ETHANOL VAPOR SENSING PROPERTIES OF ZnO/CuO NANOCOMPOSITES

Do Duc Tho

Abstract


CuO leaf-like with thickness of 20 nm, and ZnO plates with thickness of 40 nm have been successfully prepared through a wet chemical method. The two materials were mixed with different weight ratios (CuO/ZnO) to produce nanocomposite materials. Ethanol vapor sensing properties of films derived from obtained materials on SiO2/Si substrates attached with Pt interdigitated electrodes were investigated at operating temperatures in the range of 250 C – 400 C and ethanol vapor concentration in the range of 125 - 1500 ppm. The results showed that the composite of 30 wt% CuO/70 wt% ZnO exhibited the highest response to ethanol vapor at an optimum temperature of 375 oC.


Keywords


ZnO nanoplates, leaf-like CuO, nanocomposites, sensor.

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DOI: https://doi.org/10.15625/2525-2518/54/1A/11816 Display counter: Abstract : 43 views. PDF : 49 views.

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Published by Vietnam Academy of Science and Technology