Sensing function such as sensitivity, selectivity, response etc. can be improved through controlling of geometry and assembly of materials. The aim of our activities is the development of high-controllable bottom-up process for nano-powder assembly and ultra thin mm synthesis to realize novel sensor devices. We
explore the potential of developing materials for sensor, specifically, creating 3D structure of nano-powders and ultra thin films, and searching novel method of their compositional controlling essential for sensor applications.

A huge class of materials undergoes a spontaneous ordering with respect to atomic/ionic displacement or spin below a characteristic temperature;they are called ferroic materials.Such ferroic transitions result in ferroelectricity,magnetism and ferroelasticity,and generate interesting effects like piezoelectric effect,pyroelectric effect,magnetostriction,megnetoelectric effect and shape memory effect. Ferroic materials play an indispensable role in our modern society as major energy-conversion materials bridging electrical,magnetic and mechanical energy. Our group studies the physics of these materials and aims to discover novel properties and/or materials useful for applocations,in particular as sensors.

The aim of our group is establish a growth technology for fabricating high-quarity films of wide-gap semiconductors (such as diamond. nitride semiconductors, and oxide semiconductors) and to develop a deep-ultraviolet(DUV:wavelength less than 280nm)photosensor with high efficiency. high sensitivity,and high response speed. Furthermore,we pursue possibility as a chemical sensor divice by demonstrating detection performance of ultraviolet rays appearing from fluorescence of a toxic substance and flame.

Intelligent micro systems consistng of sensors,actuators and processors are expected to realize advanced sensing and monitoring. The aim of our activities is the development of new-type microactuators which facilitate the construction of such intelligent systems. Shape-memory alloy(SMA) thin films exhibit large force and displacement and are considered to be a promising actuator for controlling microfluid systems.