报告摘要：

Ionic liquids (ILs) based concentrated electrolyte solutions are a novel class of liquids with high charge density and tunable physicochemical properties. They have shown promise in many transformative technologies including energy storage and biomass processing. Nevertheless, the high viscosity of neat ILs often limits their broader uptake. Over the past decade, much has been learnt about the self-assembled bulk nanostructure of these complex liquids, however, virtually nothing is known about their dynamics, both the single ion diffusion and the collective motion of clusters. This is due to the complex and disordered nature of liquid nanostructure, which is expected to display a range of dynamic behaviours on different time and length scales. We have employed multi-contrast neutron diffraction and wide-angle neutron spin echo spectroscopy (WASP, ILL) to study a range of model systems. Combined with NMR diffusiometry, we are able to capture dynamics over nine orders of magnitude and resolve the atomic arrangements in model ILs. Polarisation analysis has further enabled unambiguous separation of self and collective dynamics, allowing us to deconvolute the molecular origin of viscous dissipation.

报告人简介：

Shurui is currently a Research Fellow in Physical Chemistry at St John’s College, University of Oxford. He completed his PhD at the University of Sydney worked with Prof. Gregory Warr. He moved to UK to work with Prof. Susan Perkin as a postdoc before being awarded his Fellowship in 2024. He is interested in understanding structures and dynamics of complex liquids and solutions and is an experienced user of neutron and x-ray methods. His achievements have been recognised by many awards, including as the inaugural recipient of the ISIS Neutron and Muon Source Springboard Award.

邀请人：王雪龙 副研究员

联系人：魏佳 secuf_wj@iphy.ac.cn