Dynamics of collapse of flexible polyampholytes
Dynamics of collapse of flexible polyampholytes
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DOI：
10.1063/1.1312267
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发表时间：
2000-10-01
影响因子：
4.4
通讯作者：
Thirumalai, D
中科院分区：
文献类型：
--
作者：
Lee, N;Thirumalai, D
利用Langevin方程建立了柔性两性聚电解质（PAs）塌缩动力学理论。亚稳态珍珠项链结构在与N-4/5（N是单体的数量）成比例的时间尺度上形成。在崩溃的后期阶段，珍珠与最大的珍珠合并，以牺牲较小的珍珠为代价（Lifshitz-Slyozov机制）。该过程的时间尺度为τ（科尔），类似于N。强电荷聚电解质（PE）的反离子介导的崩溃遵循类似的途径，以球状状态。模拟支持建议的崩溃机制PA和PE。(C)2000年美国物理学会。[S0021-9606（00）52237-5]。
We provide a theory for the dynamics of collapse of flexible polyampholytes (PAs) using Langevin equation. Metastable pearl-necklace structures form in a time scale proportional to N-4/5 (N is the number of monomers). In the late stage of collapse the pearls merge with the largest one growing at the expense of smaller ones (Lifshitz-Slyozov mechanism). The time scale for this process is tau(coll)similar to N. Counterion-mediated collapse of strongly charged polyelectrolytes (PEs) follow a similar route to the globular state. Simulations support the proposed collapse mechanism for PAs and PEs. (C) 2000 American Institute of Physics. [S0021-9606(00)52237-5].