Colorimetric gas sensor for ammonia vapor

Abstract

Ammonia vapor can be found in spoiling food products, and chemical plants. Detecting abnormally high concentrations of ammonia in these areas could mean an increase in the quality of food products, and safer working conditions in chemical plants. In this study, curcumin-dye based gas sensors were successfully fabricated using techniques borrowed from dye-sensitized solar cell technology. Extraction using ethanol, and doctor blade method to apply the sensing material onto a substrate were utilized. Results from the sensing experiments showed that using less curcumin dye, 2g instead of 3g, and 4g, will make for a sensor more sensitive to ammonia vapor.