Excitation Energy Dependence of the Ultrafast Transient Absorption Response of Single-Wall Carbon Nanotubes

Randy J. Ellingson, Chaiwat Engtrakul, Marcus Jones, Garry Rumbles, Michael J. Heben, Arthur J. Nozik

Research output: Contribution to conferencePaperpeer-review

Abstract

We use sub-picosecond transient absorption spectroscopy to demonstrate selective excitation in a polydisperse aqueous sample of single-wall carbon nanotubes. Tuning the excitation energy above and below the bandgap of a specific semiconducting nanotube produces significant variation in the photoinduced absorption change at the bandgap. Comparing the recovery of the ultrafast photoinduced absorption for metallic and semiconducting nanotubes for excitation above and below the lowest interband transition, we find that metallic SWNTs show a faster recovery. We attribute the faster recovery to the absence of long-lived exciton states in metallic SWNTs.

Original languageAmerican English
Pages415-420
Number of pages6
StatePublished - 2006
Event205th Electrochemical Society Meeting - San Antonio, TX, United States
Duration: 9 May 200414 May 2004

Conference

Conference205th Electrochemical Society Meeting
Country/TerritoryUnited States
CitySan Antonio, TX
Period9/05/0414/05/04

NREL Publication Number

  • NREL/CP-590-38675

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