Mechanism of the cooperative adsorption of oppositely charged nanoparticles.
Quartz crystal microbalance experiments were performed to study the kinetics of surface adsorption from solutions containing oppositely charged nanoparticles. A theoretical model was developed according to which formation of dense nanoparticle (NP) monolayers is driven by a cooperative process, in which the already-adsorbed NPs facilitate adsorption of NPs from solution. The kinetic rate constants change with the NP solution concentration and can be used to backtrack adsorption free energies. These energies agree with the predictions of a simple DLVO model.
Tretiakov
Konstantin V
KV
Department of Chemical and Biological Engineering and Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Bishop
Kyle J M
KJ
Kowalczyk
Bartlomiej
B
Jaiswal
Archana
A
Poggi
Mark A
MA
Grzybowski
Bartosz A
BA