压力对带有pH值可调聚电解质刷的仿生纳米孔中离子选择性的影响

doi:10.13208/j.electrochem.160104

电化学（中英文） ›› 2017, Vol. 23 ›› Issue (1): 64-71. doi: 10.13208/j.electrochem.160104

压力对带有pH值可调聚电解质刷的仿生纳米孔中离子选择性的影响

单惠霞¹，曾振平¹*，叶礼贤²，束峰^1，3

1. 南京理工大学电子工程与光电技术学院，南京 210094；2. 国立云林科技大学化学工程与材料工程系，云林 64002，台湾；3. 中国电波传播研究所，青岛 266107

收稿日期:2016-01-04 修回日期:2016-02-22 出版日期:2017-02-28 发布日期:2016-03-07
通讯作者: 曾振平 E-mail:zengzhenping@njust.edu.cn
基金资助:
国家自然科学基金项目（No. 61271230, No. 61472190）资助

Effect of Pressure on Ion Selectivity in Biomimetic Nanopores with pH-Tunable Polyelectrolyte Brushes

SHAN Hui-xia¹, ZENG Zhen-ping^1*, YE Li-xian², SHU Feng ^1,3

1.School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China; 2. Department of Chemical and Materials Engineering, National Yunlin University of Science and Technology, Yunlin 64002, Taiwan; 3. China Research Institute of Radiowave Propagation，Qingdao 266107，P. R. China

Received:2016-01-04 Revised:2016-02-22 Published:2017-02-28 Online:2016-03-07
Contact: ZENG Zhen-ping E-mail:zengzhenping@njust.edu.cn

摘要/Abstract

摘要：

具有pH值可调聚电解质（Polyelectrolyte，PE）刷的合成纳米孔的仿生离子通道在纳米尺度下离子、流体和生物粒子的主动运输控制方面具有重大应用潜力. 离子选择性是纳流体设备中离子传输的重要现象，具有很大的现实意义和实用价值. 本文提出了施加压力控制纳米孔中离子选择度的方法，综合研究了溶液pH值、浓度、外加电压和压力对离子选择度的影响. 仿真结果表明，离子选择度对压力的刺激是敏感的，且不像电压对离子选择度的影响会受到溶液pH值和浓度的制约，且方向不定，速度不可控；压力对离子选择度的影响不受溶液性质制约，并且灵活可控. 该结果对设计带pH值可调聚电解质刷的纳米孔有重要的启发作用.

关键词: pH值可调聚电解质层, 合成纳米孔, 离子传输, 离子选择性

Abstract:

Biomimetic ionic channels of synthetic nanopores functionalized with pH-tunable polyelectrolyte (PE) brushes have significant application potentials for active transport control of ions, fluids, and bioparticles on the nanoscale. Ion selectivity is an important phenomenon of ion transport in nanofluidic devices, which has great theoretical significance and practical values. We propose a pressure control scheme to control the ion selectivity in biomimetic nano-systems with pH-tunable PE brushes. Effects of the solution properties (i.e., pH and background salt concentration), the applied voltage and pressure on ion selectivity are comprehensively investigated. The results show that ion selectivity is sensitive to pressure. Unlike the influence of voltage on ion selectivity which is subject to pH and background salt concentration with uncertain directions and uncontrollable speeds, the influence of pressure on ion selectivity is not restricted by the properties of the solution, and has fixed directions and flexible and controllable speeds. The obtained result is a good inspiration for the design of synthetic nanopores functionalized with pH-tunable PE brushes.

Key words: pH-tunable polyelectrolyte layer, synthetic nanopore, ion transport, ion selectivity

中图分类号:

O362

单惠霞，曾振平，叶礼贤，束峰. 压力对带有pH值可调聚电解质刷的仿生纳米孔中离子选择性的影响[J]. 电化学（中英文）, 2017, 23(1): 64-71.

SHAN Hui-xia, ZENG Zhen-ping, YE Li-xian, SHU Feng. Effect of Pressure on Ion Selectivity in Biomimetic Nanopores with pH-Tunable Polyelectrolyte Brushes[J]. Journal of Electrochemistry, 2017, 23(1): 64-71.

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压力对带有pH值可调聚电解质刷的仿生纳米孔中离子选择性的影响

Effect of Pressure on Ion Selectivity in Biomimetic Nanopores with pH-Tunable Polyelectrolyte Brushes

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