Surface Acoustic WaveAmmonia Sensors Based on ST-cut Quartz under Periodic Al StructureReportar como inadecuado




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Department of Electrical Engineering, I- Shou University, Kaohsiung County, 84001, Taiwan





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Abstract Surface acoustic wave SAW devices are key components for sensing applications. SAW propagation under a periodic grating was investigated in this work. The theoretical method used here is the space harmonic method. We also applied the results of SAW propagation studied in this work to design a two-port resonator with an Al grating on ST-cut quartz. The measured frequency responses of the resonator were similar to the simulation ones. Then, the chemical interface of polyaniline-WO3 composites was coated on the SAW sensor for ammonia detection. The SAW sensor responded to ammonia gas and could be regenerated using dry nitrogen. View Full-Text

Keywords: Rayleigh SAW; space harmonic method; ammonia; polyaniline-WO3 Rayleigh SAW; space harmonic method; ammonia; polyaniline-WO3





Autor: Cheng-Liang Hsu, Chi-Yen Shen * , Rume-Tze Tsai and Ming-Yau Su

Fuente: http://mdpi.com/



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