121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-580
Subject Development of a Triple Amperometric Microsensor for Simultaneous Measurements of Nitric Oxide, Carbon Monoxide and Hydrogen Sulfide
Authors Heeyoung Mun, Youngmi Lee*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
Abstract Nitric oxide (NO), carbon monoxide (CO) and hydrogen sulfide (H2S) are endogenously generated by enzymes in living organisms and carry out physiologically important roles as signaling molecules. These gases commonly mediate vasodilation, neurotransmission, inflammation, etc. Moreover, NO, CO and H2S are closely linked regarding their generating processes and biological roles one to another. In this research, the development of a triple amperometric microsensor for simultaneous measurements of NO, CO and H2S is demonstrated. The sensor possesses three working electrodes: 50-µm, 76-µm and 50-µm diameter platinum (Pt) disks (denoted as WE1, 2 and 3, respectively) in a triple capillary. WE1 is covered with NO selective membrane for selectivity to NO over common biological interfering species on the bare Pt disk. Both WE2 and WE3 are electrochemically etched to form recessed micropores. The micropore of WE2 is electrodeposited with porous bimetallic layers and then covered with electropolymerized polymer and CO selective membrane. The micropore of WE3 is filled with electrodeposited gold (Au) particles and the electrode surface is loaded with membrane that amplifies H2S signal. The NO/CO/H2S triple sensor is developed for simultaneous measurements of NO, CO and H2S gases and its sensitivity and selectivity showed possibility to be used for biological application. This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning (NRF-2017R1A2A2A14001137).
E-mail 1993yhm@naver.com