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Co3O4 Nanostructures with Different Morphologies and their Field‐Emission Properties
Abstract
We report an efficient method to synthesize vertically aligned Co 3 O 4 nanostructures on the surface of cobalt foils. This synthesis is accomplished by simply heating the cobalt foils in the presence of oxygen gas. The resultant morphologies of the nanostructures can be tailored to be either one‐dimensional nanowires or two‐dimensional nanowalls by controlling the reactivity and the diffusion rate of the oxygen species during the growth process. A possible growth mechanism governing the formation of such nanostructures is discussed. The field‐emission properties of the as‐synthesized nanostructures are investigated in detail. The turn‐on field was determined to be 6.4 and 7.7 V μm–1 for nanowires and nanowalls, respectively. The nanowire samples show superior field‐emission characteristics with a lower turn‐on field and higher current density because of their sharp tip geometry and high aspect ratio.
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Cited by
Partially oxidized atomic cobalt layers for carbon dioxide electroreduction to liquid fuel
Gao, S., Lin, Y., Jiao, X., Sun, Y., Luo, Q., Zhang, W., Li, D., Yang, J., & Xie, Y. (2016) · Nature · doi:10.1038/nature16455 · Cited by 1,865
Shape-controlled synthesis of porous Co3O4 nanostructures for application in supercapacitors
Zhu, T., Chen, J. S., & Lou, X. W. (2010) · Journal of Materials Chemistry · doi:10.1039/c0jm00867b · Cited by 363
Wang, Y., Xia, H., Lu, L., & Lin, J. (2010) · ACS Nano · doi:10.1021/nn9012675 · Cited by 276
Morphology control of cobalt oxide nanocrystals for promoting their catalytic performance
Xie, X., & Shen, W. (2009) · Nanoscale · doi:10.1039/b9nr00155g · Cited by 272
Metadata
- Authors
- Varghese, B., Teo, C. H., Zhu, Y., Reddy, M. V., Chowdari, B. V. R., Wee, A. T. S., Tan, V. B. C., Lim, C. T., & Sow, C. ‐.
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2007-07-10
- Volume
- 17
- Issue
- 12
- Pages
- 1932-1939
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2093189607
- Cited by
- 327
- References
- 0
- FWCI
- 7.32
- Type
- journal article
- Language
- en
- Open access
- closed
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- Varghese, B., Teo, C. H., Zhu, Y., Reddy, M. V., Chowdari, B. V. R., Wee, A. T. S., Tan, V. B. C., Lim, C. T., & Sow, C. ‐. (2007). Co3O4 Nanostructures with Different Morphologies and their Field‐Emission Properties. Advanced Functional Materials. https://doi.org/10.1002/adfm.200700038
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