Entropic force on granular chains self-extracting from one-dimensional confinement

The entropic forces on the self-retracting granular chains, which are confined in channels with different widths, are determined. The time dependence of the length of chain remaining in the channel Lin(t) is measured. The entropic force is treated as the only parameter in fitting the solution of the...

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Bibliographic Details
Published in:The Journal of chemical physics 2014-01, Vol.140 (2), p.024912-024912
Main Authors: Jeng, Pei-Ren, Chen, KuanHua, Hwang, Gwo-jen, Cho, Ethan Y, Lien, Chenhsin, To, Kiwing, Chou, Y C
Format: Article
Language:English
Subjects:
Chains
Confinement
Confining
DNA - chemistry
Entropy
Equations of motion
Motion
Nonlinear equations
Solutions
Time dependence
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Summary:The entropic forces on the self-retracting granular chains, which are confined in channels with different widths, are determined. The time dependence of the length of chain remaining in the channel Lin(t) is measured. The entropic force is treated as the only parameter in fitting the solution of the nonlinear equation of motion of Lin(t) to the experimental data. The dependence of the entropic force on the width of the confining channel can be expressed as a power-law with an exponent of 1.3, which is consistent with the previous theoretical predictions for the entropy loss due to confinement.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.4861559