Fabrication of ZnO/CdS, ZnO/CdO core/shell nanorod arrays and investigation of their ethanol gas sensing properties
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SCOPUS
- Title
- Fabrication of ZnO/CdS, ZnO/CdO core/shell nanorod arrays and investigation of their ethanol gas sensing properties
- Authors
- Kim, Wooseok; Baek, Minki; YONG, KIJUNG
- Date Issued
- 2016-02
- Publisher
- ELSEVIER SCIENCE SA
- Abstract
- The sensing properties of ZnO/CdS and ZnO/Cd0 core/shell nanorod arrays were studied for ethanol gas sensing. ZnO nanorod arrays were synthesized on sputtered ZnO films through a simple hydrothermal method, and CdS films were then deposited on the ZnO nanorods by successive ionic layer adsorption and reaction (SILAR). After air annealing of the ZnO/CdS core/shell nanorods at 400 degrees C for 2h, the CdS films were converted to CdO films. Using scanning electron microscopy (SEM), X-ray diffraction (XRD), transmission electron microscopy (TEM) and diffused reflectance spectroscopy (DRS), ZnO/CdS and ZnO/CdO core/shell nanorod heterostructures were characterized. With respect to ethanol gas sensing, the ZnO/CdO core/shell nanorods exhibited highly enhanced responses compared to those of the ZnO/CdS core/shell nanorods. Based on the gas sensing mechanism, the effects of CdS and CdO shells on ZnO nanorod array gas sensors were discussed.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/41312
- DOI
- 10.1016/j.snb.2015.09.158
- ISSN
- 0925-4005
- Article Type
- Article
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, vol. 223, page. 599 - 605, 2016-02
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