Study on Inorganic Film Taste Sensor for Hot Drink Evaluation

Abstract

We aimed to develop taste sensor for evaluating hot drinks using several metal oxide films (ZnO, SnO₂, WO₃ and In₂O₃) as a sensing film. The films were formed using Pulse Laser Deposition method on Pt/Ag electrode. We measured the sensor responses for saltiness (NaCl), sweetness (Glucose), and mixed solution of saltiness and sweetness at 60 degrees. We observed the different responses from each sensing film. In these results, all developed sensors responded depending on saltiness concentration and the response value differed by kind of sensing films. On the other hand, it was shown that sensors can detect high concentration sweetness. These results suggest that our developed sensor have a capability to detect taste components and taste interaction in hot drinks.