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Abstract
The adhesion and cohesion of micrometer-size particles are governed by complex interactions involving van der Waals and electrostatic forces. For many applications, such as the toner particles used in electrophotographic engines, these interactions are rendered more complex by coating the surfaces of the particles with particulate addenda such as silica nanoclusters. Specifically, nanoclusters may affect either or both the surface forces and/or the electrostatic charge distribution on a microparticle. This can change both its attraction to a substrate as well as the interparticle Coulombic repulsion. This paper explores these interactions and describes their quantitative effects on adhesion and qualitative effects on cohesion.