Fabrication of a novel hierarchical assembly of ZnO nanowires on WO(x) nanowhiskers for highly efficient field electron emission
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SCOPUS
- Title
- Fabrication of a novel hierarchical assembly of ZnO nanowires on WO(x) nanowhiskers for highly efficient field electron emission
- Authors
- Kim, H; Jeon, S; Lee, M; Lee, J; Yong, K
- Date Issued
- 2011-01
- Publisher
- ROYAL SOC CHEMISTRY
- Abstract
- A novel hierarchical heteronanostructure of ZnO nanowires/WOx nanowhiskers was fabricated using a simple two-step process called the thermal evaporation and solution reaction. A high density of thin ZnO nanowires was uniformly deposited on a WOx nanowhisker backbone. The density and morphology of the ZnO nanowires were observed to be tunable as a function of reaction parameters, such as reaction time, growth temperature and solution composition. A solution-mediated solid ( SS) growth mechanism was proposed for the formation of the ZnO/WOx hierarchical heteronanostructures. The developed schematic model is consistent with the experimental results as shown in SEM and TEM analyses. Our hierarchical ZnO/WOx heteronanostructures demonstrated enhanced field electron emission properties in comparison to pristine WOx nanowhiskers. The turn-on-field voltage and field enhancement factor were comparable to other nanostructured materials, suggesting that ZnO/WOx hierarchical nanostructures are promising electron emitters in future field emission devices.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/10948
- DOI
- 10.1039/C1JM12224J
- ISSN
- 0959-9428
- Article Type
- Article
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, vol. 21, no. 35, page. 13458 - 13463, 2011-01
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