Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 11, Issue 3, Pages 2344-2348Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2011.3126
Keywords
Carbon Nanocoil; Zeolite; Transmission Electron Microscopy; Electron Tomography
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Funding
- Research Center for Future Technology, Toyohashi University of Technology (TUT)
- Venture Business Laboratory (TUT)
- Ministry of Education, Culture, Sports, Science and Technology (Japan)
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Thin carbon nanocoil (CNC) with a fiber diameter of less than 50 nm was synthesized by catalytic chemical vapor deposition using Fe-Sn catalyst supported on zeolite. The chemical vapor deposition parameters of reaction temperature, gas flow rate of N-2 as dilute gas and C2H2 as source gas were 650-750 degrees C, 1000 ml/min and 50-300 ml/min respectively. Transmission electron microscopic observation revealed that thin CNCs had a hollow and multi-walled structure with cylindrical graphitic layers. More than 90% of the CNCs obtained were multi-walled CNCs (MWCNCs), and the remainder was columnar CNCs without a hollow structure. Three-dimensional images of an MWCNC with Au nanoparticles on its surface were reconstructed by electron tomography and confirmed that the MWCNC had a three-dimensional helical shape.
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