The 79th JSAP Autumn Meeting, 2018

Presentation information

Oral presentation

4 JSAP-OSA Joint Symposia 2018 » 4.1 Plasmonics and Nanophotonics

[19p-211B-1~14] 4.1 Plasmonics and Nanophotonics

Wed. Sep 19, 2018 1:15 PM - 6:00 PM 211B (211-2)

Katsumasa Fujita(Osaka Univ.), Yasushi Inoue(阪大)

3:45 PM - 4:15 PM

[19p-211B-8] [INVITED] In-situ ultra-low frequency SERS spectroscopy at electrified interfaces

Katsuyoshi Ikeda1 (1.Nagoya Inst. Tech.)

Keywords:terahertz vibrations, in-situ observation, surface science

Surface-specific vibrational spectroscopy is recognized as a powerful tool for in-situ observation of electrode/electrolyte interfaces. However, terahertz (THz) or far-infrared (FIR) absorption spectroscopy is hardly applicable to in-situ observation of such “buried” interfaces, especially for detecting low frequency extramolecular vibrations including rich information on electrode/molecule interactions. On the other hand, surface enhanced Raman scattering (SERS) spectroscopy has a potential advantage in detecting such low frequency vibration modes even under electrochemical conditions. Based on recent technological advancements in fabrication of optical notch filters, we have extended the detectable frequency range of SERS into the ultra-low frequency region. Moreover, this ultra-low frequency SERS was combined with sphere-plane type gap-mode SERS method, which enabled us to conduct SERS spectroscopy even at atomically defined single crystalline surfaces of various metals.