掲載日：
講演会
開催日：
| 日時 | 2024年7月1日(月) 16:00 – 17:00 |
|---|---|
| 会場 |
オンライン開催
|
| 講師 | Dr. Aurelian Marcu(Center for Advance Laser Technology, National Institute for Laser Plasma and Radiation Physics (CETAL-INFLPR) ) |
| 題目 | Nanowire Based Surface Acoustic Wave Sensors |
| 要旨 | Sensors are a crucial issue of the modern technology progress, relaying more and more on nano-materials and nanotechnology. Among different types of sensors, Surface Acoustic Wave (SAW) sensor is having very good performances in terms of sensibility and detection limit. SAW sensor uses acoustic waves propagating over a piezoelectric surface and its functionality is based on the wave propagation changes while propagating through the active medium area. Thus, ‘active layer’ mechanical properties modification induced by the presence of an analyt is the key process of the sensor. While the active area surface is a crucial parameter for sensor sensitivity, nanostructured surfaces become more and more popular in sensor fabrication, moving the focus from the absorbtion to adsorbtion process as ‘sensing’ process. Furthermore, for this particular type of sensor, spatial positioning and morpho-structural properties of the nanostructures play a significant role in minimizing the senor noise (and consequently detection limit) and in controlling sensor detection range and response time. ZnO nanowire based SAW sensors were fabricated on a quartz surface using a special Pulsed Laser Deposition technique with Plasma Reflection (PLD-PR) and Vapour-Liquid-Solid (VLS) growing approach. Starting from the SAW sensor operation principles, some performances in hydrogen (isotopes) detection in correlation with nanowire morphology and positioning are presented. |
| 主催 | 電子科学研究所 学術交流委員会 |
| 世話人 | 長島一樹（インタラクション機能材料研究分野） |
