| 초록 |
We fabricated the half-onion like microdomains of polystyrene-block-poly(methyl methacrylate) copolymer (PS-b-PMMA) by using hemi-spherical anodic aluminum oxide (AAO) template. The ring number of the concentric ring patterns was controlled by changing the molecular weights of the block copolymers, which was verified by scanning and transmission electron microscopes and atomic force microscope. We deposited silver with 6 nm height selectively on the PS microdomains. A number of silver ring patterns were varied from 5 to 8 depending on the molecule weights of the block copolymer. This silver ring structures showed high surface enhanced Raman scattering (SERS) with a maximum enhancement factor of 107. Acknowledgement: This work was supported by the National Creative Research Initiative Program supported by the National Research Foundation of Korea (NRF) and the second stage of the BK 21 program of Korea. |
