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Poly-vinyl-pyrrolidone (PVP) is one of the actylene chemistry products founded by Prof Walter Reppe. In most cases, PVP usually presents as an essential auxiliary, not an active substance itself . Until recently, He et al. has reported the application of PVP fibers as H2 gas sensor. Extending from the reported investigation, this work shows the gas sensing properties of PVP/MWNTs composite/36° YX...
The gasochromic performance of WO3 nanotextured thin films coated with catalytic Pd or Pt layers were investigated for low concentration H2 sensing. The 25?? thick catalytic metals were deposited onto 200nm thick sputtered WO3 films. It was found that the Pd/WO3 thin films show superior gasochromic response when compared with Pt/WO3 thin films. Integrating the absorbance change over a range of visible...
Conductometric H2 and NO2 gas sensors based on single-crystalline ZnO nanobelt sensitive layers have been developed. These layers were deposited using a rf magnetron sputterer. TEM and SEM characterization methods were employed to study the morphology of the nanobelts. These sensors were exposed to H2 and NO2 gases at operating temperatures between 225degC and 420degC. Study showed that sensors responded...
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