen bond network that underpins protic ionic liquid nanostructure, and raise ques-tions regarding previous arguments used to explain anomalous stabilities in ionic liquid clus-ters [3,4]. [1] M. A. Addicoat, S. Fukuoka, A. J. Page, S. Irle, J. Comp. Chem., 34, 2591-2600 (2013)[1] R. Hayes, S. Imberti, G. G. Warr, R. Atkin, Ang. Chem. Int. Ed., 52, 4623-4627 (2013) [2] R. Ludwig, J. Phys. Chem. B, 113, 15419-15422 (2009) [3] D. F. Kennedy, C. J. Drummond, J. Phys. Chem. B, 113, 5690-5693 (2009)

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Keynote Address
Panel Discussion - Different Approaches to Commercializing Materials Research
Business Challenges to Starting a Materials-Based Company
Fred Kavli Distinguished Lectureship in Nanoscience
Application of In-situ X-ray Absorption, Emission and Powder Diffraction Studies in Nanomaterials Research - From the Design of an In-situ Experiment to Data Analysis