| 초록 |
Localized surface plasmon resonance of metallic nanostructures receives noticeable attention in photonics, electronics, catalysis and so on. Core-shell nanostructures are particularly attractive owing to the versatile tunability of plasmonic properties along with the independent control of core size, shell thickness and corresponding chemical composition, but commonly suffer from difficult synthetic procedures. We present reliable and controllable route to highly ordered uniform Au@Ag core-shell nanoparticle array via block copolymer lithography and subsequent seeded-shell growth. Size-tunable monodisperse Au nanodot arrays are generated by block copolymer self-assembly and used as seed layers to grow Ag shells with variable thickness. The resultant Au@Ag core-shell nanoparticle arrays exhibit widely tunable broadband enhancement of plasmonic resonance that greatly surpass single element nanoparticle or homogeneous alloy nanoparticle arrays. |
