Web Release Date: February 18,
Spectroscopy of Single- and Double-Wall Carbon Nanotubes in Different Environments
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Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee, Department of Physical Chemistry, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany, Max-Born-Institute, Berlin, Germany Karlsruhe, Institut für Nanotechnologie, Karlsruhe, Germany, Department of Chemistry, Vanderbilt University, Nashville, Tennessee, and Forschungszentrum CIRIMAT/LCMIE, UMR CNRS 5085, Université Paul Sabatier, Toulouse, France
Received January 13, 2005
Revised January 30, 2005
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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