Research Group Detail
Unique Structures, Physicochemical Properties and Quantum Dynamics of Molecular Aggregates at Solid Surfaces
Water Molecule, Molecular Spectroscopy, Surface Science
Surfaces and interfaces are the places where the spatially isolated electrons in molecules meet delocalized ones in substrates such as metals. Under such circumstances, molecules behave very differently from those in gas and liquid phases. Unexpected molecular processes sometimes take place at surfaces and interfaces. There are many important applications where surfaces/interfaces play an impor tant role, such as photovoltaic application for energy conversion and catalytic application for chemical reaction. These all depend on specific many-body complex interactions that are not always fully understood. Our ultimate aim is to elucidate such cooperative interactions at the molecular level.
By using state-of-the-art molecular spectroscopy in combination with sophisticated surface scientific techniques, we have elucidated unique structures, physical properties, chemical functions, and quantum dynamics of hydrogen, water molecules and their assemblies at surfaces/interfaces of solid materials 1-5). In addition, we are challenging to develop innovative microspectroscopy with atomic resolution for directly observing the local structure of protons in the unique hydrogen-bond network of water molecular aggregates at solid surfaces/interfaces.
Fig. 1 Infrared-visible sum-frequency-generation (SFG) spectroscopy of water molecules on solid surface 3).
Fig. 2 Unimolecular inelastic-electron-tunneling (IET) spectroscopy of quantum rotator on solid surface 2).