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Smart Homopolymer Modification to Single Glass Conical Nanopore Channels: Dual-Stimuli-Actuated Highly Efficient Ion Gating

Authors

  • Li-Xiang Zhang,

    1. Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China
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  • Sheng-Lin Cai,

    1. Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China
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  • Yu-Bin Zheng,

    1. Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China
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  • Xiao-Hong Cao,

    1. Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China, Department of Applied Chemistry, East China Institute of Technology, Fuzhou, 344000, P.R. China
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  • Yao-Qun Li

    Corresponding author
    1. Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China
    • Department of Chemistry and Key Laboratory of Analytical Sciences, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, P.R. China.
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Abstract

For the first time, the integration of a smart homopolymer poly[2–(dimethylamino) ethyl methacrylate] (PDMAEMA), which undergoes both pH- and temperature-induced conformational transitions, is demonstrated in a single glass conical nanopore channel, to achieve a smart nanodevice that can be reversibly switched between the high conducting “on” state and low conducting “off” state with high gating efficiency due to the conformational changes of the homopolymer brush effected by varying the pH and temperature of the surrounding media.

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