P2GS.15 - Highly Sensitive Acetylene Sensing Properties of Al- and In-doped ZnO Quantum Dots
- 17th International Meeting on Chemical Sensors - IMCS 2018
2018-07-15 - 2018-07-19
- P-2 - Gas Sensors
- M. Park, R. Yoo, B. Jang, Y. Park, M. Kim, H. Lee, W. Lee - Department of Materials Science and Engineering, Yonsei University, Seoul (Republic of Korea)
- 796 - 797
Acetylene (C2H2), dissolved in oil-filled power equipment, has undoubtedly the most detrimental risk in terms of safety owing to the arc discharge characteristics. It is necessary to systematically detect the dissolved acetylene gas for optimum operation condition which can directly affect the safety and stability of the power system. In this vein, we report the high-performance C2H2 gas sensor based on 1 at% In-doped ZnO quantum dots (QDs) which was synthesized by a hydrothermal method. The phase and morphology of the as-synthesized QDs were characterized by X-ray diffraction (XRD) and transmission electron microscope (TEM) analyses. The sensing properties of the C2H2 gas were carried out by exposing the sensor to various concentration under the various working temperatures. The response to the 10 ppm acetylene was ~314 in air and ~570 in N2 at the optimum operating temperature, which are superior to that of other previously reported C2H2 sensors based on semiconducting metal oxides.