Influence of Lanthanum Oxycarbonate Deposition on Carbon Dioxide Detection

Abstract

Lanthanum oxycarbonate films have been deposited by drop coating and screen printing for carbon dioxide detection. The measurements are based on a change in resistance and provide sensitive responses to carbon dioxide concentrations in a humid environment. Electrical measurements were made at 5 000 ppm of carbon dioxide in synthetic air. The relative humidity was maintained at 50%. Our results highlighted the close link between the morphology of the sensitive elements and the electrical responses of the sensors, and thus the need to master the deposition technique.