Brownian Motion of Stiff Filaments in a Crowded Environment
FAKHRI, Nikta
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
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Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
FAKHRI, Nikta
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
PASQUALI, Matteo
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
< Reduce
Department of Chemical and Biomolecular Engineering
The Smalley Institute for Nanoscale Science and Technology
Department of Chemistry
Language
en
Article de revue
This item was published in
Science. 2010-12-24, vol. 330, p. 1804-1807
American Association for the Advancement of Science (AAAS)
English Abstract
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. ...Read more >
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.Read less <
European Project
Nano-Scale Organization Dynamics and Functions of Synapses: from single molecule tracking to the physiopathology of excitatory synaptic transmission
Origin
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