KINETICS OF IRREVERSIBLE ADSORPTION OF INTERACTING SPHEROIDAL PARTICLES

The kinetics of the localized, irreversible adsorption of interacting spheroidal particles on homogeneous interfaces was analyzed theoretica lly. By applying the random sequential adsorption (RSA) approach, nume rical MC simulations were performed in the case of the short ranged Yu kawa-type potential of interaction. Both the surface-blocking paramete r (available surface function) and adsorption kinetics were determined for various particle elongations and for a broad range of the xa para meter characterizing the range of the interaction potential. It was de monstrated that the ''exact'' numerical results can well be described for not too high surface concentrations by the approximate analytical equations derived using the equivalent hard-particle concept. On the o ther hand, for higher surface concentrations close to jamming, adsorpt ion kinetics of soft particles can well be approximated by the power-l aw dependence analogous to hard particles. The theoretical analysis re vealed that adsorption kinetics of colloid particles of spheroidal sha pe is considerably diminished by the lateral electrostatic interaction s.