Metal oxide semiconductor based thin film sensor for nitro aromatic explosive detection

In this study, a proportion of zinc oxide and tin oxide nano-powder was used to fabricate gas sensor in the form of thin film gas sensor. The effect of explosive components at room temperature on the electrical conductivity, sensitivity, response time and recovery time of thin film sensor has been studied. The study revealed that the electrical conductivity of thin film changes with exposure of explosive material. The electrical conductivity of the thin film sensor gives response differently for different explosive components. Characterization of thin film sensor for response of explosive materials is done and can be useful for detection or quantification for homeland security.