[11p-PB1-1~40] 3.12 Nanoscale optical science and near-field optics

[11p-PB1-36] Automatic fabrication of high-sensitive SERS-active nanogaps between Au sea and Au islands

〇Kei Shinotsuka¹, Lingfeng Shen¹, Kotaro Dai¹, Hisako Tokuno¹ (1.Oji HD)

Keywords:surface enhanced Raman scattering, nanogaps, melting point depression

By filling up the sea area with Au in the Au sea-island structure, we found that gaps are automatically fabricated between the sea and islands by surface tension of Au, in which width of the gaps becomes typically <10 nm. Raman scattering spectroscopy measurement of the novel Au nanostructure exhibited an increased Enhancement Factor up to the order of 10⁹, larger by 2 orders of magnitude than the conventional dispersed metal sea-island structure giving the order of 10⁷.