부산대학교 도서관

This paper describes efficient light-driven self-assembly by high-SA/V (Surface Area to Volume)-ratio TiO 2 -nanoparitcle-encapsulating hydrogel unit. The shape of the hydrogel units can be designed to achieve complex and efficient self-assembly system. Our TiO 2 -nanoparticle-encapsulating hydrogel unit has a high SA/V ratio rather than TiO 2 particles, bringing a high ion concentration gradient and large driving force. We achieved the velocity control of silica colloids by changing TiO 2 -nanoparticle-concentration and demonstrated a silica colloid accumulator with our hydrogel unit. We believe that our efficient light-driven self-assembly could applied to a micromotor with complex motion and a functionality microdevice for using in nature.