Self-heated hydrogen gas sensors based on Pt-coated W18O49 nanowire networks with high sensitivity, good selectivity and low power consumption

被引：100

作者：

Zhu, Lian Feng ^{[1
]}

She, Jun Cong ^{[1
]}

Luo, Jian Yi ^{[1
]}

Deng, Shao Zhi ^{[1
]}

Chen, Jun ^{[1
]}

Ji, Xue Wen ^{[2
]}

Xu, Ning Sheng ^{[1
]}

机构：

[1] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangdong Prov Key Lab Display Mat & Technol, Sch Phys & Engn, Guangzhou 510275, Guangdong, Peoples R China

[2] ShenZhen Dovelet Sensors Technol Co Ltd, Shenzhen 518057, Guangdong, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2011年 / 153卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Gas sensor; Nanowire; Tungsten oxide; Self-heated device; Hydrogen; Hydrogen sensor; SENSING PROPERTIES; ROOM-TEMPERATURE; ZNO NANORODS; DOPED SNO2; ETHANOL; MICROSTRUCTURE; PERFORMANCE;

D O I：

10.1016/j.snb.2010.10.047

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Self-heating effect can be applied to develop gas sensors avoiding use of external heaters. We report here a prototype self-heated hydrogen gas sensor based on Pt-coated W18O49 nanowire networks. Such a sensor has been shown to have promising performance, e.g., high sensitivity (able to detect down to 50 ppm of H-2), good selectivity (poor response to ethanol, CH4, CO, and C3H8), and low power consumption of 30-60 mW at 6 V compatible to a portable device. Coaxial cable model and percolation theory are applied to explain the gas sensing effect of the Pt-coated W18O49 nanowire networks. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：354 / 360

页数：7

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