Presentation Information
[23a-A309-6]Evaluation of chemical stability of substrate for remote plasmonic-enhanced Raman spectroscopy without close contact between analyte and metal nanostructure
〇(M2)Sota Inoue1, Hiroki Tanioka1, Takeshi Yasui2, Masahiro Kawasaki3, Mitsuo Kawasaki3, Minamikawa Takeo2 (1.Grad. Sch. Sci. Tech. Innov., Tokushima Univ, 2.pLED, Tokushima Univ., 3.Grad. Sch. Engg., Kyoto Univ.)
Keywords:
Raman scattering,Surface-enhanced Raman scattering,Plasmonics
SERS (surface-enhanced Raman spectroscopy) is a highly valuable technique that enables the acquisition of Raman spectra from low-concentration molecules with exceptional molecular sensitivity. However, the chemical instability stemming from the interaction between metal nanostructures and the analyte molecules has been a prominent issue. This study successfully demonstrated the chemically stable enhanced Raman spectroscopy through the utilization of remote plasmonic-enhanced Raman spectroscopy (RPERS). By employing silica column structures with dimensions on the order of tens of nanometers, we effectively separated the metallic nanostructures from the analyte molecules. Notably, the RPERS-enhanced signal exhibited significant enhancement, comparable to or even greater than the SERS-enhanced signal. We verified the exceptional chemical stability of the RPERS plate by comparing it with the conventional SERS plate involving solely metallic nanostructures.