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Open AccessArticle

Detection of Organophosphorous Chemical Agents with CuO-Nanorod-Modified Microcantilevers

1
Nanomatériaux pour les Systèmes Sous Sollicitations Extrêmes (NS3E), UMR 3208 ISL/CNRS/UNISTRA, French-German Research Institute of Saint-Louis, 5, rue du Général Cassagnou, 68300 Saint-Louis, France
2
Institut Jean Lamour, CNRS - Université de Lorraine, UMR 7198, Campus Artem, Allée André Guinier, 54011 Nancy, France
3
Institute of Chemistry and Processes for Energy Environment and Health (ICPEES), UMR 7515 CNRS-University of Strasbourg, 67087 Strasbourg, France
4
French-German Research Institute of Saint-Louis, 5, rue du Général Cassagnou, 68300 Saint Louis, France
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Sensors 2020, 20(4), 1061; https://doi.org/10.3390/s20041061 (registering DOI)
Received: 24 January 2020 / Revised: 12 February 2020 / Accepted: 13 February 2020 / Published: 15 February 2020
(This article belongs to the Special Issue Metal Oxide Based Sensors)
Microcantilevers are really promising sensitive sensors despite their small surface. In order to increase this surface and consequently their sensitivity, we nanostructured them with copper oxide (CuO) nanorods. The synthesis of the nanostructure consists of the oxidation of a copper layer deposited beforehand on the surface of the sample. The oxidation is performed in an alkaline solution containing a mixture of Na(OH) and (NH4)2S2O8. The synthesis procedure was first optimized on a silicon wafer, then transferred to optical cantilever-based sensors. This transfer requires specific synthesis modifications in order to cover all the cantilever with nanorods. A masking procedure was specially developed and the copper layer deposition was also optimized. These nanostructured cantilevers were engineered in order to detect vapors of organophosphorous chemical warfare agents (CWA). The nanostructured microcantilevers were exposed to various concentration of dimethyl methylphosphonate (DMMP) which is a well-known simulant of sarin (GB). The detection measurements showed that copper oxide is able to detect DMMP via hydrogen interactions. The results showed also that the increase of the microcantilever surface with the nanostructures improves the sensors efficiency. The evolution of the detection performances of the CuO nanostructured cantilevers with the DMMP concentration was also evaluated.
Keywords: microcantilevers; sensors; nanostructured sensors; CuO/Cu(OH)2 nanorods; DMMP detection; organophosphorous; selective detection microcantilevers; sensors; nanostructured sensors; CuO/Cu(OH)2 nanorods; DMMP detection; organophosphorous; selective detection
MDPI and ACS Style

Schlur, L.; Agostini, P.; Thomas, G.; Gerer, G.; Grau, J.; Spitzer, D. Detection of Organophosphorous Chemical Agents with CuO-Nanorod-Modified Microcantilevers. Sensors 2020, 20, 1061.

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