Modulation of Electron Tunneling in a Nanoparticle Array by Sound Waves: An Avenue to High-Speed, High-Sensitivity Sensors

被引：8

作者：

Berry, Vikas ^{[2
]}

Saraf, Ravi F. ^{[1
]}

机构：

[1] Univ Nebraska, Dept Chem & Biomol Engn, Lincoln, NE 68588 USA

[2] Kansas State Univ, Dept Chem Engn, Manhattan, KS 66506 USA

来源：

SMALL | 2011年 / 7卷 / 17期

基金：

美国国家科学基金会;

关键词：

ELECTROCHEMICAL DETECTION; CARBON NANOTUBE; DEVICES; SILICON; FABRICATION; BIOSENSORS; MONOLAYER; NANOWIRES; BACTERIA; NEURONS;

D O I：

10.1002/smll.201100519

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Using an electrostatic self-assembly process, metal nanoparticles are deposited on polyelectrolyte fibers such that the interparticle distance between the nanoparticles is comparable to the polyelectrolyte's molecular width. By modulating the dielectric properties of the interparticle polymer layer, a highly sensitive, reversible humidity sensor with an ultrafast response time of approximate to 3 ms is demonstrated. The higher sensitivity at low humidity shows a conductivity increase by over two orders of magnitude in response to a change in relative humidity from 21 to 1%.

引用

页码：2485 / 2490

页数：6

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