| 초록 |
Surface-enhanced Raman scattering (SERS) substrates have been fabricated by either bottom-up method or top-down approach. The former, for instance, particle growth in a solution, is very easy, but the uniformity of the size and the inter-particle distance become very poor, resulting in only a few places working as the hot spots. On the other hand, the latter based on electron-beam lithography allows one to have precise control of nano-pattern. But, the fabrication of nano particles (or patterns) with an inter-particle (or pattern) distance down to 10 nm on a large area (several cm^2) is very difficult. In this study, we achieve easy fabrication of silver nanoparticle with interdistance down to 10 nm by using crew-cut type polystyrene-block-poly(4-vinylpyridine) copolymer (PS-b-P4VP) micelles. We obtained a maximum SERS enhancement factor up to ~10^8 with an excellent reproducibility. |
