Abstract
Individual single-wall carbon nanotubes (SWNTs) and double-wall carbon
nanotubes (DWNTs) were suspended in water for optical studies using
sodium-cholate and other surfactants. We used time-resolved
photoluminescence (PL) spectroscopy to study the influence of tube
chirality and diameter as well as of the environment on nonradiative
decay in small diameter tubes. The studies provide evidence for PL from
small diameter core tubes in DWNTs and for a correlation of nonradiative
decay with tube diameter and exciton red shift as induced by interaction
with the environment.
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