DLVO interaction energy between a sphere and a nano-patterned plate

DLVO interaction of colloidal particles with topographically and chemically heterogeneous surfaces

“…Similar results were found from application of the surface element integration (SEI) technique [37] to rough (rippled) surfaces [38] and smooth particles interacting with collectors patterned with hemispherical [4,5,39] and cylindrical [5] pillars and pits. In all cases, a decrease in the repulsive particle-surface interaction energy barrier was attributed to surface roughness (because part of the surface is further away from the particle), which should correspond to larger deposition rates than predicted by the DLVO theory for smooth surfaces [5].…”

“…In all cases, a decrease in the repulsive particle-surface interaction energy barrier was attributed to surface roughness (because part of the surface is further away from the particle), which should correspond to larger deposition rates than predicted by the DLVO theory for smooth surfaces [5]. The implementation of the SEI technique by Martines et al [5], in which the particle and rough surface are discretized into small but finite areal elements whose position is determined by the local topography, is similar to the grid-surface integration (GSI) approach developed by Duffadar and Davis [19] for anionic surfaces with O(10 nm) cationic patches, in which the heterogeneity was incorporated by assigning different values of the surface potential to the areal elements.…”

“…Among myriad physical and biological phenomena controlled by interactions between particles and macroscopically planar surfaces with nanoscale heterogeneity are colloidal adsorption [1][2][3][4][5], separation and filtration [6,7], coating and cleaning applications [8,9], and the receptor-mediated adhesion and rolling of neutrophils on ligand-coated surfaces [10]. Patterned surfaces with pillars have recently been shown to control frictional adhesion in some biomimetic systems [11].…”

Aggregation and deposition behavior of boron nanoparticles in porous media

“…(4). It is worth mentioning that some researchers pointed to potential limitation of the DLVO model for not explicitly considering the effects of ionic dispersion forces at high ionic strength, surface curvature, or surface heterogeneities [25][26][27][28]. However, the DLVO model is widely used and applied to explain and predict the aggregation and deposition behavior of colloids and nanoparticles in aquatic environments [2,15,19,20,[29][30][31].…”

The impact of nanoscale chemical features on micron-scale adhesion: Crossover from heterogeneity-dominated to mean-field behavior

“…Of the two types of heterogeneity, chemical variations or roughness, works targeting the impact of the latter on force, friction, and adhesion are too numerous to review. For chemically homogeneous surfaces, roughness usually shifts the distance of closest approach between two surfaces and convolutes the interaction potential between smooth surfaces [1,2]. Pure roughness may also enhance the adhesion of small particles through an increase in the contact area (for particles of appropriate size), or shielding from hydrodynamic forces [3].…”