Effect of non-pairwise-additive interactions on bundles of rodlike polyelectrolytes
Effect of non-pairwise-additive interactions on bundles of rodlike polyelectrolytes
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DOI：
10.1103/physrevlett.81.1011
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发表时间：
1998-08-03
影响因子：
8.6
通讯作者：
Liu, AJ
中科院分区：
文献类型：
--
作者：
Ha, BY;Liu, AJ
带同种电荷的刚性聚电解质可以相互吸引，由于反离子介导的相互作用形成束。然而，由此产生的杆之间的有效相互作用并不是成对相加的。这里我们明确地计算了n棒束的自由能。我们发现成对可加性的破坏极大地影响了N棒束的稳定性，并导致自由能中的势垒随着盐浓度的增加而增加。
Like-charged rigid polyelectrolytes can attract each other due to counterion-mediated interactions to form bundles. However, the resulting effective interactions between rods are not pairwise additive. Here we calculate the free energy of an N-rod bundle explicitly. We find that the breakdown of pairwise additivity dramatically affects the stability of bundles of N rods and leads to a barrier in the free energy that grows with increasing salt concentration.