| 초록 |
Noble metal nanoparticles, i.e., Au, Ag, and Cu, have been received increasing attention as a visible light-driven photocatalysts due to their unique optical property by localized surface plasmon resonance (LSPR). However, metal nanoparticle based-photocatalysts have restrictions that these charge carriers cannot effectively participate in chemical reactions because the rate of recombination of excited electrons and holes is extremely fast. To improve the rate of photochemical reaction, a key point is that the length between excited electrons and chemical substances needs to be shortened. To do this, we designed the closely packed cavities, in which the chemical substance could be captured, by inducing agglomeration of nanocrystals. We compared the electron transfer kinetics in plasmonic photocatalyst between the free-standing colloidal system and the aggregation-induced system, as well as compared the reaction kinetics between gold nanoparticles and gold nanoclusters. |
