文献类型：期刊文献

英文题名：Synergistic Effect of Electrostatic Interaction and Ionic Dehydration on Asymmetric Ion Transport in Nanochannel/Ion Channel Composite Membrane

作者：Wu, Zeng-Qiang[1,2];Li, Cheng-Yong[1,3];Ding, Xin-Lei[1];Li, Zhong-Qiu[1];Xia, Xing-Hua[1]

机构：[1]Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210023, Peoples R China;[2]Nantong Univ, Sch Publ Hlth, Nantong 226019, Peoples R China;[3]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China

年份：2022

卷号：13

期号：23

起止页码：5267

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：SCI-EXPANDED(收录号：WOS:000813421200001)、、EI(收录号：20224513068954)、Scopus(收录号：2-s2.0-85141310728)、WOS

基金：This work was supported by grants from the National Natural Science Foundation of China (21775066, 21874029, 21974058, and 22074061) and the Guangdong Basic and Applied Basic Research Foundation (2021A1515010291). The authors also gratefully acknowledge the HPCC (High-Performance Computing Center) of Nanjing University.

语种：英文

外文关键词：Composite membranes - Electrostatics - Ions

外文摘要：Ion transport in nanochannels of a size comparable to that of hydrated ions exhibits unique properties due to the synergistic effect of various forces. Here, we design a nanochannel/ion channel composite (NIC) membrane that shows a high ion current rectification (ICR) ratio in different electrolytes. Experimental and theoretical results demonstrate that the synergistic effect of electrostatic interaction and ionic dehydration plays an important role in regulating the ICR behavior of the NIC membrane. We find that electrostatic attraction between ions and the channel surface in the ultraconfined space increases the probability of ionic dehydarion, resulting in different dehydration energy costs for different ions. This further alters the driving force for ion transport and thus regulates ICR of the NIC membrane. This work provides fundamental knowledge of ion transport in ion channels, which aids in the understanding of the function of biological systems and the design of highperformance nanochannel devices.