Manganese Oxide Nanoarchitectures as Chemoresistive Gas Sensors to Monitor Fruit Ripening.

Author(s) Bigiani, L.; Zappa, D.; Comini, E.; Maccato, C.; Gasparotto, A.; Barreca, D.
Journal J Nanosci Nanotechnol
Date Published 2020 May 01

The efficient detection of low-concentration ethylene is a challenging issue of key importance for food quality control end-uses. Herein, we report on the fabrication of MnO₂-based nanoarchitectures by a two-step plasma-assisted process, consisting in the initial chemical vapor deposition of MnO₂ () on polycrystalline Al₂O₃ substrates and the subsequent functionalization with Ag and Au-based nanoparticles () by sputtering processes. The resulting composites, characterized by a high Ag/Au dispersion and an effective contact, were tested for the first time as chemoresistive gas sensors for ethylene recognition at low temperatures. The high sensitivity and promising responses, enhanced by metal particle introduction, candidate the target systems as attractive platforms for the eventual monitoring of vegetables/fruits ripening and ageing.

DOI 10.1166/jnn.2020.17479
ISSN 1533-4899
Citation J Nanosci Nanotechnol. 2020;20(5):30253030.

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