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Atomically Resolved STM Images of CVD Grown Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Daniel Chiang ,
Philip Zifeng Lei ,
Lifeng Dong  and
Jun Jiao
Daniel Chiang
Affiliation:
School of Engineering and Computer Science, Washington State University Vancouver, 14204 NE Salmon Creek Avenue, Vancouver, WA 98686–9600
Philip Zifeng Lei
Affiliation:
School of Engineering and Computer Science, Washington State University Vancouver, 14204 NE Salmon Creek Avenue, Vancouver, WA 98686–9600
Lifeng Dong
Affiliation:
Department of Physics, Portland State University, Portland, OR 97207–0751
Jun Jiao
Affiliation:
Department of Physics, Portland State University, Portland, OR 97207–0751
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Abstract

Atomically resolved images of single-wall carbon nanotubes (CNT) grown in a chemical vapor deposition (CVD) chamber were obtained with the scanning tunneling microscope (STM) under ambient conditions. We found that the average diameters d of the CVD-grown CNTs appear to fall into a bimodal distribution of 1.0 and 0.6 nm, and the chiral angle Ø was observed to be close to zero degree. The summation of the lattice indices (n+m) was determined to be 14 and 9 for d= 1.0nm and d= 0.6nm, respectively. The most possible lattice index pairs (n, m) with a chiral angle close to zero degree are (7, 7) and (5, 4), which indicates that the larger nanotubes are metallic and the smaller nanotubes are semi-conductive.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 838: Symposium O – Scanning Probe and Other Novel Microscopies of Local Phenomena in Nanostructured Materials , 2004 , O10.2
Copyright
Copyright © Materials Research Society 2005

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References

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