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ZnO nanostructures were grown from a solution of zinc nitrate hexahydrate and hexamethylenetetramine onto different substrates that were pretreated with an RF sputter coated ZnO seed layer. The choice of substrate was observed to have a direct effect on the morphology, orientation and surface coverage of the nanostructured arrays. Substrates that were covered in a 1.2 mum sputter coated ZnO seed layer,...
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...
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...
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