Engineering the depletion layer of Au-modified ZnO/Ag core-shell films for high-performance acetone gas sensing

[Display omitted] •Au decorated ZnO/Ag core-shell films (Au/ZnO/Ag) are synthesized via a DC sputtering followed by post annealing treatment.•The Au/ZnO/Ag showed enhanced acetone response as compared to ZnO/Ag and pure ZnO.•The Au/ZnO/Ag core-shell film exhibits excellent gas sensing properties to...

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