Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications
- Authors
- Rai, Prabhakar; Jeon, Seung-Ho; Lee, Chung-Hyun; Lee, Jong-Heun; Yu, Yeon-Tae
- Issue Date
- 2014
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- RSC ADVANCES, v.4, no.45, pp.23604 - 23609
- Indexed
- SCIE
SCOPUS
- Journal Title
- RSC ADVANCES
- Volume
- 4
- Number
- 45
- Start Page
- 23604
- End Page
- 23609
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/101241
- DOI
- 10.1039/c4ra00078a
- ISSN
- 2046-2069
- Abstract
- This study reports the functionalization of ZnO nanorods (NRs) through spike-shaped CuO nanoparticles (NPs) to create a nanosized p-n junction, their structural properties, and the mechanism by which bundles of these NRs are able to sense CO gas. The CuO NPs were deposited on solvothermally grown ZnO NRs by a chemical bath deposition method. The formation of the highly crystalline heterogeneous nanostructure of the ZnO NRs was confirmed by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the p-n junction on CO sensing behavior of ZnO NRs was evaluated in dry air. The response of ZnO NRs sensors to CO was enhanced after loading with CuO NPs. The role of catalyst NPs is explained by both a collective-and a local-site approach, in which deposition of catalyst NPs changed the overall band structure and surface chemistry of the ZnO matrix.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.