Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Light addressable potentiometric penicillin sensor using Ta2O5 sensing membrane

Ta2O5 감지막의 광지시 전위차형 페니실린 센서

  • Lee, Sun-Young (Department of Electronic Engineering, Kyungpook National University) ;
  • Jang, Su-Won (Department of Electronic Engineering, Kyungpook National University) ;
  • Kim, Jae-Ho (Department of Molecular Science and Technology, Ajou University) ;
  • Kwon, Dae-Hyuk (Department of Electronic and Information Engineering, Kyungil University) ;
  • Kim, Eung-Soo (Division of Digital and Information Engineering, Pusan University of Foreign Studies) ;
  • Kang, Shin-Won (School of Electrical Engineering and Computer Science, Kyungpook National University)
  • 이선영 (경북대학교 대학원 전자공학과) ;
  • 장수원 (경북대학교 대학원 전자공학과) ;
  • 김재호 (아주대학교 분자과학기술학과) ;
  • 권대혁 (경일대학교 전자정보통신공학부) ;
  • 김응수 (부산외국어대학교 디지털정보공학부) ;
  • 강신원 (경북대학교 전자전기컴퓨터학부)
  • Published : 2006.05.31
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Abstract

In this study, the light addressable potentiometric sensors (LAPS) with $Si_{3}N_{4}/SiO_{2}/Si$, and $Ta_{2}O_{5}/SiO_{2}/Si$ structures were fabricated. The penicillinsae was immobilized on the devices to hydrolyze the penicillin using self-assembled monolayer (SAM) method. Then response characteristics according to the penicillin concentrations were measured and compared. The measuring system was simplified by using LabVIEW. The pH response characteristics of fabricated devices are 56 mV/pH ($Si_{3}N_{4}$ sensing membrane) and 61 mV/pH ($Ta_{2}O_{5}$ sensing membrane). The sensitivity of sensor by enzyme reaction result of the enzyme reaction were 60 mV/decade and 74 mV/decade for $Si_{3}N_{4}/SiO_{2}/Si$ and $Ta_{2}O_{5}/SiO_{2}/Si$ structure, respectively, in the range of $0.1\;mM{\sim}10\;mM $of the penicillin concentration.

Keywords

References

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