| Single long-polymer translocation through a long pore |
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| 作者姓名： | 丁克俭 蔡冬青 詹福如 吴李君 吴跃进 余增亮 |
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| 作者单位： | The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China;The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China;The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China;The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China;The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China;The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China |
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| 基金项目： | Project supported by the Knowledge Innovation Program of the Chinese Academy of Sciences (Grant No
KSCX2-SW-324), and the National Science Fund for Distinguished Young Scholars, China (Grant No 10225526). |
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| 摘 要： | This paper theoretically studies the free energy and conformational entropy of a long polymer threading a long nanopore （no/N ≥0.1） on external electric field. The polymer expanded model is built in this paper, that is, a single long polymer chain with N monomers （each of size a） threading a pore with no monomers can be regarded as polymer with N ＋ no monomers translocating a 2-dimension hole embedded in membrane. A theoretical approach is presented which explicitly takes into account the nucleation theory. Our calculations imply that, the structure of polymer changes more acutely than other situation, while its leading monomer reaches the second vacuum and its end monomer escapes the first vacuum. And it is also shown that the length scale of polymer and pore play a very important role for polymer translocation dynamics. The present model predicts that the translocation time depends on the chemical potential gradient and the property of the solvent on sides of pore to some extent.
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| 关 键 词： | 聚合膨胀 成核理论 熵 原子物理学 |
| 收稿时间： | 2005-11-07 |
| 修稿时间： | 2005-11-072005-12-25 |
Single long-polymer translocation through a long pore |
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| Ding Ke-Jian,Cai Dong-Qing,Zhan Fu-Ru,Wu Li-Jun,Wu Yue-Jin and Yu Zeng-Liang.Single long-polymer translocation through a long pore[J].Chinese Physics B,2006,15(5):940-946. |
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| Authors: | Ding Ke-Jian Cai Dong-Qing Zhan Fu-Ru Wu Li-Jun Wu Yue-Jin and Yu Zeng-Liang |
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| Institution: | The Key Laboratory of Ion-Beam Bioengineering, Institute of Plasma Physics,Chinese Academy of Sciences, Hefei 230031, China |
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| Abstract: | This paper theoretically studies the free energy and conformational entropy of a long
polymer threading a long nanopore (n0/N \ge 0.1) on external electric
field. The polymer expanded model is built in this paper, that is, a
single long polymer chain with N monomers (each of size a) threading
a pore
with n0 monomers can be regarded as polymer with N+n_{0} monomers
translocating a 2-dimension hole embedded in membrane. A theoretical
approach is presented which explicitly takes into account the nucleation
theory. Our calculations imply that, the structure of polymer changes
more acutely than other situation, while its leading monomer reaches the second
vacuum and its end monomer escapes the first vacuum. And it is also shown
that the length scale of polymer and pore play a very important role for
polymer translocation dynamics. The present model predicts that the
translocation time depends on the chemical potential gradient and the
property of the solvent on sides of pore to some extent. |
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| Keywords: | polymer expansion nucleation theory conformational
entropy translocation time |
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