Professor Jun Kondoh (Shizuoka University, Japan)
Location: Stephenson Building, room F1 (first floor)
Time/Date: 2nd September 2013, 14:00 - 15:00
A surface acoustic wave (SAW) device has been widely used as a filter in mobile communication systems. When an adjacent medium on a SAW-propagating surface physically and chemically changes, a SAW is perturbed. A SAW sensor works by detecting perturbations. When a liquid is loaded onto a SAW-propagating surface, liquid properties can be measured using the SAW sensor. For this purpose, a shear horizontal surface acoustic wave (SH-SAW) has been utilized. Detection mechanisms of an acoustic wave based sensor are mechanical and electrical perturbations. Liquid properties, such as density and viscosity products, conductivity, and permittivity, can be detected using the SH-SAW sensor. Also, loaded mass onto the surface and viscoelastic properties of liquid and film can be detected using the SH-SAW sensor. Based on these perturbations, many applications of the SH-SAW sensors have been proposed.
In this seminar, first, fundamentals and detection mechanisms of the SH-SAW sensors are explained. Then several applications of the SH-SAW sensors, such as liquid identification, measurements of blood clotting, and methanol sensor for a direct methanol fuel cell are presented.
Jun Kondoh received his BE degree in 1990, his MS degree in engineering in 1992 and his doctor of engineering degree in 1995, all from Shizuoka University. From April 1993 to March 1997, he was a research fellow of the Japan Society for the Promotion of Science. In 1996, he was a guest scientist at Karlsruhe Research Center, Germany. In April 1997, he joined the Department of Systems Engineering, Shizuoka University as a research associate. Now, he is a professor of the Graduate School of Science and Graduate School of Engineering. His current research interests include surface acoustic wave sensors surface acoustic wave actuators, surface plasmon sensors, and interdigital electrode sensors.
Published: 13th August 2013