2-D and 3-D Interactions in Random Sequential Adsorption of Charged Particles

Influence of Polydispersity on Adsorption of Nanoparticles

“…Our measured coverages are substantially higher than the model predictions for low κa, as is often the case in the adsorption of polystyrene particles (4). RSA models taking into account both particle-particle and particle-surface interactions can be used to get better fits to the experimental data (11). However, the understanding of the adsorption behavior at low ionic strengths is still quite incomplete.…”

“…Examples of complicating factors are particle-particle and particle-surface electrostatic interactions, hydrodynamic interactions, diffusion, size polydispersity, and multilayer formation. The RSA concept can be extended to account for all of these experimental features (6,(9)(10)(11).…”

Effect of Gravity on Colloidal Deposition Studied by Atomic Force Microscopy

“…The long-time adsorption behavior of colloidal latex particles onto mica (1, 2) and polyelectrolyte-coated glass (3) has been shown to display characteristics of the random sequential adsorption (RSA) model, which assumes irreversible adsorption (4). However, the original RSA model neglects all but steric interactions, and experimental data for charged particles are better described by several extensions of the RSA model that have been developed to include energetic interactions between the particles and the surface and interactions between adsorbates (5,6). Interactions between adsorbed particles become important, especially at high coverages, with the magnitudes of the various interactions depending on many factors, such as surface charge, solution ionic strength and pH, particle concentration, and particle size.…”

Coupled Influence of Colloidal and Hydrodynamic Interactions on the RSA Dynamic Blocking Function for Particle Deposition onto Packed Spherical Collectors

“…One of the most prominent developments is the (RSA) model, which was originally proposed to account for the dynamic blocking effects for hard disks (or hard spheres) on a planar surface (21,25,26). Several modifications of the basic RSA model have been proposed that account for the additional influence of long-range electrostatic interactions (9,24,27) and the hydrodynamic interactions (7,13,17). However, most of these theoretical approaches consider the collector surfaces to be planar and typically apply to well-defined experimental systems like stagnation point flow cells (8,13).…”

“…It is indeed considerably difficult to develop a rigorous theory for the deposition dynamics based on the actual geometry of a packed medium. For such instances, one is forced to either assume a planar collector geometry in the theoretical treatment (6,12) or resort to computer simulations to elucidate the pertinent blocking behavior (7,13,27).…”