Issue 48, 2006

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

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

Article information

Article type
Paper
Submitted
24 Aug 2006
Accepted
03 Nov 2006
First published
20 Nov 2006

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

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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