Kamat, Prashant V. ; George Thomas, K. ; Barazzouk, Said ; Girishkumar, G. ; Vinodgopal, K. ; Meisel, Dan (2004) Self-assembled linear bundles of single wall carbon nanotubes and their alignment and deposition as a film in a dc field Journal of the American Chemical Society, 126 (34). pp. 10757-10762. ISSN 0002-7863
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Official URL: http://pubs.acs.org/doi/abs/10.1021/ja0479888
Related URL: http://dx.doi.org/10.1021/ja0479888
Abstract
A one-step process of solubilization of single wall carbon nanotubes (SWCNT) in an organic solvent has enabled us to polarize them asymmetrically in a dc electric field. Quaternary ammonium ion-capped SWCNTs readily suspend in organic solvents; under the influence of a dc electric field, they assemble as stretched bundles anchored on the positive electrode. At low dc applied field (~40 V), all of the SWCNTs from the suspension are deposited on the electrode, thus providing a simple methodology to design robust SWCNT films. At higher applied voltages (>100 V), the SWCNT bundles stretch out into the solution and orient themselves perpendicular to the electrode surface. The alignment of these bundles is responsive to the ON-OFF cycles of the applied electric field. The possibility of modulating the alignment of SWCNT in an electric field opens new ways to achieve electrical contacts in nano- to micro-devices.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Chemical Society. |
ID Code: | 51400 |
Deposited On: | 28 Jul 2011 11:45 |
Last Modified: | 28 Jul 2011 11:45 |
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