Ethanol sensing of SnO2-WO3 core/shell nanowires

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• 作者：Sunghoon Park ; Soohyun Kim ; Gun-Joo Sun ; Seung-Bok Choi…
• 关键词：SnO2 ; WO3 ; nanowires ; ethanol ; gas sensor
• 刊名：Electronic Materials Letters
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：11
• 期：5
• 页码：896-901
• 全文大小：858 KB
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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.