报告题目：Water Flow in Graphene Nano-Channels by Neutron Scattering and MD Simulation

报告人：李济晨 教授

School of Physics and Astronomy, the University of Manchester, Manchester, M13 9PL, UK

报告时间：2018年9月18日下午2:00

报告地点：知新楼C1011

邀请人：戴瑛 教授

报告摘要：

Water transport through nanoscale channels has fundamental importance to many biological processes and biological structures, such as in ion channels, molecular binding under water’s influence. It also has important potential industrial applications, such as gas separation and water purification. We study the flow through grapheme nano-channels, in order to better understand a recent experiment that finds a surprising enhancement of flow for nanoscale channels [Gaim group, Nature,  44, 2015]. The structure and flux of water inside graphene channels were investigated by neutron scattering and MD simulation. We find layered structures of water were responsible for the large flux of water, until the channel thickness reaches 2.72nm which corresponds seven layers of graphene being removed from a graphite crystal. At that point the flux suddenly drops and at the same time the previous ordered water structure disappears. Since our results are based on nano-confined environment where long range interaction is not included in our simulation. We also conclude that the reason experimental results from water flow through carbon-nanotubes show a wide range of variation is due to the formation of imperfect or completely different layered ice-like water structures in their channels.

个人简历：

详见附件