| 초록 |
Noble metals exhibit surface plasmon resonances (SPR), whcih is a unique optical response that occurs upon interaction with incident electromagnetic radiation such as light at specific wavelengths within the visible ~ near infrared spectrum. It has been investigated that the SPR can improve the efficiency of photocatalytic activity and the effect is extremely sensitive to the distance between the constituent elements. Considering this critical issue, in this work, poly(N-isopropylacrylamide) (PNIPAM) brushes were anchored on Au films by atom transfer radical polymerization and ZnO nanoparticles were immobilized on the PNIPAM layer to explore controlled plasmon-enhanced photocatalytic activity. The effect of the areal density of PNIPAM chains on the temperature-responsive UV light photocatalytic activities showed mutually antagonistic trends at two different temperatures. The visible light activity was induced only for thin PNIPAM layer and high density, and it was higher above LCST. |
