Research Article


2021, 14(5): 1421–1428


A universal functionalization strategy for biomimetic nanochannel via external electric field assisted non-covalent interaction

Yunfei Teng1,2, Xiang-Yu Kong1 (✉), Pei Liu1,2, Yongchao Qian1, Yuhao Hu1, Lin Fu1,2, Weiwen Xin1,2, Lei Jiang1,2, and Liping Wen1,2 (✉)

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1 CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 School of Future Technology, University of Chinese Academy of Sciences, Beijing 100049, China

Keywords: biomimetic, ionic nanofluidics, ionic rectification, solid-state nanopore, nanochannel
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  • Abstract
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Biological ion channels, as fundamental units participating in various daily behaviors with incredible mass transportation and signal transmission, triggered booming researches on manufacturing their artificial prototypes. Biomimetic ion channel with the nanometer scale for smart responding functions has been successfully realized in sorts of materials by employing state-of-art nanotechnology. Ion track-etching technology, as crucial branches of fabricating solid-state nanochannels, exhibits outstanding advantages, such as easy fabrication, low cost, and high customization. To endow the nanochannel with smart responsibility, various modification methods are developed, including chemical grafting, non-covalent adsorption, and electrochemical deposition, enriching the reservoir of accessible stimuli-responses combinations, whereas were limited by their relatively lengthy and complex procedure. Here, based on the electric field induced self-assembly of polyelectrolytes, a universal customizable modifying strategy has been proposed, which exhibits superiorities in their functionalization with convenience and compatibility. By using this protocol, the channels’ ionic transport behaviors could be easily tuned, and even the specific ionic or molecular responding could be realized with superior performance. This strategy surely accelerates the nanochannels functionalization into fast preparing, high efficiency, and large-scale application scenarios.
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A universal functionalization strategy for biomimetic nanochannel via external electric field assisted non-covalent interaction. Nano Res. 2021, 14(5): 1421–1428

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