Scheme 1. (a) Chemical Structures of 2-Vinylpyridine (2VP), Benzyl Methacrylate (BzMA), and Poly(ethylene glycol) Methacrylate (PEGMA), and Schematic Representation of the Physical Adsorption of Graphene Oxide Nanosheets onto Sterically Stabilized (b) PEGMA-Stabilized P2VP and (c) P2VP–PBzMA Latexes via Electrostatically Induced Heteroflocculation.