Current Rectification in Temperature-Responsive Single Nanopores

被引：178

作者：

Guo, Wei ^{[1
,2
]}

Xia, Hongwei ^{[3
]}

Xia, Fan ^{[2
]}

Hou, Xu ^{[4
]}

Cao, Liuxuan ^{[1
]}

Wang, Lin ^{[1
]}

Xue, Jianming ^{[1
]}

Zhang, Guangzhao ^{[3
]}

Song, Yanlin ^{[2
]}

Zhu, Daoben ^{[2
]}

Wang, Yugang ^{[1
]}

Jiang, Lei ^{[2
]}

机构：

[1] Peking Univ, Ctr Appl Phys & Technol, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, BNLMS, Beijing 100190, Peoples R China

[3] Univ Sci & Technol China, Dept Chem Phys, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[4] Natl Ctr Nanosci & Technol, Beijing 100190, Peoples R China

来源：

CHEMPHYSCHEM | 2010年 / 11卷 / 04期

基金：

中国国家自然科学基金;

关键词：

current rectification; molecular devices; nanostructures; phase transitions; temperature responsive; SOLID-STATE NANOPORES; ION-TRANSPORT SELECTIVITY; NANOFLUIDIC DIODE; POLYMER BRUSHES; ELECTROKINETIC CHARACTERIZATION; NANOTUBULE MEMBRANES; GATED TRANSPORT; COLLOIDAL FILMS; GOLD; DNA;

D O I：

10.1002/cphc.200900989

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Herein we demonstrate a fully abiotic smart single-nanopore device that rectifies ionic current in response to the temperature. The temperature-responsive nanopore ionic rectifier can be switched between a rectifying state below 34 degrees C and a non-rectifying state above 38 degrees C actuated by the phase transition of the poly(N-isopropylacrylamide) (PNIPAM] brushes. On the rectifying state, the rectifying efficiency can be enhanced by the dehydration of the attached PNIPAM brushes below the LCST. When the PNIPAM brushes have sufficiently collapsed, the nanopore switches to the non-rectifying state. The concept of the temperature-responsive current rectification in chemically-modified nanopores paves a new way for controlling the preferential direction of the ion transport in nanofluidics by modulating the temperature, which has the potential to build novel nanomachines with smart fluidic communication functions for future lab-on-chip devices.

引用

页码：859 / 864

页数：6

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