Field-driven polyelectrolyte-polymer collisions in nanochannels

被引:0
|
作者
Wang, H. Y. [1 ]
Slater, G. W. [1 ]
机构
[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada
来源
JOURNAL OF CHEMICAL PHYSICS | 2024年 / 160卷 / 19期
基金
加拿大自然科学与工程研究理事会;
关键词
CAPILLARY-ELECTROPHORESIS; DYNAMICS SIMULATIONS; SOFT MATTER; DNA; SEPARATION; HYDRODYNAMICS; MOLECULE;
D O I
10.1063/5.0195302
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Even though dilute (unentangled) polymer solutions cannot act as gel-like sieving media, it has been shown that they can be used to separate DNA molecules in capillary electrophoresis. The separation then comes from sporadic, independent DNA-polymer collisions. We study polymer-polymer collisions in nanochannels (i.e., channels that are smaller than the normal size of the polymers), a situation where a polyelectrolyte is forced to migrate "through" isolated uncharged molecules during electrophoresis. We use Langevin dynamics simulations to explore the nature of these collisions and their effect on the net motion of the two polymer chains. We identify several types of collisions, including some that are unique to nanochannels. When the uncharged polymer is much larger than the polyelectrolyte, the system is reminiscent of gel electrophoresis, and we propose a modified empirical reptation model to explain the data, with an orientation factor that depends on the tube diameter. We also observe that the duration of a collision is a non-monotonic function of the polymer size ratio when the two chains are of comparable size, a surprising resonance-like phenomenon, which, combined with the asymmetric nature of molecular conformations during collision, suggests possible ratchet-like mechanisms that could be used to sort polyelectrolytes in nanodevices.
引用
收藏
页数:13
相关论文
共 50 条
  • [21] Random field effects in field-driven quantum critical points
    Anfuso, F.
    Rosch, A.
    EUROPEAN PHYSICAL JOURNAL B, 2009, 69 (04): : 465 - 471
  • [22] Spin pumping by a field-driven domain wall
    Duine, R. A.
    PHYSICAL REVIEW B, 2008, 77 (01)
  • [23] Formation and field-driven dynamics of nematic spheroids
    Fu, Fred
    Abukhdeir, Nasser Mohieddin
    SOFT MATTER, 2017, 13 (28) : 4890 - 4902
  • [24] Electric field-driven folding of single molecules
    Saisai Yuan
    Yu Zhou
    Tengyang Gao
    Lichuan Chen
    Wei Xu
    Ping Duan
    Juejun Wang
    Zhichao Pan
    Chun Tang
    Yang Yang
    Ruiyun Huang
    Zongyuan Xiao
    Wenjing Hong
    Chinese Chemical Letters, 2024, 35 (01) : 525 - 530
  • [25] Emergent Field-Driven Robot Swarm States
    Wang, Gao
    Phan, Trung, V
    Li, Shengkai
    Wombacher, Michael
    Qu, Junle
    Peng, Yan
    Chen, Guo
    Goldman, Daniel, I
    Levin, Simon A.
    Austin, Robert H.
    Liu, Liyu
    PHYSICAL REVIEW LETTERS, 2021, 126 (10)
  • [26] Random field effects in field-driven quantum critical points
    F. Anfuso
    A. Rosch
    The European Physical Journal B, 2009, 69 : 465 - 471
  • [27] Field-driven collapsing dynamics of skyrmions in magnetic multilayers
    Tomasello, R.
    Wang, Z.
    Raimondo, E.
    Je, S.
    Im, M.
    Carpentieri, M.
    Jiang, W.
    Finocchio, G.
    PHYSICAL REVIEW B, 2023, 107 (18)
  • [28] New Bending Algorithm for Field-Driven Molecular Dynamics
    Dao-Long Chen
    Tei-Chen Chen
    Yi-Shao Lai
    Nanoscale Research Letters, 5
  • [29] External physical field-driven nanocatalytic cancer therapy
    Wu, Qingyuan
    Zhang, Haoyuan
    Liu, Huiyu
    BMEMAT, 2023, 1 (01):
  • [30] Field-driven oscillation and rotation of a multiskyrmion cluster in a nanodisk
    Liu, Yan
    Yan, Huan
    Jia, Min
    Du, Haifeng
    Du, An
    Zang, Jiadong
    PHYSICAL REVIEW B, 2017, 95 (13)