GU Chun-hu, YIN Chen-bo, ZHU Ya-jun, et al. Analysis on hydrogen sensitive characteristics of SAW gas sensor with Pd nanowires[J]. 2015, 34(3): 34-36. DOI: 10.13873/j.1000-9787(2015)03-0034-03.
A three-dimensional model of surface acoustic wave( SAW) sensor with Pd nanowires is developed using COMSOL Multiphysics. The sensor consists of YZ-lithium niobate substrate and interdigital electrodes which is fixed on the surface
relationship between length of nanowires and eigenfrequency is analyzed. A 20V voltage signal is applied on the IDT and the result of admittance and eigenfrequency shift is observed. In order to achieve H2 characteristics of the gas sensor
Pd film is deposited by magnetron sputtering and the test fixture is designed.The gas sensor with Pd nanowires show higher sensitivity than that with Pd film
by comparing the simulation results with experimental results.