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제116회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Amperometric Dual Microsensor for Simultaneous Measurements of Glucose and Oxygen

등록일
2015년 9월 2일 13시 55분 33초
접수번호
1142
발표코드
ELEC.P-549 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 16일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
박근아, 이종목1, 이영미1,*
이화여자대학교 화학나노과학, Korea
1이화여자대학교 화학나노과학과, Korea
Glucose is primary energy source of physiological metabolism and oxygen (O2) is also consumed in this process. Therefore, real-time simultaneous detection of these materials in vitro/vivo is valuable in medical and biological sciences. In this study, we demonstrate the development of an amperometric glucose/O2 dual microsensor which can measure these materials simultaneously, and the analytical performances of this dual sensor, such as selectivity, sensitivity, response time, are characterized. The sensor is made of dual platinum (Pt) disk working electrodes (each dia. = 25 μm), SCE as the reference electrode, and Pt wire as the counter electrode. The dual working electrode is fabricated using simple Pt microwire and etched/sharp Pt microwire. Both Pt microdisks are electrochemically etched to form a recessed micropore for O2 sensing and a truncated cone-shaped micropore for glucose sensing. Both micropores are filled with porous Pt layers via electrodeposition of Pt from Pt precursor solution. The surface of O2 sensing electrode is silanized for selectivity to O2. On the other hand, the truncated cone-shaped Pt electrode is used as a non-enzymatic glucose sensor to measure the glucose levels with high spatial and temporal resolution. This unique tapered pore shaped structure provides sufficient selectivity to glucose over typical interfering species such as AA and AP without any additional membrane. The sensitivity and selectivity of the dual sensor show the feasibility and suitability for the biological applications. 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 (2014R1A2A2A05003769).

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