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Light-addressable potentiometric penicillin image sensor using the self-assembled monolayer immobilizing method

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5 Author(s)
Su-Won Jang ; Dept. of Electron. Eng., Kyungpook Nat. Univ., Daegu, South Korea ; Sun-Young Lee ; Kwang-Man Lee ; Dae-Hyuk Kwon
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In this study, the LAPSs (light addressable potentiometric sensors) which have devices of Si3N4/SiO2/Si, Ta2O5/SiO2/Si structure were fabricated. Also, it was investigated the response characteristics to penicillin concentration and detected the 2D images of 128 × 128 pixels. The penicillinase was immobilized on the devices to hydrolyze the penicillin using self-assembled monolayer (SAM) method. The measuring system was simplified by using Lab VIEW software. The result of the enzyme reaction, the sensitivity of the sensor which has Si3N4 surfaces was 60 mV/decade and Ta2O5 surfaces was 74 mV/decade in the range of 0.1 mM ∼ 10 mM of the penicillin concentration. Image detecting time by an enzyme reaction between penicillin and penicillinase took about 10 minutes at 128 × 128 pixels in 1 × 1 cm sensing area.

Published in:

Solid-State Sensors, Actuators and Microsystems, 2005. Digest of Technical Papers. TRANSDUCERS '05. The 13th International Conference on  (Volume:2 )

Date of Conference:

5-9 June 2005

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