Terahertz Analysis of Electrochemical Interfaces Using Surface-enhanced Raman Scattering

Surface-selective terahertz spectroscopy can provide rich information about dynamic behaviors of ions and solvent molecules in the vicinity of electrode surface, which helps us to get deeper insights into electrochemical reactions at the molecular level. However, there existed technical limitations to conduct such spectroscopic studies in the terahertz region. Recently, we have developed a terahertz vibrational analysis method for surface-enhanced Raman spectroscopy, in which a measured spectrum is converted to a vibrational density of states format. This review introduces some examples of our terahertz spectroscopic studies performed at various electrochemical interfaces.