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Cu/CuO@ZnO Hollow Nanofiber Gas Sensor: Effect of Hollow Nanofiber Structure and P–N Junction on Operating Temperature and Sensitivity

Title
Cu/CuO@ZnO Hollow Nanofiber Gas Sensor: Effect of Hollow Nanofiber Structure and P–N Junction on Operating Temperature and Sensitivity
Authors
Hwang, Sung-HoKim, Young KwangHong, Seong HuiLim, Sang Kyoo
DGIST Authors
Hwang, Sung-Ho; Kim, Young Kwang; Hong, Seong Hui; Lim, Sang Kyoo
Issue Date
2019-07
Citation
Sensors, 19(14), 3151
Type
Article
Article Type
Article
Author Keywords
electrospinningphotodepositionZnO hollow nanofiberCuCuOp-n junctionCO gas sensor
Keywords
SENSING CHARACTERISTICSCARBON NANOFIBERSFILMCUPERFORMANCENANOCOMPOSITES
ISSN
1424-8220
Abstract
For the fast and easy detection of carbon monoxide (CO) gas, it was necessary to develop a CO gas sensor to operate in low temperatures. Herein, a novel Cu/CuO-decorated ZnO hollow nanofiber was prepared with the electrospinning, calcination, and photodeposition methods. In the presence of 100 ppm CO gas, the Cu/CuO-photodeposited ZnO hollow nanofiber (Cu/CuO@ZnO HNF) showed twice higher sensitivity than that of pure ZnO nanofiber at a relatively low working temperature of 300◦ C. The hollow structure and p–n junction between Cu/CuO and ZnO would be considered to contribute to the enhancement of sensitivity to CO gas at 300◦ C due to the improved specific surface area and efficient electron transfer. © 2019 by the authors. Licensee MDPI, Basel, Switzerland. T.
URI
http://hdl.handle.net/20.500.11750/10392
DOI
10.3390/s19143151
Publisher
MDPI AG
Related Researcher
Files:
Collection:
Division of Energy Technology1. Journal Articles


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