Ethanol Sensing of SnO2-WO3 Core/Shell Nanowires

被引：4

作者：

Park, Sunghoon ^{[1
]}

Kim, Soohyun ^{[1
]}

Sun, Gun-Joo ^{[1
]}

Choi, Seung-Bok ^{[2
]}

Lee, Sangmin ^{[3
]}

Lee, Chongmu ^{[1
]}

机构：

[1] Inha Univ, Dept Mat Sci & Engn, Inchon 402751, South Korea

[2] Inha Univ, Dept Mech Engn, Inchon 402751, South Korea

[3] Inha Univ, Dept Elect Engn, Inchon 402751, South Korea

来源：

ELECTRONIC MATERIALS LETTERS | 2015年 / 11卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

SnO2; WO3; nanowires; ethanol; gas sensor; GAS; SENSORS;

D O I：

10.1007/s13391-015-4498-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

SnO2-WO3 core/shell nanowires were synthesized by the thermal evaporation of Sn powders in an oxidizing ambient followed by the thermal evaporation of WO3 powders. Their C2H5OH gas sensing properties were then examined. The C2H5OH gas sensing properties were improved remarkably by formation of the SnO2-WO3 heterostructures. The SnO2-WO3 core/shell nanowire sensors showed a much stronger and faster response to C2H5OH gas than the pristine SnO2 nanowire sensors. The enhanced sensing performance of the SnO2-WO3 core/shell nanowires towards C2H5OH gas can be accounted for by the potential barrier-controlled carrier-transport mechanism combined with the surface-depletion mechanism.

引用

页码：896 / 901

页数：6

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