Conformation-dependent translocation of a star polymer through a
nanochannel |
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| Authors: | Zhu Liu Jiannan Liu Mengying Xiao Rong Wang Yeng-Long Chen |
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| Institution: | 1.Key Laboratory of High Performance Polymer Materials and Technology of Ministry of Education, Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, China;2.Institute of Physics, Academia Sinica, Taipei 11529, Taiwan |
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| Abstract: | The translocation process of star polymers through a nanochannel is investigated by dissipative
particle dynamics simulations. The translocation process is strongly influenced by the star arm
arrangement as the polymer enters the channel, and a scaling relation between the translocation time τ and the total number of beads Ntot is
obtained. Qualitative agreements are found with predictions of the nucleation and growth model for
linear block co-polymer translocation. In the intermediate stage where the center of the star
polymer is at the channel entrance, the translocation time is found to have power law-dependence on
the number of arms outside the channel and very weakly dependent on the number of arms in the
channel. Increasing the total number of star arms also increases the star translocation time. |
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