研究論文

A periodic array of nanoholes was fabricated via the self-assembly of a polystyrene(PS)-b-poly(Me methacrylate) (PMMA) block copolymer (BCP) on a Si substrate and selective etching of the PMMA moieties. Ag nanorods (AgNRs) were then selectively deposited in the nanoholes by a galvanic displacement reaction where the pattern was hexagonally aligned according to the template. The diameter of AgNRs was controlled by changing the immersion time. Optical measurements of the AgNR arrays revealed that the extinction peak was split into two because of the electromagnetically induced transparency effect. The AgNR arrays showed a surface-enhanced Raman scattering response and were successfully transferred from a Si substrate to a transparent and flexible polymer film while retaining the rod arrangement.