Anions effect on ion transport properties of polyelectrolyte modified single conical nanopores

被引：8
|
作者：
Haider, M. Hamza Ali [1 ]
Ali, Mubarak [1 ,2 ]
Ensinger, Wolfgang [1 ]
机构：
[1] Tech Univ Darmstadt, Mat Anal Grp, Dept Mat & Geosci, Alarich Weiss Str 02, D-64287 Darmstadt, Germany
[2] GSI Helmholtzzentrum Schwerionenforsch, Mat Res Dept, Planckstr 01, D-64291 Darmstadt, Germany
来源：
CHEMICAL PHYSICS LETTERS | 2021年 / 767卷
关键词：
Asymmetric nanopores; Track-etching; Cationic polyelectrolytes; Ion current rectification; Surface functionalisation;
D O I：
10.1016/j.cplett.2021.138349
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Here we present screening effect of various anions on nanopore fixed surface charges. The anions could not induce significant change in ion transport through negatively charged nanopore. For positively charged nano pore, the order of monovalent anions effect is: H2PO4- > HCO3- > NO3- > BrO3- Cl-. The divalent HPO42- exhibits significant changes in the rectified ion flux, while SO42- could not induce any noticeable change even at higher concentrations. Our experimental results demonstrated the ability of various anions to interact with fixed surface charges and their effect on nanopore transport characteristics.
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页数：7
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