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Proceedings 2017, 1(4), 399; doi:10.3390/proceedings1040399

Sensitive and Selective Ammonia Gas Sensor Based on Molecularly Modified SnO2

1
École Nationale Supérieure des Mines, SPIN-EMSE, CNRS: UMR5307, LGF, F-42023 Saint-Étienne, France
2
LMGP, Université Grenoble-Alpes, Grenoble INP-MINATEC, CS 50257, 38016 Grenoble Cedex 1, France
Presented at the Eurosensors 2017 Conference, Paris, France, 3–6 September 2017.
*
Author to whom correspondence should be addressed.
Published: 25 August 2017
Download PDF [552 KB, uploaded 26 August 2017]

Abstract

The development of selective and cheap metal oxide gas sensor at ambient temperature is still a challenging idea. In this study, SnO2 surface functionalization was performed in order to obtain sensitive and selective gas sensor operated at ambient temperature. 3-aminopropyltriethoxysilane (APTES) was used as an intermediate step, followed by functionalization with molecules having acyl chloride with different end functional groups molecules such as alkyl, acid and ester groups. Acid and ester modified sensors are sensitive to ammonia between 0.2 and 10 ppm at room temperature. However, ester modified SnO2 is more selective than acid modified sensor regarding ethanol and carbon monoxide gases.
Keywords: SnO2; molecular modification; APTES; gas sensor; sensitivity; selectivity; ammonia; ambient temperature SnO2; molecular modification; APTES; gas sensor; sensitivity; selectivity; ammonia; ambient temperature
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hijazi, M.; Stambouli, V.; Rieu, M.; Tournier, G.; Pijolat, C.; Viricelle, J.-P. Sensitive and Selective Ammonia Gas Sensor Based on Molecularly Modified SnO2. Proceedings 2017, 1, 399.

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