FAKHRI, Nikta; TSYBOULSKI, Dmitri A.; COGNET, Laurent; WEISMAN, R. Bruce; PASQUALI, Matteo

doi:10.1073/pnas.0904148106

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FAKHRI, Nikta
Department of Chemical and Biomolecular Engineering
Center for Biological and Environmental Nanotechnology

TSYBOULSKI, Dmitri A.
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry

COGNET, Laurent
Department of Chemistry
Centre de physique moléculaire optique et hertzienne [CPMOH]

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Proceedings of the National Academy of Sciences of the United States of America. 2009-08-25, vol. 106, n° 34, p. 14219-223

National Academy of Sciences

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By relating nanotechnology to soft condensed matter, understanding the mechanics and dynamics of single-walled carbon nanotubes (SWCNTs) in fluids is crucial for both fundamental and applied science. Here, we study the Brownian bending dynamics of individual chirality-assigned SWCNTs in water by fluorescence microscopy. The bending stiffness scales as the cube of the nanotube diameter and the shape relaxation times agree with the semiflexible chain model. This suggests that SWCNTs may be the archetypal semiflexible filaments, highly suited to act as nanoprobes in complex fluids or biological systems.< Réduire

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actin

microrheology

semiflexible filaments and polymers

stochastic dynamics

nanomechanics

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Diameter-dependent bending dynamics of single-walled carbon nanotubes in liquids

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