One-Step Approach for the Preparation of Organic-Inorganic Janus-Like Particles by Alkalization of Polystyrene-block-Poly(2-vinylpyridine)/FeCl3 Complex Micelles

A novel approach to organic-inorganic Janus-like particles based on the alkalization process of polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) micelles containing FeCl3 precursors in the P2VP cores in toluene is presented. It is found that by addition of a small amount of NaOH solution to a solution of the spherical PS-b-P2VP/FeCl3 micelles, organic-inorganic Janus-like particles with a produced a-FeOOH domain on one side and PS-b-P2VP block copolymers on the other can be prepared. The Janus-like nanoparticles obtained by this facile approach may have potential application in biomedical areas.