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Manganese Oxide Nanoarchitectures as Chemoresistive Gas Sensors to Monitor Fruit Ripening

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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 (host) on polycrystalline Al2O3 substrates and the subsequent functionalization with Ag and Au-based nanoparticles (guest) by sputtering processes. The resulting composites, characterized by a high Ag/Au dispersion and an effective host-guest 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.
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Keywords: Ethylene; Gas Sensors; MnO2; Nanoarchitectonics; Plasma Enhanced-Chemical Vapor Deposition

Document Type: Research Article

Affiliations: 1: Department of Chemical Sciences, Padova University and National Interuniversity Consortium of Materials Science and Technology (INSTM), 35131 Padova, Italy 2: Sensor Lab, Department of Information Engineering, Brescia University, 25133 Brescia, Italy 3: National Research Council-Institute of Condensed Matter Chemistry and Technologies for Energy (CNR-ICMATE) and National Interuniversity Consortium of Materials Science and Technology (INSTM), Department of Chemical Sciences, Padova University, 35131 Padova, Italy

Publication date: May 1, 2020

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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