Evolution of structure and interaction during aggregation of silica nanoparticles in aqueous electrolyte solution

摘要: Abstract Aggregation behavior of silica nanoparticles in aqueous electrolyte solution has been studied by small-angle neutron scattering. It is found that there local crowding with increase concentration followed the formation permanent clusters above critical salt concentration. The these structures explained on basis two minima observed DLVO theory secondary minimum and primary resulting particle clustering, respectively. role varying nanoparticle size counterions also examined, where aggregation follows similar but can be tuned parameters.