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作者单位:Sunghoon Park (1) Soohyun Kim (1) Gun-Joo Sun (1) Seung-Bok Choi (2) Sangmin Lee (3) Chongmu Lee (1)
1. Department of Materials Science and Engineering, Inha University, Incheon, 402-751, Korea 2. Department of Mechanical Engineering, Inha University, Incheon, 402-751, Korea 3. Department of Electrical Engineering, Inha University, Incheon, 402-751, Korea
刊物类别:Chemistry and Materials Science
刊物主题:Condensed Matter Physics Electronics, Microelectronics and Instrumentation Optical and Electronic Materials Thermodynamics Characterization and Evaluation of Materials
出版者:The Korean Institute of Metals and Materials, co-published with Springer Netherlands
ISSN:2093-6788
文摘
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.