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Decoration of CuO NWs Gas Sensor with ZnO NPs for Improving NO2 Sensing Characteristics.
Han, Tae-Hee; Bak, So-Young; Kim, Sangwoo; Lee, Se Hyeong; Han, Ye-Ji; Yi, Moonsuk.
Afiliação
  • Han TH; Department of Smart Interdisciplinary Engineering, Pusan National University, Busan 46241, Korea.
  • Bak SY; Department of Electronics Engineering, Pusan National University, Busan 46241, Korea.
  • Kim S; Department of Smart Interdisciplinary Engineering, Pusan National University, Busan 46241, Korea.
  • Lee SH; Department of Electronics Engineering, Pusan National University, Busan 46241, Korea.
  • Han YJ; Department of Smart Interdisciplinary Engineering, Pusan National University, Busan 46241, Korea.
  • Yi M; Department of Electronics Engineering, Pusan National University, Busan 46241, Korea.
Sensors (Basel) ; 21(6)2021 Mar 17.
Article em En | MEDLINE | ID: mdl-33802767
This paper introduces a method for improving the sensitivity to NO2 gas of a p-type metal oxide semiconductor gas sensor. The gas sensor was fabricated using CuO nanowires (NWs) grown through thermal oxidation and decorated with ZnO nanoparticles (NPs) using a sol-gel method. The CuO gas sensor with a ZnO heterojunction exhibited better sensitivity to NO2 gas than the pristine CuO gas sensor. The heterojunction in CuO/ZnO gas sensors caused a decrease in the width of the hole accumulation layer (HAL) and an increase in the initial resistance. The possibility to influence the width of the HAL helped improve the NO2 sensing characteristics of the gas sensor. The growth morphology, atomic composition, and crystal structure of the gas sensors were analyzed using field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy, and X-ray diffraction, respectively.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Revista: Sensors (Basel) Ano de publicação: 2021 Tipo de documento: Article