Ion multivalence and like-charge polyelectrolyte attraction
Ion multivalence and like-charge polyelectrolyte attraction
复制标题
DOI：
10.1103/physrevlett.91.028301
复制
发表时间：
2003-07-11
影响因子：
8.6
通讯作者：
Wong, GCL
中科院分区：
文献类型：
--
作者：
Butler, JC;Angelini, T;Wong, GCL
经验表明，多价离子在带同种电荷的聚电解质之间产生吸引力，不同体系具有不同的价要求。一个离子要多价才能凝结给定的聚电解质？利用可调节电荷的M13病毒棒和一系列不同大小的人工同源“哑铃”二价离子，我们构建了一个多价离子-多电解质相图，并基于离子价、离子大小和Gouy-Chapman长度找到了一个实验驱动的同种电荷吸引的通用标准。
It is known empirically that multivalent ions generate attractions between like-charged polyelectrolytes, with different valence requirements for different systems. How multivalent must an ion be before it can condense a given polyelectrolyte? Using charge-tunable M13 virus rods and a family of artificial homologous "dumbbell" divalent ions of different sizes, we have constructed a multivalent ion-polyelectrolyte phase diagram, and find an experimentally motivated general criterion for like-charged attraction based on the ion valence, ion size, and the Gouy-Chapman length.