Invited Presentation: Photoluminescence Imaging Probes of Contrasting 1-D and 0-D Exciton Behavior in Doped Carbon Nanotubes

Introduction of new photoluminescent (PL) states upon low-level covalent doping of carbon nanotubes^1,2 is gaining interest due to their chemical stability and potential for tube brightening.  The nature of these optical states is not yet well-understood.  We present PL imaging and spectroscopic studies of oxygen-doped tubes¹ at the single-tube and single-dopant site levels.  Dynamic and static emission behaviors will be presented as modulated by the relative dopant concentration.  Results will be discussed as the interplay of 1-D bright exciton behaviors and 0-D trap states introduced at the dopant sites.

1.  S. Ghosh, et al., Science, 330, 1656 (2010).

2.  Y. Piao, et al., Nature Chem., 5, 840 (2013).