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Comparative Measures of Single Wall Carbon Nanotube Dispersion



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


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.
Journal of Physical Chemistry


composite, dispersion, nanotube, neutron scattering, polyarylic acid, polymer


Fagan, J. , Landi, B. , Mandelbaum, I. , Bajpai, V. , Bauer, B. , Migler, K. , Simpson, J. , Hight, A. , Raffaelle, R. and Hobbie, E. (2006), Comparative Measures of Single Wall Carbon Nanotube Dispersion, Journal of Physical Chemistry, [online], (Accessed June 18, 2024)


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Created September 14, 2006, Updated February 19, 2017