| Brownian motion of stiff filaments in a crowded environment. | |
| | |
MedLine Citation:
|
PMID: 21205665 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
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. |
| | |
Authors:
|
Nikta Fakhri; Frederick C MacKintosh; Brahim Lounis; Laurent Cognet; Matteo Pasquali |
Related Documents
:
|
10851115 - Catarrhine photopigments are optimized for detecting targets against a foliage background. 18079835 - Optical correlation with totally incoherent light. 19740895 - A foraging advantage for dichromatic marmosets (callithrix geoffroyi) at low light inte... 4069945 - Perception of motion in equiluminous kinematograms. 14667945 - Medio-lateral motion of the center of mass during obstacle crossing distinguishes elder... 7085985 - The minimum detectable duration of auditory signals for normal and hearing-impaired lis... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Science (New York, N.Y.) Volume: 330 ISSN: 1095-9203 ISO Abbreviation: Science Publication Date: 2010 Dec |
Date Detail:
|
Created Date: 2011-01-05 Completed Date: 2011-01-20 Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 0404511 Medline TA: Science Country: United States |
Other Details:
|
Languages: eng Pagination: 1804-7 Citation Subset: IM |
Affiliation:
|
Department of Chemical and Biomolecular Engineering, Smalley Institute for Nanoscale Science and Technology, Rice University, Houston, TX 77005, USA. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Diffusion Microscopy, Video Nanotubes, Carbon / chemistry* Physicochemical Phenomena Polymers / chemistry Sepharose Temperature |
| Chemical | |
Reg. No./Substance:
|
0/Nanotubes, Carbon; 0/Polymers; 9012-36-6/Sepharose |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Spin Hall effect transistor.
Next Document: Dynamics of magnetic domain walls under their own inertia.