Attractions between charged colloids at water interfaces
Attractions between charged colloids at water interfaces
复制标题
水界面处带电胶体之间的吸引力
DOI：
10.1088/0953-8984/17/32/l02
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
S. Dietrich
中科院分区：
文献类型：
--
作者：
M. Oettel;A. Domínguez;S. Dietrich
分析了带电胶体在水界面处的有效势。它由一个排斥静电和吸引力的毛细管部分，渐近都显示偶极样行为。对于足够大的胶体电荷，毛细吸引力在大分离处占主导地位。如果水的德拜屏蔽长度和胶体半径具有可比的大小，则总有效势在中间分离时呈现最小值。
The effective potential between charged colloids trapped at water interfaces is analysed. It consists of a repulsive electrostatic and an attractive capillary part which asymptotically both show dipole-like behaviour. For sufficiently large colloid charges, the capillary attraction dominates at large separations. The total effective potential exhibits a minimum at intermediate separations if the Debye screening length of water and the colloid radius are of comparable size.