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Crystals 2014, 4(4), 450-465; doi:10.3390/cryst4040450

Dialytic Separation of Bundled, Functionalized Carbon Nanotubes from Carbonaceous Impurities

1
Molecular Pharmacology and Chemistry Program, Memorial Sloan-Kettering Cancer Center, 1275 York Avenue, New York, NY 10065, USA
2
Weill Cornell Medical College, 525 E 68th Street, New York, NY 10065, USA
3
Tri-Institutional MD-PhD Program, 1230 York Avenue, 320, New York, NY 10065, USA
4
School of Engineering, Stanford University, Stanford, CA 94305, USA
5
Departments of Radiology and Medicine, Memorial Sloan-Kettering Cancer Center, 408 East 69th, ZRC 1941, New York, NY 10021, USA
*
Author to whom correspondence should be addressed.
Received: 2 July 2014 / Revised: 31 October 2014 / Accepted: 7 November 2014 / Published: 20 November 2014
(This article belongs to the Special Issue Carbon Nanostructures)
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Abstract

Separating functionalized single-wall carbon nanotubes (SWCNTs) from functionalized amorphous carbon is challenging, due to their polydispersity and similar physicochemical properties. We describe a single-step, dialytic separation method that takes advantage of the ability of heavily functionalized SWCNTs to bundle in a polar environment while maintaining their solubility. Experiments on functionalized SWCNTs were compared with functionalized, C60 fullerenes (buckyballs) to probe the general applicability of the method and further characterize the bundling process. This approach may simultaneously be used to purify a functionalization reaction mixture of unreacted small molecules and of residual solvents, such as dimethylformamide. View Full-Text
Keywords: nanotube; C60; dialysis; amorphous carbon; graphitic carbon; purification; functionalization; bundling nanotube; C60; dialysis; amorphous carbon; graphitic carbon; purification; functionalization; bundling
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Mulvey, J.J.; Feinberg, E.N.; McDevitt, M.R.; Scheinberg, D.A. Dialytic Separation of Bundled, Functionalized Carbon Nanotubes from Carbonaceous Impurities. Crystals 2014, 4, 450-465.

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