Adsorption of cationic polyions onto a hydrophobic surface in the presence of Hofmeister salts

被引：4
|
作者：
dos Santos, Alexandre P. [1 ]
Levin, Yan [2 ]
机构：
[1] Univ Fed Santa Catarina, Dept Fis, BR-88040900 Florianopolis, SC, Brazil
[2] Univ Fed Rio Grande do Sul, Inst Fis, BR-91501970 Porto Alegre, RS, Brazil
来源：
SOFT MATTER | 2013年 / 9卷 / 44期
关键词：
AQUEOUS-ELECTROLYTE SOLUTIONS; MOLECULAR-DYNAMICS; THERMODYNAMIC QUANTITIES; IONS; INTERFACES; POLYELECTROLYTES; HYDRATION; TENSION; SERIES; NANOPARTICLES;
D O I：
10.1039/c3sm51057c
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：
We study, using extensive Monte Carlo simulations, the behavior of cationic polyelectrolytes near hydrophobic surfaces in solutions containing Hofmeister salts. The Hofmeister anions are divided into kosmotropes and chaotropes. Near a hydrophobic surface, the chaotropes lose their solvation sheath and become partially adsorbed to the interface, while the kosmotropes remain strongly hydrated and are repelled from the interface. If the polyelectrolyte solution contains chaotropic anions, a significant adsorption of polyions onto the surface is also observed. On the other hand, the kosmotropic anions have only a small influence on polyion adsorption. These findings can have important implications for exploring the antibacterial properties of cationic polyelectrolytes.
引用
收藏
页码：10545 / 10549
页数：5
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