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Bioinspired hydrogel-based nanofluidic ionic diodes: nano-confined network tuning and ion transport regulation

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Abstract

Biological ion channel-based mass transport and signal transduction play a crucial role in physiological activities, and biomimetic nanochannels in aqueous solutions for ion transport regulation have been extensively studied. Few studies on non-aqueous systems, gel-based nanochannels, mainly focus on the charged gel network or embedded electrolytes. However, the basic issue of how a nanoscale gel network affects the ion transport in nanochannels has been neglected. Here, we demonstrate a non-aqueous biomimetic nanochannel system by employing the agarose hydrogel in conical nanochannels. To tune the hydrogel network by adjusting the gel concentration, the ion transport behavior in gel-based nanochannels is systemically investigated. The experimental results show that the ion transport behaviors in gel-nanochannels with 2% gel present similar ion selectivity and rectification performance to the aqueous system, indicating fast investigation of gel-based systems with the knowledge of the extensively studied aqueous systems. Furthermore, a gel-based solid-state diode and logic circuits were fabricated.

Graphical abstract: Bioinspired hydrogel-based nanofluidic ionic diodes: nano-confined network tuning and ion transport regulation

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Supplementary files

Article information


Submitted
19 Feb 2020
Accepted
04 Jun 2020
First published
04 Jun 2020

Chem. Commun., 2020, Advance Article
Article type
Communication

Bioinspired hydrogel-based nanofluidic ionic diodes: nano-confined network tuning and ion transport regulation

C. Zhu, Y. Teng, G. Xie, P. Li, Y. Qian, B. Niu, P. Liu, W. Chen, X. Kong, L. Jiang and L. Wen, Chem. Commun., 2020, Advance Article , DOI: 10.1039/D0CC01313G

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