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Chain dynamics and power-law distance fluctuations of single-molecule systems

Tang, Jau and Marcus, R. A. (2006) Chain dynamics and power-law distance fluctuations of single-molecule systems. Physical Review E, 73 (2). Art. No. 022102. ISSN 1539-3755. doi:10.1103/PhysRevE.73.022102.

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Chain-dynamics-induced distance fluctuations between any two points in a finite chain with or without cross links are investigated. This model leads to three regimes of temporal behavior for distance autocorrelation: (i) initial flat time dependence, (ii) t–alpha power law, and (iii) long-time exponential decay. For an ideal Rouse chain with frequency-independent friction, alpha=(1/2). The span of the characteristic power-law behavior of a long chain could be reduced significantly with the presence of cross links.

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Marcus, R. A.0000-0001-6547-1469
Additional Information:©2006 The American Physical Society (Received 9 September 2005; published 23 February 2006) The authors acknowledge the support of the National Science Foundation and the Office of Naval Research. J. T. also thanks the support of the James W. Glanville Foundation at the California Institute of Technology.
Subject Keywords:polymers; macromolecules; molecular biophysics; fluctuations; friction
Issue or Number:2
Record Number:CaltechAUTHORS:TANpre06
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:3309
Deposited By: Archive Administrator
Deposited On:26 May 2006
Last Modified:08 Nov 2021 19:55

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