123rd General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2
Time 4월 18일 (목요일) 11:00~12:30
Code ELEC.P-461
Subject Fabrication of an Electrochemical Dual Microsensor for Simultaneous Monitoring of Hydrogen Sulfide and Oxygen
Authors Subin Park, Youngmi Lee1,*
Ewha Womans University, Korea
1Department of Chemistry and Nano Science, Ewha Womans University, Korea
Abstract A gasotransmitter hydrogen sulfide (H2S) is recognized as an important neuronal messenger in brain. Oxygen (O2) is vital to most living organisms and a direct indicator especially under hypoxia condition. Thus, proper tools capable of measuring both H2S and O2 at the same time would allow us to investigate the interrelated dynamics between H2S and O2 in various biological systems. In this study, the development of an amperometric microsensor for real-time simultaneous measurements of H2S and O2 is demonstrated. 50 μm Pt wire and 25 μm Pt wire are individually embedded in a theta glass capillary and compose working electrodes. The ends of both Pt wires are electrochemically etched, and each Pt micropore is filled with different metal nanoparticles via electrodeposition. Then, the H2S sensing electrode is coated with an electropolymerized thin film. On the other hand, a gas permeable membrane which gives silane modification is dispersed over the surface of the O2 sensing electrode. Each electrode is finally optimized by determining a proper potential for sensing its target gas molecule only. The analytical performances of the developed dual sensor are verified in terms of the bioavailability. 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).
E-mail sbpark618@gmail.com