NO2 sensing properties of WO3 nanorods grown on mica

被引：5

作者：

El Achhab, Mhamed ^{[1
]}

Shanak, Hussein ^{[2
]}

Schierbaum, Klaus ^{[1
]}

机构：

[1] Univ Dusseldorf, Abt Mat Wissensch, D-40225 Dusseldorf, Germany

[2] Univ Dusseldorf, Inst Expt Phys Kondensierten Materie, Lehrstuhl Festkorperphys, D-40225 Dusseldorf, Germany

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2011年 / 208卷 / 06期

关键词：

chemical sensors; NO2 detection in air; WO3; nanowires; ELECTRICAL-PROPERTIES; GAS; NANOWIRES;

D O I：

10.1002/pssa.201000960

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

One-dimensional nanostructures of tungsten trioxide were prepared by a simple chemical vapour deposition technique. WO3 is sublimated onto cleaved (0001) oriented mica substrates in air at atmospheric pressure. We obtained needle-type crystals ('nanorods'), epitaxially oriented in three directions along the principal symmetry axes of mica. Their morphology was investigated with atomic force microscopy (AFM). The WO3 structures were electrically contacted by means of four gold electrodes which were fabricated by optical lithography. In our experiments, we have analysed the NO2 sensing properties in a gas-flow system with respect to stability, operation regimes, response and decay times, as well as cross-sensitivity towards humidity. (C) 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1229 / 1234

页数：6

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