Published April 1, 1996
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Journal Article
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Polyyne Ring Nucleus Growth Model for Single-Layer Carbon Nanotubes
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1.
California Institute of Technology
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2.
IBM Research - Almaden
Chicago
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Abstract
We propose, based on recent experimental results, a polyyne ring nucleus (PRN) growth model for the synthesis of single-layer nanotubes (SLN's). The PRN model assumes that (i) the critical nuclei are the planar carbon polyyne rings that are observed to be most stable for sizes in the range C10 to C40; (ii) ComCn clusters (possibly charged) play the role of a catalyst by serving to add C2 or other gas phase species into the growing tube; (iii) promoters such as S, Bi, and Pb serve to modify the rates for these processes by stabilizing the ring structure. We suggest experiments to test and amplify this PRN model, including a flow tube arrangement that might be useful for synthesizing more uniform SLN's.
Additional Information
©1996 The American Physical Society Received 24 October 1995 We thank Dr. D. S. Bethune and Dr. R. Beyers of IBM Almanden Research Center for helpful discussions. The research was funded by DOE-BCTR and by NSF (CHE 94-13930 and ASC 92-100368). The facilities of the MSC are also supported by grants from Aramco, Asahi Chemical, Asahi Glass, BP Chemical, Chevron Petroleum Technology, Chevron Chemical Company, Xerox, Hughes Research Lab., Owens-Corning, and Beckman Institute.Files
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