| 초록 |
Mixing of Ag+ doped PEI and PAA produced polyelectrolyte complexs (PECs) in solution. Positively charged Ag+doped PECs (PECs-Ag+) were deposited alternatively with PAA for multilayer assembly. The multilayered film involving PECs-Ag+ was reduced to generate a composite nanostructure. Metal NP-enriched nanocomposite films were formed by additional post-adsorption of precursors on PECs within the films, which resulted in enhancing catalytic and electrical properties of the composite films. Since the films contain PECs which can response to pH changes and most of NPs are embedded in the PECs, interesting catalytic properties which are not expected in particle-typed catalyst were observed upon pH changes. Owing to reversibly structural changes of the films and tight immobilization of NPs within the films, film-typed catalysts showed enhanced performance and stability during the catalytic reaction under various pH conditions, compared to particle-typed catalysts. |
