[19a-C206-1~8] 1.3 Novel technologies and interdisciplinary engineering

[19a-C206-4] High-Concentration Methanol Gas Sensing with WO₃ Nanoparticle Film under Visible Light at Room Temperature

〇Katsuyuki Naito¹, Naomi Shida¹ (1.Toshiba R&D Center)

Keywords:WO3, sensor, methanol

We developed high concentration sensing technology of methanol gas expected for P2C with safety and low cost. WO3 nanoparticles were coated on a comb-shaped Pt electrode and illuminated with a white LED at room temperature. The resistance decreased by 70% for high concentration methanol gas (17 vol%) and by 9% and 4% for 3.5 and 1.2 vol% methanol, respectively. The response is very small without light.