Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 3, 2005
Previous Article Next Article

Femtosecond transient absorption spectroscopy of single-walled carbon nanotubes in aqueous surfactant suspensions: Determination of the lifetime of the lowest excited state

Author affiliations

Abstract

Femtosecond one- and two-colour pump–probe spectroscopy of single-walled carbon nanotubes (SWNTs) individual in aqueous surfactant suspensions has been used to assess the “intrinsic” lifetime of the lowest excited states. We demonstrate that such measurements can be perturbed by several competing photophysical processes thus making lifetime deconvolution difficult. Furthermore we show how these effects, arising primarily from sample heterogeneity, can be reduced. Measurements of induced transients in the near IR yield lifetimes of (35 ± 10) ps and (56 ± 10) ps, for nanotubes having mean diameters of 0.95 and 1.2 nm, respectively. Furthermore, a fast decay component in the ps to sub-ps regime is also observed. We tentatively attribute this to relaxation in SWNT bundle components.

Graphical abstract: Femtosecond transient absorption spectroscopy of single-walled carbon nanotubes in aqueous surfactant suspensions: Determination of the lifetime of the lowest excited state

Back to tab navigation

Article information


Submitted
06 Oct 2004
Accepted
23 Nov 2004
First published
17 Dec 2004

Phys. Chem. Chem. Phys., 2005,7, 512-517
Article type
Paper

Femtosecond transient absorption spectroscopy of single-walled carbon nanotubes in aqueous surfactant suspensions: Determination of the lifetime of the lowest excited state

J.-P. Yang, M. M. Kappes, H. Hippler and A.-N. Unterreiner, Phys. Chem. Chem. Phys., 2005, 7, 512
DOI: 10.1039/B415524F

Social activity

Search articles by author

Spotlight

Advertisements