[17a-A305-1~9] 3.11 Nanoscale optical science and near-field optics (formerly 3.12)

[17a-A305-7] Surface-enhanced Raman scattering with silica-coated silver tree-like structure

〇(M1)Hiroya Watanabe¹, Yurin Hishii¹, Toshihiko Kiwa¹, Satoru Shoji², Takahiro Ohkubo¹, Jun Kano¹, Nobuyuki Takeyasu¹ (1.Okayama Univ., 2.The Univ. Electro-Commun.)

Keywords:silver tree-like structures, surface-enhanced Raman scattering, silica coating

When precious metal nanostructures are irradiated with light, an enhanced electric field is formed on the metal surface due to localized surface plasmon resonance. This enhanced electric field produces a large Raman signal from the adsorbed/bonded molecules on the nanostructure surface (surface-enhanced Raman scattering: SERS). On the other hand, the adsorbed/bound molecules are oxidized/reduced and the molecular structure is changed. In this study, the chemical reactions of the target molecules in the SERS measurements were suppressed by coating the entire silver tre-like structure with a silica thin film using a wet process.