Citation: Zhou Li-qin, Yu Wan-cheng, Chen Yu-hao, Luo Kai-fu. Ejection Dynamics of Semiflexible Polymers out of a Nanochannel[J]. Chinese Journal of Polymer Science, ;2016, 34(10): 1196-1207. doi: 10.1007/s10118-016-1842-0 shu

Ejection Dynamics of Semiflexible Polymers out of a Nanochannel

Chinese Academy of Sciences Key Laboratory of Soft Matter Chemistry, and Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China

Corresponding author: Yu Wan-cheng, ywcheng@ustc.edu.cn Chen Yu-hao, cyh204@mail.ustc.edu.cn
Received Date: 29 March 2016
Revised Date: 14 April 2016
Accepted Date: 15 April 2016

Fund Project: the National Natural Science Foundation of China 21225421 and 21474099the Fundamental Research Funds for the Central Universities WK2060200020the 973 Program of Ministry of Science and Technology of China (MOST) 2014CB845605the China Postdoctoral Science Foundation 2015M581998

Using theoretical analysis and three-dimensional Langevin dynamics simulations, we investigate the influence of chain rigidity on the ejection dynamics of polymers from a nanochannel. We find that there exist two distinct dynamical regimes divided by a critical chain length for both flexible and semiflexible chains. At the short chain regime, semiflexible chains eject faster than flexible chains of the same chain length due to the longer occupying length. In contrast, at the long chain regime, semiflexible chains eject slower than flexible ones as the effective entropic driving force decreases. Based on these results, we propose that the nanochannels could be used to separate flexible and semiflexible chains effectively
- Ejection dynamics,
- Semiflexible polymers,
- Langevin dynamics simulations,
- Chain separation
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