An atmospheric oxidation monitor based on in situ thin-film deposition

Quinn, Richard C.; Zent, Aaron P.; Garry, James R. C.; Ringrose, Timothy J.; Towner, Martin C. and Grunthaner, Frank J. (2006). An atmospheric oxidation monitor based on in situ thin-film deposition. Sensors and Actuators B: Chemical, 114(2) pp. 841–848.



We describe an atmospheric oxidation sensor developed and delivered as part of the European Space Agency (ESA) Beagle 2 (B2) Mars Lander Environmental Sensor Suite (ESS). The sensor monitors atmospheric oxidation rates by measuring resistance changes in a thin-silver (Ag) film deposited in situ onto a sapphire substrate while on the surface of Mars. Potential terrestrial applications of this sensing approach include long-term monitoring of oxidative contaminants in low-oxygen systems including process gases and environmental chambers. The sensor response to ppb levels of hydrogen peroxide (H2O2) vapor in carbon dioxide (CO2) is demonstrated.

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