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  • 09월 10일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제124회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Fabrication of an Amperometric Microsensor for Simultaneous Measurement of Nitric Oxide, Carbon Monoxide and Hydrogen Sulfide

2019년 8월 19일 16시 08분 25초
ELEC.P-401 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 17일 (목요일) 11:00~12:30
저자 및
Sunghwa Seo, Youngmi Lee*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
Nitric oxide (NO), carbon monoxide (CO) and hydrogen sulfide (H2S) are well known as endogenous neurotransmitters in mammalian cells. However, there are still controversy in the way that they are related one to another when they transmit the neuronal signals in brain. Therefore, a triple sensor is developed to establish their functional relations through the simultaneous measurements of these three gases in biological environments. In this presentation, we demonstrate the fabrication of an amperometric microsensor for the concurrent measurement of NO, CO and H2S. This sensor has three platinum (Pt) working electrodes: 50, 76 and 50-μm diameter Pt microdisks (denoted as WE 1, 2 and 3, respectively) in a three-barrel glass capillary. WE 1 has a bare Pt disk and covered with NO selective membrane. Both WE 2 and 3 are electrodeposited with different metal nanoparticles after Pt disks are etched electrochemically. Then, the surface of WE 2 is loaded with CO selective membrane. And, WE 3 is coated with an electropolymerized film. Finally, this sensor is characterized in terms of the sensitivity by measuring the currents at WE 1, 2 and 3 responsive to NO, CO and H2S concentration increases at each optimized applied potential. The selectivity of the sensor for the individual targeted gases over common biological interfering species are also confirmed. The feasibility of the prepared NO/CO/H2S triple sensor to distinguish three gases in biological environments is also studied aiming at determining the relationship of them in biological systems. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT& Future Planning (NRF-2017R1A2A2A14001137).