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Issue 21, 2010
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Order–disorder transition induced by surfactant micelles in single-walled carbon nanotubes dispersions

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Abstract

The observation of spontaneously formed microns-long islands of orientationally ordered SWNT in isotropic dispersions of spherical surfactant micelles is reported. The micelles co-exist with surfactant-coated individual SWNT of like charge. Inter-tube distances of 25 to 16 nanometres and an unexpected first order transition into a random phase induced by an increased ionic strength cannot be explained by classical depletion interactions or electrostatic repulsion. We suggest that coupling between the nanostructures and the assembled molecules modifies the effective interactions in an unexpected way. As the nanometrically thin SWNT share common features with rigid polymers, rod-like particle suspensions, and biological polymers such as microtubules and actin in crowded cellular environments, the observed phenomenon is believed to be general and expected in other systems.

Graphical abstract: Order–disorder transition induced by surfactant micelles in single-walled carbon nanotubes dispersions

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Article information


Submitted
21 Apr 2010
Accepted
17 Aug 2010
First published
10 Sep 2010

Soft Matter, 2010,6, 5289-5292
Article type
Communication

Order–disorder transition induced by surfactant micelles in single-walled carbon nanotubes dispersions

E. Nativ-Roth, R. J. Nap, I. Szleifer and R. Yerushalmi-Rozen, Soft Matter, 2010, 6, 5289
DOI: 10.1039/C0SM00276C

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