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Presented is the material and gas sensing properties of graphene-like nano-sheets deposited on 36deg YX lithium tantalate (LiTaO3) surface acoustic wave (SAW) transducers. The graphene-like nano-sheets were characterized via scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The graphenelike nano-sheet/SAW sensors were exposed to different...
Polyaniline/SnO2 nanoflber based surface acoustic wave (SAW) gas sensor has been investigated towards hydrogen (H2) gas. Chemical oxidative polymerization of aniline was employed to synthesize polyaniline nanofibers with SnO2 nanoparticles. The nanocomposite was deposited onto a layered ZnO/64deg YX LiNbO3 SAW transducer. The sensor was exposed to various concentrations of H2 gas and operated at room...
Zinc oxide (ZnO) nanorod based surface acoustic wave (SAW) gas sensor has been developed. ZnO nanorods were deposited onto a layered ZnO/64deg YX LiNbO3 substrate using a liquid solution method. Micro-characterization results reveal that the diameter and area density of ZnO nanorods are around 100 nm and 107 cm-2, respectively. The sensor was exposed to different concentrations of CO in synthetic...
A polyaniline (PANI) nanofiber based surface acoustic wave (SAW) gas sensor, has been developed and investigated towards hydrogen (H2) gas. A template-free, rapidly-mixed reaction approach was employed to synthesize polyaniline nanofibers, which utilized chemical oxidative polymerization of aniline. Hydrochloric acid (HCl) was used as the dopant acid in the synthesis of the polyaniline nanofibers...
In this work a surface acoustic wave (SAW) gas sensor based on a 64deg YX LiNbO3 substrate has been developed. The sensitive layer consists of electropolymerized polyaniline nanofibers. Device was tested towards hydrogen gas
Monitoring of air-quality it is a major task nowadays as the emission of pollutant gases increases particularly in urban areas. Ozone (O3) is a significant toxic pollutant and presents health risks. We have developed ozone sensors using a surface acoustic wave (SAW) based devices. The sensors structure consists of a lithium tantalate piezoelectric (LiTaO3) substrate with silicon nitride (SiNx) intermediate...
Single crystal nanobelts of ZnO were synthesized and deposited onto 36deg YX LiTaO3 and 64deg YX LiNbO3 surface acoustic wave (SAW) devices for gas sensing applications. Sensor response, defined as the change in resonant frequency, was measured for H2 and NO2 between 20 and 200degC. Measured sensor responses were 3.5 kHz towards 10 ppm NO2 for a 64deg LiNbO3 SAW transducer operating at 160degC and...
Palladium (Pd) nanowires were synthesized by electro chemical deposition technique. Pd nanowires were transferred onto a ZnO/36deg LiTaO3 surface acoustic wave (SAW) transducer with an approximate operating frequency of 100 MHz. This operational frequency approximately corresponds to the device's highest conductometric sensitivity. These devices were investigated for hydrogen (H2) sensing at the room...
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