Refined carbothermal reduction approach for large scale, uniform growth of vertically aligned ZnO nanowires
✍ Scribed by Lee, Ji-Seung ;Lee, Dong-Kyoon ;Kim, Jaehyun ;Kim, Junghan ;Yang, Heesun
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 430 KB
- Volume
- 207
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
Abstract
For a large scale, uniform growth of vertically well‐aligned zinc oxide (ZnO) nanowires (NWs), a carbothermal reduction process was refined. Depending on how ZnO and graphite powders are loaded, i.e., stacked versus mixed states, the NWs show strikingly different growth behaviors. A newly introduced ZnO/graphite stacked source was found to be superior to a conventional mixed source with respect to the degree of vertical alignment and uniformity presumably due to the controlled (steady, slow) generation of Zn species at the ZnO/graphite boundaries. Effects of growth temperature, Ar gas flow, and weight of source materials on growth behaviors of ZnO NWs are investigated, and their optical and structural properties are characterized.