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

被引：37
|
作者：
Tang, J [1 ]
Marcus, RA [1 ]
机构：
[1] CALTECH, Arthur Amos Noyes Lab Chem Phys, Pasadena, CA 91125 USA
来源：
PHYSICAL REVIEW E | 2006年 / 73卷 / 02期
关键词：
D O I：
10.1103/PhysRevE.73.022102
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
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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页数：4
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