The diffusion of carbon atoms inside carbon nanotubes

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Gan , Y , Kotakoski , J , Krasheninnikov , A V , Nordlund , K & Banhart , F 2008 , ' The diffusion of carbon atoms inside carbon nanotubes ' , New Journal of Physics , vol. 10 , pp. 023022 . https://doi.org/10.1088/1367-2630/10/2/023022

Title: The diffusion of carbon atoms inside carbon nanotubes
Author: Gan, Yanjie; Kotakoski, Jani; Krasheninnikov, Arkady V.; Nordlund, Kai; Banhart, F
Contributor: University of Helsinki, Accelerator Laboratory (Department of Physics) (-2009)
University of Helsinki, Department of Physics
University of Helsinki, Accelerator Laboratory (Department of Physics) (-2009)
Date: 2008
Language: eng
Number of pages: 9
Belongs to series: New Journal of Physics
ISSN: 1367-2630
URI: http://hdl.handle.net/10138/166264
Abstract: We combine electron irradiation experiments in a transmission electron microscope with kinetic Monte Carlo simulations to determine the mobility of interstitial carbon atoms in single-walled carbon nanotubes. We measure the irradiation dose necessary to cut nanotubes repeatedly with a focused electron beam as a function of the separation between the cuts and at different temperatures. As the cutting speed is related to the migration of displaced carbon atoms trapped inside the tube and to their recombination with vacancies, we obtain information about the mobility of the trapped atoms and estimate their migration barrier to be about 0.25 eV. This is an experimental confirmation of the remarkably high mobility of interstitial atoms inside carbon nanotubes, which shows that nanotubes have potential applications as pipelines for the transport of carbon atoms.
Subject: 114 Physical sciences
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