Controlling the self-assembly structure of magnetic nanoparticles and amphiphilic block-copolymers: from micelles to vesicles.

摘要: We report how to control the self-assembly of magnetic nanoparticles and a prototypical amphiphilic block-copolymer composed poly(acrylic acid) polystyrene (PAA-b-PS). Three distinct structures were obtained by controlling solvent−nanoparticle polymer−nanoparticle interactions: (1) polymersomes densely packed with (magneto-polymersomes), (2) core−shell type polymer assemblies where are radially arranged at interface between core shell (magneto-core shell), (3) micelles homogeneously incorporated (magneto-micelles). Importantly, we show that incorporation drastically affects structure block-copolymers modifying relative volume ratio hydrophobic block hydrophilic block. As consequence, micelle-forming typically produces magneto-polymersomes instead magneto-micelles. On other hand, vesicle-for...