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| Type |
Poster Presentation |
| Area |
Electrochemistry |
| Room No. |
Grand Ballroom |
| Time |
10월 19일 (금요일) 11:00~12:30 |
| Code |
ELEC.P-493 |
| Subject |
Fabrication of an Amperometric Microsensor for Measurements of Hydrogen Sulfide and Oxygen |
| Authors |
Subin Park, Youngmi Lee*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
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| Abstract |
Oxygen (O2) is the one of the most essential molecules for living organisms. Its supply to a brain through blood flow is regulated carefully by vasodilation and vasoconstriction. Hydrogen sulfide (H2S) is known to be an important gasotransmitter molecule in the brain, mediating many biological processes including vasodilation. The close interacting dynamics of O2 and H2S is an interesting subject to better understand the biological roles of these molecules.
In this presentation, we demonstrate the development of an amperometric H2S/O2 dual microsensor, which makes it possible to monitor real-time in vivo changes in the levels of H2S and O2 simultaneously. First, we fabricate a dual electrode having two Pt microdisks of which diameters are 50 μm and 25 μm, respectively. Both Pt micro-disks are electrochemically etched to form recessed micropores, and each micropore is filled with different porous metallic layers through electrodeposition. Then, the electrode surface for H2S sensing is modified with electropolymerized polymer, while the electrode surface for O2 sensing is silanized with a gas permeable membrane. The analytical performances of the developed dual sensor are investigated in terms of the sensitivity and selectivity. This highly sensitive and selective dual sensor is enough to be applied in biological environments. 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).
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| E-mail |
sbpark618@gmail.com |
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122nd General Meeting of the KCS