Growth and properties of ZnO nanorods by RF-sputtering for detection of toxic gases

Year: 2018

Authors: Baratto C.

Autors Affiliation: CNR INO, Via Branze 45, Brescia, Italy; Univ Brescia, Sensor Lab, Via Branze 45, Brescia, Italy.

Abstract: There is a strong demand for nanostructured materials prepared by an industrially-scalable technique. The current work is devoted to the preparation of ZnO polycrystalline nanorods using RF sputtering at 400 degrees C and Sn droplets as a catalyzer layer, for highly sensitive gas sensors. Nanorods with diameters ranging from 100 to 200 nm can be tailored by changing the RF power and the deposition time. Raman and PL spectroscopy indicate that the material obtained is ZnO, with a characteristic emission spectrum in the UV region and in the visible. The functional properties of the ZnO nanorods were investigated by studying the response to CBRN (acetonitrile and DMMP), explosive (H-2), and pollutant gases (H2S, acetone, and NO2) in the temperature range 200-500 degrees C. The sensors showed good response to reducing gases at higher temperatures (500 degrees C) and to NO2 at lower temperature (200 degrees C).

Journal/Review: RSC ADVANCES

Volume: 8 (56)      Pages from: 32038  to: 32043

More Information: The current work was supported by project NANEOS, financed by NATO SPS Programme under grant no. 9085043.
KeyWords: Nanowires; Luminescence; Nanostructures; Performance; Mechanism
DOI: 10.1039/c8ra05357j

Citations: 32
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