Abstract
This chapter provides an introduction on fractal reaction kinetics. Fractal kinetics typically exhibit noninteger kinetic reaction orders and may be used to make the degree of heterogeneity that exists on the surface more quantitative. An increase in the degree of heterogeneity on the surface may be described by a higher fractal dimension. The examples are described in the chapter where variability in the adsorption rate coefficients is exhibited and the possible reasons for such variability are given in protein adsorption systems. The importance of intermolecular interactions is indicated in the reaction layer to the binding kinetics of an antigen to an immobilized antibody. Experimental evidence is also available that provides for attractive interactions in the surface-bound antibodies. The repulsive interactions are related in the reaction layer to the passivation of surfaces and analyzed the influence of a variable adsorption rate coefficient on protein adsorption. Data are presented in the chapter indicating that cohesive forces among macromolecules help stabilize the adsorbed proteins and antigen–antibody complexes at solid surfaces.
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