Probing evolution of interactions leading to clustering of charged nanoparticles dispersion.
We have observed a re-entrant phase behavior in nanoparticle (silica) and polymer (PEG) system where nanoparticles (silica) undergo particle clustering and back to individual nanoparticles as a function of polymer (PEG) concentration. The phase behavior is believed to be governed by the interplay of different interactions (i) electrostatic repulsion between nanoparticles, (ii) polymer-induced attractive depletion between nanoparticles and (iii) repulsive polymer-polymer interaction present in the system. We propose to carry out SANS measurements to model these interactions and determining the possibility of equilibrium cluster phase under the influence of these short/long range opposing forces.
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KUMAR Sugam; ASWAL Vinod K.; MEHAN Sumit; D. Ray and SCHWEINS Ralf. (2015). Probing evolution of interactions leading to clustering of charged nanoparticles dispersion.. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-395
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