Nanowire structured SnOx-SWNT composites: High performance sensor for NOx detection

被引：122

作者：

Hoa, Nguyen Duc ^{[1
]}

Quy, Nguyen Van ^{[1
]}

Kim, Dojin ^{[1
]}

机构：

[1] Chungnam Natl Univ, Dept Mat Sci & Engn, Taejon 305764, South Korea

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 142卷 / 01期

关键词：

Tin oxide; SWNTs; Nanocomposites; Gas sensors; Selectivity; WALLED CARBON NANOTUBES; THIN-FILMS; TIN; CO; SENSITIVITY; OXYGEN; PHASE;

D O I：

10.1016/j.snb.2009.07.053

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A nanowire structured nanocomposite of tin oxide (SnOx) and a single-walled carbon nanotube (SWNT) are fabricated using rheotaxial growth and thermal oxidation method for gas sensor application. The morphology, gas sensing properties, as well as the chemical and electrical properties are investigated. The oxidation temperature for Sn mainly determines the stoichiometry of the SnOx nano-beads, and consequently the electrical and gas sensing properties of the nanocomposite sensors. The gas sensing to nitrogen oxide, hydrogen, oxygen, xylene, acetone, carbon monoxide, and ammonia are also examined to determine the gas selectivity of the sensor. The high sensitivity and selectivity towards NOx of the nanocomposite sensor is realized via the porous structure of the SWNT template. The gas sensing mechanism of the nanocomposite structure is also discussed. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：253 / 259

页数：7

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