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: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish
Title of host publicationElectron Transfer in Nanomaterials - Proceedings of the International Symposium
Pages415-420
Number of pages6
Publication statusPublished - Oct 16 2006
Event205th Electrochemical Society Meeting - San Antonio, TX, United States
Duration: May 9 2004May 14 2004

Publication series

NameProceedings - Electrochemical Society
VolumePV 2004-22

Other

Other205th Electrochemical Society Meeting
CountryUnited States
CitySan Antonio, TX
Period5/9/045/14/04

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ellingson, R. J., Engtrakul, C., Jones, M., Rumbles, G., Heben, M. J., & Nozik, A. J. (2006). Excitation energy dependence of the ultrafast transient absorption response of single-wall carbon nanotubes. In Electron Transfer in Nanomaterials - Proceedings of the International Symposium (pp. 415-420). (Proceedings - Electrochemical Society; Vol. PV 2004-22).