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Vol. 34, No. 8(3), S&M3042

Notice of retraction
Vol. 32, No. 8(2), S&M2292

Print: ISSN 0914-4935
Online: ISSN 2435-0869
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
Sensors and Materials
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Sensors and Materials, Volume 18, Number 3 (2006)
Copyright(C) MYU K.K.
pp. 115-124
S&M635 Research Paper of Special Issue
Published: 2006

High-Sensitivity Membranes of Light Addressable Potentiometric Sensor for Penicillin Detection [PDF]

Su Won Jang, Su Young Lee, Heng Yuan, Do Eok Kim, Dae Hyuk Kwon and Shin Won Kang

(Received February 27, 2006; Accepted April 24, 2006)

Keywords: LAPS, Ta2O5, penicillin, LabVIEW

In this study, light addressable potentiometric sensors (LAPSs) that have devices with Si3N4/SiO2/Si and Ta2O5/SiO2/Si structures were fabricated. We investigated the response characteristics of penicillin and evaluated the possibile application to a bioimage sensor using the fabricated LAPSs. Penicillinase was immobilized on the devices to hydrolyze the penicillin using the self-assembled monolayer (SAM) method. Then, the response characteristics according to the concentration of the penicillin were measured and compared. The measuring system made up of parts such as a potentiostat, signal processing parts, and an xyz stage controlling part was simplified using LabVIEW. As a result of the enzyme reaction, the sensitivity of the sensor that has a Si3N4 surface was 60 mV/decade and 74 mV/decade which has a Ta2O5 surface in the penicillin concentration range of 0.1–10 mM. Also, we could obtain an image of with a resolution of 128 × 128 pixels within a 1 × 1 cm sensing area.

Corresponding author: Shin Won Kang


Cite this article
Su Won Jang, Su Young Lee, Heng Yuan, Do Eok Kim, Dae Hyuk Kwon and Shin Won Kang, High-Sensitivity Membranes of Light Addressable Potentiometric Sensor for Penicillin Detection, Sens. Mater., Vol. 18, No. 3, 2006, p. 115-124.



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