Loop formation and stability of self-avoiding polymer chains |
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Authors: | Wancheng Yu Kaifu Luo |
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Institution: | 1.CAS Key Laboratory of Soft Matter Chemistry, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Polymer Science and Engineering,University of Science and Technology of China,Hefei,China |
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Abstract: | Using 3-dimensional Langevin dynamics simulations, we investigated the dynamics of loop formation of chains with excluded volume interactions, and the stability of the formed loop. The mean looping time τ l scales with chain length N and corresponding scaling exponent α increases linearly with the capture radius scaled by the Kuhn length a/l due to the effect of finite chain length. We also showed that the probability density function of the looping time is well fitted by a single exponential. Finally, we found that the mean unlooping time τ u hardly depends on chain length N for a given a/l and that the stability of a formed loop is enhanced with increasing a/l. |
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