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American Chemical Society, Macromolecules, 11(40), p. 4043-4047, 2007

DOI: 10.1021/ma062003n

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Simple Length Determination of Single-Walled Carbon Nanotubes by Viscosity Measurements in Dilute Suspensions

Journal article published in 2007 by A. Nicholas G. Parra Vasquez, Ingrid Stepanek, Virginia A. Davis, Valerie C. Moore, Erik H. Haroz, Jonah Shaver, Robert H. Hauge, Richard E. Smalley, Matteo Pasquali ORCID
This paper is available in a repository.
This paper is available in a repository.

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Abstract

We describe a fast, reproducible method to accurately measure the length of single-walled carbon nanotubes (SWNTs). The method is based on measuring the viscosity of a macroscopic sample of dilute suspended SWNTs. The average length is determined from the difference between the zero-shear viscosity of the suspension and that of the solvent. Using the relationship between viscosity and length, the average length of HiPco SWNTs is found to range from 400 to 700 nm, in agreement with atomic force microscopy (AFM) measurements. Compared to AFM, length determination by viscosity is faster and appears more reproducible.