质子
质子输运
材料科学
膜
介孔材料
离子运输机
纳米技术
质子交换膜燃料电池
Nafion公司
门控
离子
介孔二氧化硅
电导率
电化学
电化学梯度
化学工程
电极
化学
催化作用
有机化学
生物物理学
物理化学
工程类
物理
生物
量子力学
生物化学
作者
Rong Fan,Seong Huh,Ruoxue Yan,John Arnold,Peidong Yang
出处
期刊:Nature Materials
[Springer Nature]
日期:2008-02-24
卷期号:7 (4): 303-307
被引量:231
摘要
Modulated proton transport plays significant roles in biological processes such as ATP synthesis as well as in technologically important applications including, for example, hydrogen fuel cells. The state-of-the-art proton-exchange membrane is the sulphonated tetrafluoroethylene copolymer Nafion developed by DuPont in the late 1960s, with a high proton conductivity. However, actively switchable proton conduction, a functional mimic of the ion transport within a cell membrane, has yet to be realized. Herein, we report the electrostatic gating of proton transport within aligned mesoporous silica thin film. It is observed that surface-charge-mediated transport is dominant at low proton concentrations. We have further demonstrated that the proton conduction can be actively modulated by two-fourfold with a gate voltage as low as 1 V. Such artificial gatable ion transport media could have potential applications in nanofluidic chemical processors, biomolecular separation and electrochemical energy conversion.
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