Kyoung Ho Han1, In Seong Shin2, and Do-Young Yoon1*한경호1·신인성2·윤도영1*
1Department of Chemical Engineering, Kwangwoon University, Seoul 01897, Korea
2G&G InTech Co. Ltd., Central R&D Center, Gyeonggi-do 16950, Korea1광운대학교 공과대학 화학공학과
2지앤지인텍 중앙연구개발센터
In this study, the development of biosensors capable of bi-enzyme reactions by
including Horseradish peroxidase and glucose oxidase was carried out for detection of glucose.
The sensors were manufactured using electro deposition method to reduce production time, and
screen printed electrodes (SPE) were used to produce economical sensors. To check the bienzyme
effect, the sensor was compared and analyzed with single enzyme biosensor. The characteristics
of the sensor were evaluated using scanning electron microscopy(SEM), cyclic voltammetry(
CV), electrochemical impedance spectroscopy(EIS), chronoamperometry(CA), and
flow injection analysis(FIA). Analysis results from SEM, CV and EIS confirmed that the
enzymes are well fixed to the electrode surface. In addition, it was confirmed that bi-enzyme
biosensors manufactured from the CA method improved signal performance by 200% compared to single enzyme biosensors. From this results, we were able to explain that HRP and GOD
react catalyzed to each other. And the results of FIA showed that the intensity of each current
signal was constant when the same concentration of glucose was injected four times. In addition,
by analyzing the intensity of current signals for glucose concentrations, the biosensors manufactured
in this study showed excellent trends in signal sensitivity, reproducibility and stability.
Keyword : Bi-enzyme, Screen printed electrode, Glucose detection, Horseradish peroxidase, Glucose
oxidase, Electro deposition