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Magnetic-field induced efficient alignment of carbon nanotubes in aqueous solutions
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2007 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 19, no 4, 787-791 p.Article in journal (Refereed) Published
Abstract [en]

Efficient alignment of aqueous carboxyl-functionalized multiwalled carbon nanotubes having remanent iron catalyst particles are carried out in relatively low external magnetic fields (B <= 1017 mT). The nanotubes were grown by catalytic chemical vapor deposition and then functionalized in a multistep oxidation process using nitric acid and potassium permanganate. In the field-induced ordering, the ferromagnetic property of iron nanoparticles entrapped in the inner-tubular cavity of nanotubes is exploited. Considerable dichroism of nanotube solutions (up to 3.02) is measured and deposition of aligned CNT networks from the solutions on silicon substrates is demonstrated.

Place, publisher, year, edition, pages
2007. Vol. 19, no 4, 787-791 p.
Keyword [en]
transport-properties, optical anisotropy, polymer, fibers, films, nanoparticles, architectures, orientation, composites, deposition
URN: urn:nbn:se:kth:diva-16379DOI: 10.1021/cm062196tISI: 000244161800021ScopusID: 2-s2.0-33947099474OAI: diva2:334421
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Rao, K. V.
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Engineering Material Physics
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