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Chromatographic Separation of Single Wall Carbon Nanotubes

Published online by Cambridge University Press:  01 February 2011

Barry J. Bauer ,
Vardhan Bajpai ,
Jeffrey A. Fagan ,
Matthew L. Becker  and
Erik K. Hobbie
Barry J. Bauer
Affiliation:
barry.bauer@nist.gov, NIST, Polymers, 100 Bureau Drive, stop 8541, Gaithersburg, MD, 20899-8541, United States, 301-975-6849, 301-975-3928
Vardhan Bajpai
Affiliation:
vardhan.bajpai@nist.gov, NIST, Polymers, 100 Bureau Drive, stop 8541, Gaithersburg, MD, 20899-8541, United States
Jeffrey A. Fagan
Affiliation:
jeffrey.fagan@nist.gov, NIST, Polymers, 100 Bureau Drive, stop 8541, Gaithersburg, MD, 20899-8541, United States
Matthew L. Becker
Affiliation:
matthew.becker@nnist.gov, NIST, Polymers, 100 Bureau Drive, stop 8541, Gaithersburg, MD, 20899-8541, United States
Erik K. Hobbie
Affiliation:
erik.hobbie@nist.gov, NIST, Polymers, 100 Bureau Drive, stop 8541, Gaithersburg, MD, 20899-8541, United States
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Abstract

Size exclusion chromatography (SEC) has been used to separate single wall carbon nanotubes (SWNT) dispersed by chemical modification in organic solvents and by DNA in aqueous solution. The chromatographic detection includes size sensitive detectors, multi-angle light scattering (MALS) and intrinsic viscosity (IV), which can provide information on the size and shape of the SEC fractions. The dispersions were also characterized by small angle neutron scattering (SANS) and atomic force microscopy (AFM). Chemical modification was accomplished by covalent attachment of octadecyl amine to acid treated SWNT and by covalent attachment of butyl groups through free radical grafting. Both covalent attachment methods produced dispersions that contained impurities or clusters of SWNT. The DNA dispersions produced the best dispersions, being predominately single nanotubes.

Keywords

nanostructureCneutron scattering
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 922: Symposium U – Organic and Inorganic Nanotubes – From Molecular to Submicron Structures , 2006 , 0922-U09-01
Copyright
Copyright © Materials Research Society 2006

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