title: Selective response inversion to NO₂ and acetic acid in ZnO and CdS nanocomposite gas sensor.
abstract: High sensitivity zinc oxide (ZnO) tetrapods (TPs) have been functionalized by nucleating cadmium sulphide (CdS) nanoparticles (NPs) directly on their surface with a spotted coverage thanks to an optimized synthesis in dimethylformamide (DMF). The obtained hybrid coupled material has been used to realize a gas sensing device with a highly porous nanostructured network, in which the proper alternation of ZnO-TPs and CdS-NPs gives rise to unconventional chemoresistive behaviours. Among the different tested gases and vapours, the sensor showed a unique fingerprint response-inversion between 300 °C and 400 °C only for nitrogen dioxide (NO2) and acetic acid (CH3COOH).
authors.affiliation: IMEM-CNR, Parco Area delle Scienze 37/A, Parma-43124, Italy.
authors.forename: D
authors.initials: D
authors.lastname: Calestani
authors.forename: M
authors.initials: M
authors.lastname: Villani
authors.forename: R
authors.initials: R
authors.lastname: Mosca
authors.forename: L
authors.initials: L
authors.lastname: Lazzarini
authors.forename: N
authors.initials: N
authors.lastname: Coppedè
authors.forename: S C
authors.initials: SC
authors.lastname: Dhanabalan
authors.forename: A
authors.initials: A
authors.lastname: Zappettini