Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 1, Issue 46, Pages 7703-7708Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3tc30750f
Keywords
-
Funding
- Chongqing Natural Science Foundation of China (CSTC) [2009BA4027]
- CSIRO's OCE Science Leadership Scheme
- Australian Research Council
- National Natural Science Foundation of China [11004004]
- Beijing Municipal Natural Science Foundation [1112004]
Ask authors/readers for more resources
Carbon nanorods and graphene-like nanosheets are catalytically synthesized in a hot filament chemical vapor deposition system with and without plasma enhancement, with gold used as a catalyst. The morphological and structural properties of the carbon nanorods and nanosheets are investigated by field-emission scanning electron microscopy, transmission electron microscopy and micro-Raman spectroscopy. It is found that carbon nanorods are formed when a CH4 + H-2 + N-2 plasma is present while carbon nanosheets are formed in a methane environment without a plasma. The formation of carbon nanorods and carbon nanosheets are analyzed. The results suggest that the formation of carbon nanorods is primarily a precipitation process while the formation of carbon nanosheets is a complex process involving surface-catalysis, surface diffusion and precipitation influenced by the Gibbs-Thomson effect. The electron field emission properties of the carbon nanorods and graphene-like nanosheets are measured under high-vacuum; it is found that the carbon nanosheets have a lower field emission turn-on than the carbon nanorods. These results are important to improve the understanding of formation mechanisms of carbon nanomaterials and contribute to eventual applications of these structures in nanodevices.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available