FAKHRI, Nikta; MACKINTOSH, F.C.; LOUNIS, Brahim; COGNET, Laurent; PASQUALI, Matteo

doi:10.1126/science.1197321

Métadonnées

Licence d’utilisation du document

FAKHRI, Nikta
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry

MACKINTOSH, F.C.
Department of Physics and Astronomy [Amsterdam]

LOUNIS, Brahim
Centre de physique moléculaire optique et hertzienne [CPMOH]

Langue

Article de revue

Ce document a été publié dans

Science. 2010-12-24, vol. 330, p. 1804-1807

American Association for the Advancement of Science (AAAS)

Résumé en anglais

The thermal motion of stiff filaments in a crowded environment is highly constrained and anisotropic; it underlies the behavior of such disparate systems as polymer materials, nanocomposites, and the cell cytoskeleton. Despite decades of theoretical study, the fundamental dynamics of such systems remains a mystery. Using near-infrared video microscopy, we studied the thermal diffusion of individual single-walled carbon nanotubes (SWNTs) confined in porous agarose networks. We found that even a small bending flexibility of SWNTs strongly enhances their motion: The rotational diffusion constant is proportional to the filament-bending compliance and is independent of the network pore size. The interplay between crowding and thermal bending implies that the notion of a filament's stiffness depends on its confinement. Moreover, the mobility of SWNTs and other inclusions can be controlled by tailoring their stiffness.< Réduire

DOI

http://dx.doi.org/10.1126/science.1197321

Projet Européen

Nano-Scale Organization Dynamics and Functions of Synapses: from single molecule tracking to the physiopathology of excitatory synaptic transmission

Origine

Importé de hal

Unités de recherche

Laboratoire Ondes et Matière d'Aquitaine (LOMA) - UMR 5798