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Publication Citation: Comparative Measures of Single Wall Carbon Nanotube Dispersion

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Author(s): Jeffrey A. Fagan; Brian Landi; Idan Mandelbaum; Vardhan Bajpai; Barry J. Bauer; Kalman D. Migler; Jeffrey R. Simpson; Angela R. Hight Walker; Ryan Raffaelle; Erik K. Hobbie;
Title: Comparative Measures of Single Wall Carbon Nanotube Dispersion
Published: September 14, 2006
Abstract: Model polymer composites of DNA wrapped single-wall carbon nanotubes (SWNTs) dispersed in polyacrylic acid are used for a systematic comparison of the different metrologies currently used to evaluate SWNT dispersion. Application of a pH-controlled variation in dispersion quality has allowed for the evaluation of each method in terms of its sensitivity to SWNT bundling and clustering in the limit of nanodispersion. Small-angle neutron scattering (SANS) was found to provide the most direct measure of dispersion, followed by near-infrared fluorescence spectroscopy, optical absorption spectroscopy, and resonant Raman scattering. Our results represent the first systematic comparison of currently accepted metrics for assessing SWNT dispersion and provide a calibration of the various techniques.
Citation: Journal of Physical Chemistry
Volume: 110
Pages: pp. 23801 - 23805
Keywords: composite;dispersion;nanotube;neutron scattering;polyarylic acid;polymer
Research Areas: Carbon Nanotubes, Neutron Research, Nanocomposites, Nanomaterials
PDF version: PDF Document Click here to retrieve PDF version of paper (371KB)