Capillary Force Induced Formation of Monodisperse Polystyrene/Silica Organic−Inorganic Hybrid Hollow Spheres

摘要: This paper presents a “one-spot” procedure to fabricate polystyrene/silica (PS/SiO2) hybrid hollow spheres. In this approach, when poly(vinylpyrrolidone)-stabilized PS colloids were deposited by sol−gel derived silica layer under acidic medium, it was interesting find that the PS/SiO2 core−shell gradually changed structure spontaneously in same medium as reaction went on. The formation of should be attributed diffusion macromolecular chains from core particles into voids between nanoparticles driven strong capillary force.