Abstract
Recent studies indicate that active polymers often show curious conformational and dynamical properties. Specially, rigid polymers with self-propelled tangential forces can move directionally and even push a cargo. Motivated by this, the translocation of an active bead-spring polymer through a narrow pore is studied simulationly in this work. Each bead of the polymer is propelled by a tangential active force (fa) along the contour of the polymer. Simulation results show that the active polymer translocates through the pore in a railway-motion manner. The translocation velocity ν of the polymer is determined only by fa, resulting that the translocation time (τ) as a function of the polymer length (N) and the active force fa can be expressed as τ∝Nf −1a , which is independent of the rigidity of the polymer. Our results indicate that the translocation dynamics of active polymers is quite different from that of passive polymers.
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This work was financially supported by the Zhejiang Provincial Natural Science Foundation of China (No. LY20A040004) and the National Natural Science Foundation of China (Nos. 11604232 and 11974305).
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Wang, C., Hu, HX., Zhou, YL. et al. Translocation of a Self-propelled Polymer through a Narrow Pore. Chin J Polym Sci 40, 1670–1678 (2022). https://doi.org/10.1007/s10118-022-2768-3
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DOI: https://doi.org/10.1007/s10118-022-2768-3