A Hybrid Nanosensor for TNT Vapor Detection

被引：91

作者：

Aguilar, Alvaro Diaz ^{[1
,2
]}

Forzani, Erica S. ^{[1
,2
]}

Leright, Mathew ^{[1
,2
]}

Tsow, Francis ^{[1
,2
]}

Cagan, Avi ^{[1
,2
]}

Iglesias, Rodrigo A. ^{[1
,2
]}

Nagahara, Larry A. ^{[3
]}

Amlani, Islamshah ^{[3
]}

Tsui, Raymond ^{[3
]}

Tao, N. J. ^{[1
,2
]}

机构：

[1] Arizona State Univ, Ctr Bioelect & Biosensors, Biodesign Inst, Tempe, AZ 85287 USA

[2] Arizona State Univ, Dept Elect Engn, Tempe, AZ 85287 USA

[3] Motorola Labs, Embedded Syst Res Ctr, Tempe, AZ 85284 USA

来源：

NANO LETTERS | 2010年 / 10卷 / 02期

基金：

美国国家科学基金会;

关键词：

Nanosensors; explosive detection; nanowires; conducting polymers; hybrid sensors; TEMPERATURE IONIC LIQUIDS; MOBILITY SPECTROMETRY; EXPLOSIVES; SENSOR; INSTRUMENTATION; REDUCTION;

D O I：

10.1021/nl902382s

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Real-time detection of trace chemicals, such as explosives, in a complex environment containing various interferents has been a difficult challenge. We describe here a hybrid nanosensor based on the electrochemical reduction of TNT and the interaction of the reduction products with conducting polymer nanojunctions in an ionic liquid. The sensor simultaneously measures the electrochemical current from the reduction of TNT and the conductance change of the polymer nanojunction caused from the reduction product. The hybrid detection mechanism, together with the unique selective preconcentration capability of the ionic liquid, provides a selective, fast, and sensitive detection of TNT. The sensor, in its current form, is capable of detecting parts-per-trillion level TNT in the presence of various interferents within a few minutes.

引用

页码：380 / 384

页数：5

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