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제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Spontaneous Deposition of Cobalt Oxide Nanoplates for Application to Acetone Gas Sensors

등록일
2018년 8월 30일 11시 26분 05초
접수번호
2024
발표코드
MAT.P-465 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 18일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Material Chemistry
저자 및
공동저자
Ahyeon Ma, Ki Min Nam*
Department of Chemistry, Mokpo National University, Korea
The development of sensing materials, which influence the practical gas sensing performance is critically important for the further evolution of semiconducting metal oxide gas sensor. Especially, cobalt oxides have attracted great interest in their potential applications as solid-state sensors because of their chemical stability and semiconducting properties. In this study, we are reporting the spontaneous deposition of Co3O4 nanoplates on interdigitated electrodes and its application to gas sensors. Inducing the phase transition of h-CoO to Co(OH)2 and consecutive thermal oxidation on silicon substrate results in efficient deposition between Co3O4 and the substrate without any additional deposition processes. The efficient deposition of Co3O4 nanoplates is applicable for acetone gas sensors. Gas-sensing properties of Co3O4 nanoplates were investigated using a characterization system with a temperature-controlled hot chuck in a water-cooled steel chamber. The gas response is defined as the ratio of resistance, R = Rg/Ra, where Ra and Rg are the resistance in an air and in a gas atmosphere, respectively. The real-time gas response of Co3O4 nanoplates were measured under the standard condition with the exposure of 1 ppm acetone gas at 200 °C. The Co3O4 nanoplates exhibited quite higher gas sensitivity, and better stability than previous results.

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