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Nagoya Institute of Technology
Gokiso, Showa, Nagoya 466-8555, JAPAN
--- Interface phenomena and functionality ---

Physical and chemical phenomena emerging at surfaces and interfaces play an important role in realizing various functions on a solid surface.  In particular, electron transfers at solid-liquid interfaces can mediate the interactions between electrical energy and chemical change.  Thus,  deep insights for controlling interfacial electron transfers is required for further advancement in energy technology.  We investigate electron transfer phenomena using various spectroscpic and electrochemical methods for characterization and modification of solid surfaces on the atomic and molecular scale.

<Research interests>
- Electrochemical and spectroscopic investigations of electrified interfaces
- Atomic and molecula scale design of functional surfaces
- Development of novel spectroscopic methods

1. Nanoscale field localization at planar metal surfaces
 In the visible wavelength region, light-matter interactions are essentially weak.  Therefore, optically thick and physically thin photofunctional layers are needed to achieve highly efficient photo-energy conversion.  Localized surface plasmon resonances can confine photon energy in the vicinity of metal nanostructures.  Fig. 1 shows a sphere-plane type nano-gap structure, which can be formed on planar metal surfaces covered with molecular thin layers.  In our group, this structure is utilized for enhancing both the efficiency of photon-energy conversion and the sensitivity of surface spectroscopy. 
Fig. 1. Nanoscale field localization through excitation of hybridized gap-mode plasmons

2. Well-defined interfaces