| 초록 |
We established a new approach toward the synthesis of size tunable and location-controlled gold nanoparticles (AuNPs) using ionic block copolymers. The materials employed in present study are a series of partially sulfonated poly(styrene-b-methylbutylene) (SnMBm) copolymers. These ionic block copolymers possess 35 nm sized ionic domains within self-assembled microstructures. On the ionic domains, Au ions can be selectively sequestered in a liquid phase and subsequently reduced to AuNPs using a simple photochemcal method (UV-irradiaion). In addition, the size of AuNPs can be controllable from 2 nm to 4 nm by adjusting sulfonation levels of SnMBm copolymers. The surface Plasmon property was also tunable by modulating the distance between the AuNPs. In particular, improved electrocatalytic activity toward methanol oxidation was achieved with our hybrid materials owing to the ion conducting SO3H groups and the interconnected network of AuNPs, which provides electronic conductivity. |
