Self-formation of highly aligned metallic, semiconducting and single chiral single-walled carbon nanotubes assemblies via a crystal template method

Hideki Kawai, Kai Hasegawa, Ayako Oyane, Yasuhisa Naitoh, Kazuhiro Yanagi

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2 Citations (Scopus)


The fabrication of an aligned array of single-walled carbon nanotubes (SWCNTs) with a single chiral state has been a significant challenge for SWCNT applications as well as for basic science research. Here, we developed a simple, unique technique to produce assemblies in which metallic, semiconducting, and single chiral state SWCNTs were densely and highly aligned. We utilized a crystal of surfactant as a template on which mono-dispersed SWCNTs in solution self-assembled. Micro-Raman measurements and scanning electron microscopy measurements clearly showed that the SWCNTs were highly and densely aligned parallel to the crystal axis, indicating that approximately 70% of the SWCNTs were within 7° of being parallel. Moreover, the assemblies exhibited good field effect transistor characteristics with an on/off ratio of 1.3×105.

Original languageEnglish
Article number093102
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 2014 Sep 1
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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