Issue 48, 2006
From the journal:

Physical Chemistry Chemical Physics

Temperature effects on femtosecond transient absorption kinetics of semiconducting single-walled carbon nanotubes

Ying-Zhong Ma,a   Leonas Valkunas,ab   Sergei M. Bachiloc  and  Graham R. Fleming*a  

* Corresponding authors

a Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, USA
E-mail: GRFleming@lbl.gov
Fax: 510-642-6340
Tel: 510-643-2735

b Institute of Physics, Savanoriu Ave. 231, 02300 Vilnius, Lithuania and Theoretical Physics Department, Faculty of Physics of Vilnius University, Sauletekio Ave. 9, build. 3, Lithuania

c Department of Chemistry, and Center for Biological and Environmental Nanotechnology, Rice University, 6100 Main Street, Houston, USA

Abstract

We report femtosecond transient absorption kinetics measured for selected semiconducting single-walled carbon nanotubes at different temperatures between 77 and 290 K. The nanotubes are embedded in a thin polymethylmethacrylate film, and the dominance of individual species enabled to probe selectively the kinetics associated with two desired tube types, the (6,5) and (7,5) tubes. A strikingly similar temperature dependence is found between the maximum change in the amplitude of transient absorption kinetics, the overall decay time and steady-state fluorescence emission intensity. The simplest explanation for our data is that the temperature dependence of the fluorescence intensity and the exciton decay kinetics are dominated by nonradiative decay and that the radiative decay rate is weakly temperature dependent.

Graphical abstract: Temperature effects on femtosecond transient absorption kinetics of semiconducting single-walled carbon nanotubes

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Article information

DOI
https://doi.org/10.1039/B612207H
Article type
Paper
Submitted
24 Aug 2006
Accepted
03 Nov 2006
First published
20 Nov 2006

Phys. Chem. Chem. Phys., 2006,8, 5689-5693

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Temperature effects on femtosecond transient absorption kinetics of semiconducting single-walled carbon nanotubes

Y. Ma, L. Valkunas, S. M. Bachilo and G. R. Fleming, Phys. Chem. Chem. Phys., 2006, 8, 5689 DOI: 10.1039/B612207H

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