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Abstract
Ferritin adsorption on a hydrophobic quartz surface was measured at different bulk concentrations and adsorption times. The initial slope of the isotherms increases with increasing bulk concentration. The pair correlation function, g( r), was obtained from the spatial distribution of adsorbed ferritin molecules on a quartz surface. The potential of average force was found to be around 1.4 kT, and clusters that are kept together by this potential are found to be stable only for less than a second. Ferritin molecules adsorbed on a hydrophobic quartz surface at low concentration (1 mg l −1) were found to interact at distances up to 5 radii. A theoretical model describing the kinetics of adsorption, desorption and cluster dissociation on an ideal surface was also derived.
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