| 초록 |
We introduce a novel and versatile approach for the preparation of multilayers based on catalase-encapsulated gold nanoparticles (CAT-AuNPs) allowing electrostatic charge reversal, and structural transformation through pH adjustment. CAT-AuNPs, which synthesized directly from CAT stabilizer, can be electrostatically assembled with anionic and cationic PEs as a result of charge reversal of catalase stabilizers through pH control. In particular, at pH 5.2 near pI of catalase, dispersed CAT-AuNPs are structurally transformed into colloidal or network CAT-AuNPs nanocomposites. Furthermore, we demonstrate that the layer-by-layer assembled multilayers composed of PEs and CAT-AuNPs induce the effective electron transfer between CAT and electrode as well as the high loading of CAT and AuNPs, and resultantly exhibit the highly catalytic activity toward H2O2. |
