Chirality-controlled synthesis of single-wall carbon nanotubes using vapour-phase epitaxy

Jia Liu, Chuan Wang, Xiaomin Tu, Bilu Liu, Liang Chen, Ming Zheng () and Chongwu Zhou ()
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Jia Liu: University of Southern California
Chuan Wang: University of Southern California
Xiaomin Tu: National Institute of Standards and Technology
Bilu Liu: University of Southern California
Liang Chen: University of Southern California
Ming Zheng: National Institute of Standards and Technology
Chongwu Zhou: University of Southern California

Nature Communications, 2012, vol. 3, issue 1, 1-7

Abstract: Abstract Chirality-controlled synthesis of single-wall carbon nanotubes with predefined chiralities has been an important but elusive goal for almost two decades. Here we demonstrate a general strategy for producing carbon nanotubes with predefined chiralities by using purified single-chirality nanotubes as seeds for subsequent metal catalyst free growth, resembling vapour-phase epitaxy commonly used for semiconductor films. In particular, we have successfully synthesized (7, 6), (6, 5) and (7, 7) nanotubes, and used Raman spectroscopy to show unambiguously that the original chiralities of the nanotube seeds are preserved. Furthermore, we have performed electrical measurements on synthesized individual (7, 6) and (6, 5) nanotubes, confirming their semiconducting nature. The vapour-phase epitaxy approach is found to be highly robust and should enable a wide range of fundamental studies and technological developments.

Date: 2012
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DOI: 10.1038/ncomms2205

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