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Abstract
Competitive and cooperative adsorption from a mixture of deformable particles has been investigated by Monte Carlo simulation on a two-dimensional square lattice. Compact macromolecules (globular proteins) are modeled as soft particles made from connected subunits whose average configuration is determined by a potential that is coupled to the particle perimeter length and controls its deformability. Highly deformable macromolecules (disordered proteins and polysaccharides) are modeled as so-called fractal polymers of high conformational entropy. Numerical results show the dependence of the surface coverage and composition on the relative adsorption energies of the species and the strength of attractive interparticle subunit interactions. The importance of particle deformability and macromolecular interactions in relation to the structure of adsorbed layers is demonstrated by this model.
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