标题： 离子介导的中性板之间的相互作用：弱 disorder 和强 disorder 效应 显示英文标题

标题： Ion-mediated interactions between net-neutral slabs: Weak and strong disorder effects

摘要： 我们研究了在包含混合移动单价和多价离子的不对称库仑流体中，两个随机带电但总体中性的平面介电板之间的有效相互作用。与范德华和图像诱导的离子耗尽相互作用的标准图景相比，板的相对边界表面上的电荷无序的存在导致它们相互作用的方式出现显著的定性变化。虽然后者预测严格中性板之间纯粹的吸引力，但我们表明，表面电荷无序、图像耗尽、德拜（或盐）屏蔽以及特别是它们与多价离子的耦合的综合效应，使得总体中性板之间的有效相互作用表现出更复杂的行为。无序效应的变化很大，取决于无序强度的适当量化，当表面电荷弱无序（小无序方差）时，会导致具有排斥和吸引分支的有效相互作用非单调变化；而当表面强无序（大无序方差）时，则会导致主导的吸引力，其范围和大小都比范德华和图像诱导的离子耗尽相互作用所预测的更大。 显示英文摘要

摘要： We investigate the effective interaction between two randomly charged but otherwise net-neutral, planar dielectric slabs immersed in an asymmetric Coulomb fluid containing a mixture of mobile monovalent and multivalent ions. The presence of charge disorder on the apposed bounding surfaces of the slabs leads to substantial qualitative changes in the way they interact, as compared with the standard picture provided by the van der Waals and image-induced, ion-depletion interactions. While, the latter predict purely attractive interactions between strictly neutral slabs, we show that the combined effects from surface charge disorder, image depletion, Debye (or salt) screening and also, in particular, their coupling with multivalent ions, give rise to a more diverse behavior for the effective interaction between net-neutral slabs. Disorder effects show large variation depending on the properly quantified strength of disorder, leading either to non-monotonic effective interaction with both repulsive and attractive branches when the surface charges are weakly disordered (small disorder variance) or to a dominating attractive interaction that is larger both in its range and magnitude than what is predicted from the van der Waals and image-induced, ion-depletion interactions, when the surfaces are strongly disordered (large disorder variance).