Breakdown of fast water transport in graphene oxides

作     者：Ning Wei Xinsheng Peng Zhiping Xu 

作者机构：Applied Mechanics Laboratory Department of Engineering Mechanics Center for Nano and Micro Mechanics Tsinghua University Beijing 100084 China Department of Materials Science and Engineering State Key Laboratory of Silicon Materials Zhejiang University Hangzhou 310028 China 

出 版 物：《Physical Review E》 (物理学评论E辑：统计、非线性和软体物理学)

年 卷 期：2014年第89卷第1期

页      面：012113-012113页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0702[理学-物理学] 

基　　金：National Natural Science Foundation of China  (11002079  11222217  21271154) 

主　　题：Breakdown transport oxides slip flow transport CONNECTED NETWORKS graphene Fasting Boundary conditions oxides Flow rates APPARENT VISCOSITY Structural properties water absorption Water transport Molecular Dynamics Simulation Breakdown graphene oxide 

摘      要：Fast slip flow was identified for water inside the interlayer gallery between graphene layers or carbon nanotubes. We report here that this significant flow rate enhancement (over two orders) breaks down with the presence of chemical functionalization and relaxation of nanoconfinement in graphene oxides. Molecular dynamics simulation results show that hydrodynamics applies in this circumstance, even at length scales down to nanometers. However, corrections to the slip boundary condition and apparent viscosity of nanoconfined flow must be included to make quantitative predictions. These results were discussed with the structural characteristics of liquid water and hydrogen-bond networks.