| 초록 |
Surface plasmon resonance is the collective oscillation of the free charges in conducting materials such as gold and silver. Noble metal nanostructure coupled with responsive polymer can be used to probe unique plasmonic properties associated with swelling-shrinking transitions in polymer chains triggered by specific external stimuli. Here, thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) brushes were fabricated on the Au film by atom transfer radical polymerization and ZnO nanoparticles were immobilized on them. By regulating the synthesis conditions, grafting density and molecular weight of PNIPAM was elaborately controlled and, consequently, photocatalytic activity was influenced by various features involved in the ZnO-PINIPAM-Au film. According to the change in temperature with respect to the lower critical solution temperature, the distance between Au films and ZnO nanoparticles changes, resulting in plasmonic-coupling-controlled photophysical properties. |
