Measurement of a reaction-diffusion crossover in exciton-exciton recombination inside carbon nanotubes using femtosecond optical absorption
Measurement of a reaction-diffusion crossover in exciton-exciton recombination inside carbon nanotubes using femtosecond optical absorption
Exciton-exciton recombination in isolated semiconducting single-walled carbon nanotubes was studied using femtosecond transient absorption. Under sufficient excitation to saturate the optical absorption, we observed an abrupt transition between reaction- and diffusion-limited kinetics, arising from reactions between incoherent localized excitons with a finite probability of ~0.2 per encounter. This represents the first experimental observation of a crossover between classical and critical kinetics in a 1D coalescing random walk, which is a paradigm for the study of nonequilibrium systems.
1-5
Allam, J.
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Sajjad, M.T.
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Sutton, R.
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Litvinenko, K.
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Wang, Zilong
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Siddique, S.
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Yang, Q.-H.
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Loh, Wei H.
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Brown, T.
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6 November 2013
Allam, J.
53cb4beb-2055-4aea-b477-a47b126e6d1e
Sajjad, M.T.
b24d39ab-3923-43a0-9b1f-f0cce4ca3e37
Sutton, R.
0cb48b6b-30f8-42a9-849d-4c5a3c8dcc0c
Litvinenko, K.
17fc718f-395a-4bc8-930a-8f8556eea836
Wang, Zilong
4f6f5b53-bbc7-4f1f-9803-fbec5b88dc29
Siddique, S.
28862fde-c308-4d07-b541-fb6667220382
Yang, Q.-H.
237b6e73-cf0f-446e-9457-de29ed2cf6ae
Loh, Wei H.
2b7c57fe-000d-4405-a529-810597317ea8
Brown, T.
a64aae36-bb30-42df-88a2-11be394e8c89
Allam, J., Sajjad, M.T., Sutton, R., Litvinenko, K., Wang, Zilong, Siddique, S., Yang, Q.-H., Loh, Wei H. and Brown, T.
(2013)
Measurement of a reaction-diffusion crossover in exciton-exciton recombination inside carbon nanotubes using femtosecond optical absorption.
Physical Review Letters, 111 (19), .
(doi:10.1103/PhysRevLett.111.197401).
(PMID:24266488)
Abstract
Exciton-exciton recombination in isolated semiconducting single-walled carbon nanotubes was studied using femtosecond transient absorption. Under sufficient excitation to saturate the optical absorption, we observed an abrupt transition between reaction- and diffusion-limited kinetics, arising from reactions between incoherent localized excitons with a finite probability of ~0.2 per encounter. This represents the first experimental observation of a crossover between classical and critical kinetics in a 1D coalescing random walk, which is a paradigm for the study of nonequilibrium systems.
Other
PhysRevLett.111.197401
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Available under License Other.
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Published date: 6 November 2013
Organisations:
Optoelectronics Research Centre, Chemistry
Identifiers
Local EPrints ID: 369434
URI: http://eprints.soton.ac.uk/id/eprint/369434
PURE UUID: 9f58633b-d0f3-4d44-bfad-afd5ebff40a1
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Date deposited: 26 Sep 2014 11:32
Last modified: 14 Mar 2024 18:03
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Contributors
Author:
J. Allam
Author:
M.T. Sajjad
Author:
R. Sutton
Author:
K. Litvinenko
Author:
Zilong Wang
Author:
S. Siddique
Author:
Q.-H. Yang
Author:
Wei H. Loh
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