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Issue 4, 2010
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Influence of endohedral water on diameter sorting of single-walled carbon nanotubes by density gradient centrifugation

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Abstract

Separation of single-walled carbon nanotubes (SWNT) by diameter is an important prerequisite for controlled experimental studies and efficient application of these systems. By comparing experimental data with molecular dynamics (MD) simulations, we demonstrate that water filling has a significant, tube-diameter dependent effect on the effective mass density of individual single-walled carbon nanotubes suspended in aqueous surfactant suspensions. We present a model for the effective density of the nanotubesurfactant complex in aqueous solution that permits a comprehensive description of its density across the entire, experimentally relevant range of SWNT diameters. Parameters for this model can be obtained from molecular dynamics simulations and/or experiment and help explain the subtle interplay of surfactant coverage and endohedral water in the separation of a particular diameter species of SWNT by gradient centrifugation.

Graphical abstract: Influence of endohedral water on diameter sorting of single-walled carbon nanotubes by density gradient centrifugation

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Publication details

The article was received on 29 Jun 2009, accepted on 04 Nov 2009 and first published on 02 Dec 2009


Article type: Paper
DOI: 10.1039/B912847F
Citation: Phys. Chem. Chem. Phys., 2010,12, 902-908

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    Influence of endohedral water on diameter sorting of single-walled carbon nanotubes by density gradient centrifugation

    A. Quintillá, F. Hennrich, S. Lebedkin, M. M. Kappes and W. Wenzel, Phys. Chem. Chem. Phys., 2010, 12, 902
    DOI: 10.1039/B912847F

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