Abstract
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.
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This work was financially supported by the National Natural Science Foundation of China (Nos. 21225421 and 21474099), the 973 Program of Ministry of Science and Technology of China (MOST) (No. 2014CB845605), the Fundamental Research Funds for the Central Universities (No. WK2060200020), and the China Postdoctoral Science Foundation (No. 2015M581998).
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Zhou, Lq., Yu, Wc., Chen, Yh. et al. Ejection dynamics of semiflexible polymers out of a nanochannel. Chin J Polym Sci 34, 1196–1207 (2016). https://doi.org/10.1007/s10118-016-1842-0
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DOI: https://doi.org/10.1007/s10118-016-1842-0