2004/11/10 by S. Karanikas, A. A. Louis, Ard A. Louis · 1 citation
Chemistry · Materials Science · Physics and Astronomy · #Electrostatics and Colloid Interactions #Material Dynamics and Properties #Pickering emulsions and particle stabilization #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.1103/physrevlett.93.248303
published as Phys. Rev. Lett. 93, 248303 (2004) · to appear in Phys. Rev. Lett. See also J. Liu and E. Luijten cond-mat/0411278
arxiv created 2004/11/10 · openalex publication_date 2004/12/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We explore the conditions under which colloids can be stabilized by the addition of smaller particles. The largest repulsive barriers between colloids occur when the added particles repel each other with soft interactions, leading to an accumulation near the colloid surfaces. At lower densities these layers of mobile particles (nanoparticle halos) result in stabilization, but when too many are added, the interactions become attractive again. We systematically study these effects--accumulation repulsion, reentrant attraction, and bridging--by accurate integral equation techniques.