title: Polysilazane-induced aggregation of hydrophobic silver colloids.
abstract: Adsorbing polymers such as polysilazanes induce irreversible coagulation of hydrophobic silver colloids in nonpolar solvents. This is accompanied by broadening of the surface plasmon resonance (SPR) peak. A method to analyze the coagulation kinetics based on von Smoluchowski's theory utilizing the SPR change is described. The approach allows evaluating extinction spectra of aggregates of small sizes. A model for polymer adsorption kinetics in combination with a modified bridging efficiency model explains the observed coagulation inhibition over time in terms of macromolecules adsorption, spreading, and mutual repulsion.
authors.affiliation: Institute of Inorganic Chemistry, TU Bergakademie Freiberg, Leipziger Strasse 29, 09596 Freiberg, Germany. Vadym.Bakumov@chemie.tu-freiberg.de
authors.forename: Vadym
authors.initials: V
authors.lastname: Bakumov
authors.forename: Edwin
authors.initials: E
authors.lastname: Kroke