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Design of the fabricated artificial olfactory system. a) Optical micrograph of the artificial olfactory system. b) SEM images of the artificial olfactory system unit and c) AND‐type NVM array. d) Energy‐dispersive X‐ray spectroscopy (EDS) mapping image of the fabricated gas sensor. e) Top SEM image of the ZnO film. f) AFM image of the ZnO film.
