Chiral-angle distribution for separated single-walled carbon nanotubes

Nano Letters
Yuta SatoSumio Iijima

Abstract

Chiral indices (n, m) of metallic and semiconducting single-walled carbon nanotubes (SWNTs) selectively separated via the density-gradient ultracentrifugation process were individually assigned by using an aberration-corrected transmission electron microscope (TEM) operated at 80 kV. Our statistical analysis revealed that armchair (n, n) and chiral (n, n-3) SWNTs with large chiral angles (>20 degrees) are dominant metallic nanotubes in the separated samples, whereas such a noticeable preference of particular indices was not observed for semiconducting nanotubes. Some significant discrepancies were found between the TEM and spectroscopic results on the major chiral indices and the metal/semiconductor ratios in these SWNTs.

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Oct 4, 2011·Nature Materials·Jamie H WarnerG Andrew D Briggs
Jul 8, 2015·Scientific Reports·D MatsumotoK Marumoto
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May 26, 2009·ACS Nano·Jamie H WarnerG Andrew D Briggs

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