Abstract
Flower-like ZnO nanorods with diameters less than 15 nm were synthesizedby a sonochemical method. The sensors fabricated from the nanorodsexhibited excellent ethanol sensing properties. At the working temperature of300 °C,their sensitivity was 176.8–100 ppm ethanol vapour. While the working temperature was reduced to140 °C, they were still able to detect ethanol vapour at the ppm level. The reduced workingtemperature may be attributed to the small sizes of the nanorods.
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