The Unique Origin of Colors of Armchair Carbon Nanotubes

Details The Unique Origin of Colors of Armchair Carbon Nanotubes The Unique Origin of Colors of Armchair Carbon Nanotubes

2011-09-11

arxiv.org/abs/1109.2333v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures

Scientific paper

The colors of suspended metallic colloidal particles are determined by their size-dependent plasma resonance, while those of semiconducting colloidal particles are determined by their size-dependent band gap. Here, we present a novel case for armchair carbon nanotubes, suspended in aqueous medium, for which the color depends on their size-dependent excitonic resonance, even though the individual particles are metallic. We observe distinct colors of a series of armchair-enriched nanotube suspensions, highlighting the unique coloration mechanism of these one-dimensional metals.

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