Presentation Information
[20a-D901-3]Graphene Surface Acoustic Wave Gas Sensor for Effective Detection of Acetone down to Ppt Levels in the Air Atmosphere
〇Haolong Zhou1, Sankar Ganesh Ramaraj1, Hiroyasu Yamahara1, Hitoshi Tabata1 (1.Univ. of Tokyo)
Keywords:
Surface Acoustic Waves,Graphene,Acetone
With the advent of modern urbanization, humanity has grappled with numerous health and environmental challenges, leading to a gradual reduction in human lifespan [1–2]. In order to enhance human longevity and well-being, there is a pressing need for a real-time health monitoring device. The surface acoustic wave (SAW) sensor has garnered considerable attention due to its superior thermal stability, lower phase noise compared to crystal resonators, exceptional quality, and temperature characteristics [3]. The SAW resonator operates based on surface phenomena, and any disturbance on the surface of the sensing layer (such as mass load, electrical load, elastic load) can significantly affect the propagation of sound waves, leading to changes in frequency, phase, and amplitude. Therefore, SAW sensors are exceedingly attractive for gas sensing applications. In this study, we have successfully fabricated monolayer graphene surface acoustic wave gas sensors (G-SAW) utilizing love mode waves for the efficient detection of acetone gas molecules at parts per trillion (ppt) levels at room temperature.