电化学2017，Vol.23Issue(1)：64-71,8.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
Effect of Pressure on Ion Selectivity in Biomimetic Nanopores with pH-Tunable Polyelectrolyte Brushes
摘要
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.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Key words
pH-tunable polyelectrolyte layer/synthetic nanopore/ion transport/ion selectivity分类
数理科学引用本文复制引用
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,2017,23(1):64-71,8.基金项目
国家自然科学基金项目(No.61271230,No.61472190)资助 （No.61271230,No.61472190）
