산화물 반도체형 가스센서와 4차 산업혁명
Oxide Semiconductor Gas Sensors for the 4th Industrial Revolution
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이종흔 고려대학교 Oxide semiconductor chemiresistors have been widely used to detect harmful, explosive, and toxic gases and their applications are rapidly expanding to air quality monitoring, evaluation of food/fish freshness, and medical diagnosis with the progress of the 4th industrial revolution. Because most of target analyte gases consist of multiple chemical quantities, artificial olfaction is often required for discriminative gas detection. An array of sensors to show different gas sensing patterns to various chemical quantities as well as machine learning algorithm are essential to mimic or overcome human olfaction. Although oxide semiconductor chemiresistors are advantageous for integration into a tiny sensor array with low power consumption, their gas sensing libraries are still insufficient to cover a wide range of different single/complex chemicals and to realize a variety of new applications in the near future. In this talk, several new strategies to design highly sensitive, selective, and discriminative oxide semiconductor gas sensors will be suggested and their impacts on the evolution of chemical sensing will be discussed in relation to the 4th industrial revolution. |