A layered surface acoustic wave gas sensor based on a polyaniline/In₂O₃nanofibre composite

Abstract

A layered surface acoustic wave gas sensor based on a polyaniline/In2O3 nanofibre composite

A ZnO nanorod based layered ZnO/64° YX LiNbO3 SAW hydrogen gas sensor

“…Then, hydrothermal growth of high quality densely packed and well oriented single crystalline ZnO nanorods with average diameters of about 100 nm on LiNbO 3 and 40 nm on gold have been achieved. In SAW device, change in electrical conductivity perturbs the electro-acoustic properties of the propagating acoustic wave, resulting in a change in the velocity of the acoustic wave propagation [21]. Deviations in velocity are monitored by measuring the changes in frequency.…”

Hybrid Pva-In2o3 Nano Thin Film for Transparent Optical Devices

“…The XRD patterns revealed a broad pattern (characteristics of small particle size) at 2θ=20-38 o was obtained for both as grown and for films subjected to annealing at 50˚C, 100˚C, 150˚C [20]. The diffraction phase around 2θ =9, 25 and 55˚ corresponding to PVA crystalline phase [21], whereas Bragg's reflection at 22, 30, 36, 51 and 61 o corresponding to (211), (222), (400), (440) and (622) of cubic phase of In 2 O 3 [22].…”

Acoustic Wave Based MEMS Devices, Development and Applications

“…Among examples of fabricated SAW devices are as components in satellite receivers, remote control units, keyless entry systems, television sets to identification tags (Campbell, 1998;Hikita et al, 2000;Springer et al, 1998). Other emerging applications of SAW resonators include gas sensors (Sadek et al, 2006), biosensors (Z. Xu, 2009), chemical (Nomura et al, 1998), temperature and pressure sensors (Buff et al, 1997). The significance of these devices in this industry can be measured in numbers by the worldwide production of these devices, where approximately 3 billion acoustic wave filters are used annually, primarily in mobile cell phones and stations (Reindl et al, 1996).…”