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

Yuan-Ju Tang; Shu-jie Zhang; Zi-Tao Zhong; Wen-Ming Su; Yuan-Di Zhao

doi:10.1039/D1AN01522B

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

Yuan-Ju Tang,^ab Shu-jie Zhang,^a Zi-Tao Zhong,

^a Wen-Ming Su

^c and Yuan-Di Zhao

*^ad

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* Corresponding authors

^a Britton Chance Center for Biomedical Photonics at Wuhan National Laboratory for Optoelectronics – Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, Hubei, P. R. China
E-mail: zydi@mail.hust.edu.cn

^b Department of Public Fundamental Courses, West Yunnan University of Applied Sciences, Dali 671000, Yunnan, P. R. China

^c Printable Electronics Research Center, Suzhou Institute of Nano-Technology and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, Jiangsu, P. R. China

^d Key Laboratory of Biomedical Photonics (HUST), Ministry of Education, Huazhong University of Science and Technology, Wuhan 430074, Hubei, P. R. China

Abstract

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.

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DOI: https://doi.org/10.1039/D1AN01522B
Article type: Paper
Submitted: 22 Aug 2021
Accepted: 29 Sep 2021
First published: 29 Sep 2021

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Analyst, 2021,146, 6815-6821

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

Y. Tang, S. Zhang, Z. Zhong, W. Su and Y. Zhao, Analyst, 2021, 146, 6815 DOI: 10.1039/D1AN01522B

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

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

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