Professor, Faculty of Advanced Science and Technology
My research goal is to sense objects that have been impossible to measure. Porous ferroelectric materials show excellent sensor possibility due to flexibility, robustness, and high signal-to-noise ratio. Current research interest is development of new porous ceramic-ceramic composite materials and monitor biomedical/industrial objects real-time continuously.
1.New porous ceramic-ceramic composite
Ceramic (powder)/Ceramic(sol-gel) porous composite can enhance ferroelectricity of powder phase due to electrical field concentration. The study aims to develop a ferroelectric thin-film capacitor that exhibits quite high energy density by exploiting the characteristic feature of the superlattice structure. For the fabrication of the ferroelectric superlattice, pulsed-laser deposition method with a reflection high energy electron diffraction system is used.
Characterizes coronary artery disease (CAD), myocardial infarction (MI), and congestive heart failure (CHF) by measuring electrocardiogram (ECG) and ultrasound.
Undiagnosed CAD progresses rapidly, leading to MI by reducing blood flow to the heart muscle. Early diagnosis of MI and its location is important. Otherwise, the left ventricular (LV) function may expand and be impaired. Therefore, if CAD and MI are not detected during diagnosis, it can lead to congestive heart failure (CHF). In this project, ultrasound signals by patchable sensors and ECG signals are used to characterize three cardiac abnormalities: CAD, MI, and CHF. To achieve this goal, we are developing a patch-type wireless ultrasonic sensor.
Low carbon society/carbon-free society has been trend to realize sustainable world. Many innovative technologies, such as new generation thermal plants and light-metal alloy manufacturing, have been developed. New technology often causes unexpected phenomena, so real time process monitoring during operation has been desired to achieve safety and efficiency, simultaneously. However, operation temperatures of those technology are relatively high, 600-800°C, and it makes difficult to apply process monitoring technology, except parameter monitoring by temperature and pressure sensors. Ultrasound sensors made by porous ferroelectric films can be integrated into real industrial machines and give real-time data for process monitoring.
The NRC’s Impact Award, National Research Council of Canada, Dec. 12, 2022