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Effects of alkyl amide solvents on the dispersion of single-wall carbon nanotubes

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dc.contributor.author Landi, Brian en_US
dc.contributor.author Ruf, Herbert en_US
dc.contributor.author Worman, James en_US
dc.contributor.author Raffaelle, Ryne en_US
dc.date.accessioned 2006-07-19T20:03:36Z en_US
dc.date.available 2006-07-19T20:03:36Z en_US
dc.date.issued 2004-11-04 en_US
dc.identifier.citation Journal of Physical Chemistry B 108N44 (2004) 17089-17095 en_US
dc.identifier.issn 1520-5207 en_US
dc.identifier.uri http://hdl.handle.net/1850/2244 en_US
dc.description.abstract Stable dispersions of both as-produced (raw soot) and purified laser-generated single-wall carbon nanotubes (SWNTs) have been demonstrated with several alkyl amide solvents. Optical absorption analysis over a range of concentrations has been utilized to estimate the dispersion limits for as-produced SWNTs in N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMA), N,N-diethylacetamide (DEA), and N,N-dimethylpropanamide (DMP). In addition, extinction coefficients have been calculated using Beer's law for each solvent at energies of 1.27 and 1.77 eV, corresponding to the electronic transitions of semiconducting and metallic SWNTs, respectively. The results imply that high polarizability and optimal geometries (appropriate bond lengths and bond angles) may account for the favorable interaction between SWNTs and the alkyl amide solvents. The successful dispersion of purified SWNTs in DMA has enabled extinction coefficients of 43.4 and 39.0 mL·mg-1·cm-1 to be calculated at the selected energies, respectively. The magnitude of the dispersion limit and extinction coefficient values has been shown to be strongly dependent on the SWNT sample purity. These findings offer the potential for solution-phase analysis of SWNTs directed at purity assessment and electrophoretic separations in a simple organic solvent. en_US
dc.description.sponsorship Financial support for this project was from the National Science Foundation (Grant No. ECS-0233776), the Department of Energy (Grant No. DEFG02-02ER63393), NASA (Grant Nos. NAG3-2828 and NCC3-956), and the Rochester Institute of Technology’s First In Class Initiative. en_US
dc.format.extent 31371 bytes en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.publisher The American Chemical Society: Journal of Physical Chemistry B en_US
dc.title Effects of alkyl amide solvents on the dispersion of single-wall carbon nanotubes en_US
dc.type Abstract en_US
dc.subject.keyword Carbon nanotubes en_US
dc.subject.keyword Dispersion en_US
dc.subject.keyword SWNTs en_US
dc.identifier.url http://dx.doi.org/10.1021/jp047521j

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