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Thermal fluctuations of individual semiflexible polymers in confined geometry | | Sarah Köster
; Stephan Herminghaus
; Jan Kierfeld
; Holger Stark
; Thomas Pfohl
; | | Date: |
21 Sep 2005 | | Subject: | Soft Condensed Matter | cond-mat.soft | | Abstract: | Thermal fluctuations of individual actin filaments confined in rectangular microchannels with dimensions similar to the mesh size of the cytoskeleton in eukaryotic cells were studied using fluorescence microscopy. We observed a strong dependence of the tangent correlation on both channel width and filament length. Compared to freely fluctuating filaments, long filaments confined in narrow channels exhibit an enhanced tangent correlation with a local minimum. These unique characteristics may be described by an analytical expression assuming the confining energy as a parabolic potential. We find the d^(2/3) law for the deflection length lambda, which has been theoretically predicted for circular tubes and a hard wall potential, experimentally confirmed. | | Source: | arXiv, cond-mat/0509548 | | Services: | Forum | Review | PDF | Favorites | |
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