Fabrication of Fe_3O_4 nano-aggregates hybrid material via self-assembly of nanocapsules based on amphiphilic hyperbranched polyglycerols

摘要

An amphiphilic hyperbranched polyglycerol (AP-HPG) with core-shell structure was synthesized based on hyperbranched polyglycerol (HPG) modified by oleic acid, which was firstly employed for the synthesis of Fe_3O_4 based on its property as nanocapsule. To our surprise, the resulting Fe_3O_4 aggregates (ca. 500 nm) formed in the shape of fusiform, egg-shaped and short rod-like when the concentration of AP-HPG ranged from 0.05 Mm to 0.12 mM, suggesting the nanocapsule formed at different concentration of AP-HPG can induce a various sizes and shapes of Fe_3O_4 nanoparticle aggregate via self-assembly.