Abstract
The results of computer simulations of monolayers created from monodisperse latex particles are presented and discussed. Layers are characterized by the normalized coverage,NC (the actual coverage of the surface related to its maximum possible coverage with particles), and by the average number of neighbors,ANN, calculated as the number of particles being in contact with a given one and averaged over all the particles on the surface. Variable parameters used in simulations include: the rate of particles deposition, the probability of lateral movements, the probability of desorption of particles adsorbed on the surface, the probability of covalent immobilization of adsorbed particles, and the “on-sphere slip” parameter, OSS (characterizing the scattering of a falling particle on the particles being already attached to the surface). Morphology of monolayers is qualitatively characterized by relations betweenANN andNC. It is shown that for all monolayers formed without adhesion (and without repulsion) between the particles adsorbed on the surface the dependence ofANN vs.NC is described by a characteristic master curve (regardless of the values of probabilities of desorption and lateral movements of particles). For the monolayers created including adhesive forces between the adsorbed particles the plots ofANN vs.NC lie above the master curve, while similar plots obtained for the layers made of particles showing various types of repulsive interactions are always placed below it. Thus, the dependencies ofANN vs.NC, derived from computer simulations, can be used for the determination of the character of the interparticle interactions in the real systems.
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Trznadel, M., Slomkowski, S. Formation and morphology of latex monolayers. Computer simulation studies. Colloid Polym Sci 274, 1109–1118 (1996). https://doi.org/10.1007/BF00655681
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DOI: https://doi.org/10.1007/BF00655681