Toward the nanospring-based artificial olfactory system for trace-detection of flammable and explosive vapors

被引：36

作者：

Dobrokhotov, Vladimir ^{[1
]}

Oakes, Landon ^{[1
]}

Sowell, Dewayne ^{[1
]}

Larin, Alexander ^{[1
]}

Hall, Jessica ^{[1
]}

Kengne, Alex ^{[2
]}

Bakharev, Pavel ^{[2
]}

Corti, Giancarlo ^{[2
]}

Cantrell, Timothy ^{[3
]}

Prakash, Tej ^{[2
]}

Williams, Joseph ^{[4
,5
]}

McIlroy, D. N. ^{[2
]}

机构：

[1] Western Kentucky Univ, Dept Phys & Astron, Bowling Green, KY 42101 USA

[2] Univ Idaho, Dept Phys, Moscow, ID 83844 USA

[3] GoNano Technol, Moscow, ID 83843 USA

[4] Univ Louisville, Nanotechnol Ctr, Louisville, KY 40292 USA

[5] Univ Louisville, ElectroOpt Res Inst, Louisville, KY 40292 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2012年 / 168卷

关键词：

Nanosprings; Chemiresistors; Nanoparticles; THIN-FILM; GAS SENSORS; ELECTRONIC NOSE; ZNO; NANOWIRE; ARRAYS; DISCRIMINATION; CONDUCTIVITY; SENSITIVITY; ADSORPTION;

D O I：

10.1016/j.snb.2012.03.074

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Chemical sensors were fabricated on the basis of novel nanomaterials - silica nanosprings. High chemical sensitivity was achieved by coating the silica nanosprings with ZnO using atomic layer deposition (ALD), followed by decorating with metal nanoparticles. The optimum operational conditions (T = 400 degrees C, ZnO grain size 15 nm) were obtained and investigated. The nanospring-based sensors demonstrated remarkable vapor sensing properties: well-defined spikes in conductance upon exposure to explosives (TNT, TATP) and flammable vapors (toluene, acetone, ethanol) were obtained for 0.1 ms exposure times at ppb level. Based on surface doping of ZnO with various metallic nanoparticles, a discrimination mechanism was developed and an integrated sensor-array for simultaneous real-time resistance scans was built. The integrated sensor response was tested using linear discriminant analysis (LDA). The distinguished electronic signatures of various chemical vapors were obtained at ppm level. (C) 2012 Elsevier BM. All rights reserved.

引用

页码：138 / 148

页数：11

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