The University of Toledo

Associated Faculty: Randy J. Ellingson ,Michael J. Heben, Adam B. Philips

Surfactant free thin films of single-wall carbon nanotubes (SWNTs) have been prepared and their spectral and time resolved transient absorption signatures have been evaluated within the region of their first exciton (E1) absorption.

Doped samples show a stable bleaching of the E1 absorption which reveals a transient photoinduced absorption due to the excited state transition from the E1 to the E2 excitonic states.

Baked samples show recovery of the intrinsic optical properties of our SWNTs with a uniform transient photoinduced bleach over the whole E1 spectral region.