Controllable ion transport induced by pH gradient in a thermally crosslinked submicrochannel heterogeneous membrane

Solid-state nanochannels have attracted considerable attention for their similar ion transport properties to biological ion channels. The construction of porous ion channels with good stability at the submicro/micrometer scale is very beneficial to develop large-area ion channel devices. In this man...

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Bibliographic Details
Published in:Analyst (London) 2021-11, Vol.146 (22), p.6815-6821
Main Authors: Tang, Yuan-Ju, Zhang, Shu-jie, Zhong, Zi-Tao, Su, Wen-Ming, Zhao, Yuan-Di
Format: Article
Language:English
Subjects:
Aluminum oxide
Biological properties
Bionics
Crosslinking
Ion channels
Ion currents
Ion transport
Ions
Membranes
Nanochannels
Organic chemistry
Stability
Transport properties
Wettability
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Summary:Solid-state nanochannels have attracted considerable attention for their similar ion transport properties to biological ion channels. The construction of porous ion channels with good stability at the submicro/micrometer scale is very beneficial to develop large-area ion channel devices. In this manuscript, based on in-situ thermal crosslinking of a small organic molecule containing triphenylamine and styrene groups, we construct a heterogeneous membrane with asymmetrical charge and wettability on cylindrical anodic aluminum oxide (AAO) channels ( D 319 nm). This heterogeneous membrane has typical ion current rectification characteristics with a high rectification ratio of 36.9 and good stability. This work provides an effective strategy for the construction of submicrochannel heterogeneous membranes and also broadens the application range of bionic ion channels. A submicrochannel heterogeneous membrane with asymmetric surface charge and wettability was constructed by in-situ thermal cross-linking polymerization on cylindrical AAO channels, and a typical ICR was presented by regulating the pH gradient.
ISSN:0003-2654
1364-5528
DOI:10.1039/d1an01522b