Abstract
Pursuing a sensing structure with a large effective surface area, partial ordered arrays of ZnO nanorods with flower-like structures are introduced for gas sensing applications. Room temperature H2S response of the grown structure shows significant enhancement after modification with Au nanoparticles. High response (about 1270 at 6ppm H2S gas) and selectivity were achieved by depositing an Au layer with nominal thickness ∼6nm. X-ray photoelectron spectroscopy (XPS) was utilized to describe the H2S sensing mechanism.
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