Ultrathin percolated WO3 cluster film and its resistive response to H2

被引：8

作者：

Zhao, Meng ^{[1
,2
,3
]}

Wong, Man Hon ^{[2
,3
]}

Huang, Jian Xing ^{[2
,3
]}

Ong, Chung Wo ^{[2
,3
]}

机构：

[1] Suzhou Univ Sci & Technol, Sch Math & Phys, Res Ctr Solid State Phys & Mat, Suzhou 215009, Peoples R China

[2] Hong Kong Polytech Univ, Dept Appl Phys, Kowloon, Hong Kong, Peoples R China

[3] Hong Kong Polytech Univ, Mat Res Ctr, Kowloon, Hong Kong, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 612卷

关键词：

Tungsten oxide nanoclusters; Ultrathin percolated network; Hydrogen sensing properties; HYDROGEN SENSING CHARACTERISTICS; ROOM-TEMPERATURE; THIN-FILM; TUNGSTEN TRIOXIDE; CRYSTAL-STRUCTURE; GAS; PERFORMANCE; SENSORS; DEPENDENCE; NANORODS;

D O I：

10.1016/j.jallcom.2014.05.108

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thin films composed of tungsten oxide (WO3) nanoclusters were fabricated by oxidizing supersonic cluster beam deposited tungsten films at various temperatures. Oxidation at 700 degrees C resulted in aggregation of the deposits, forming a percolated network of WO3 spherical caps connected by fine links. The resistance response of the palladium-(Pd-) coated film sample to hydrogen (H-2) was investigated. The response rate was faster than those of other samples oxidized at lower temperatures. This is the result of the rapid electrical switching of the intercluster links between the highly resistive depleted state and conducting hydrogenated state. The possibility of improving the H-2 sensing response rate with the use of the percolated WO3 film structure is illustrated. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：163 / 169

页数：7

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