Controlled Synthesis of Hollow TiO<sub>2</sub> Nanospheres Templated by Polymeric Micelle with Core-Shell-Corona Architecture

Hollow TiO 2 nanospheres have been successfully prepared by templating the polymericmicelles of poly (styrene-b-[3-(methacryloylamino)propyl] trimethylammonium chloride- b-ethylene oxide) (PS- b -PMAPTAC- b -PEO), which shows a core-shell-corona structure in aqueous solutions. It was found that, in such system, the wall thickness of the hollow TiO 2 is fine tuned by varying the concentration of the TiO 2 precursor.