Gas Sensing Characteristics in ZnO Thin Film Explicated Through the Analysis of Conductance Transients and the Concept of Activation Energy

摘要

and volatile organic compounds. Selectivity, however, remains a challenge and had not been addressed for a long time. Current research involves the synthesis of ZnO thin film sensor and its use in the detection of hydrogen and carbon monoxide. Carbon monoxide shows a maximum response of 65% at 250°C and hydrogen shows a maximum response of 68% at 300°C. Both gases can be detected over a wide temperature range of 350 - 200°C and the response varies between 36 - 68% for 500 ppm H