pH and Procaine Sensing Characteristics of Extended-Gate Field-Effect Transistor Based on Indium Tin Oxide Glass
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概要
- 論文の詳細を見る
The pH sensing properties of an extended-gate field-effect transistor (EGFET) based on indium tin oxide (ITO) glass are investigated in this study. The separating structures in the EGFET are examined using a current–voltage measurement system to measure $I$–$V$ curves. A readout circuit is applied to measure the pH sensing EGFET output voltage, and nonideal factors (drift and hysteresis effects) are monitored in different buffer solutions ($\text{pH}=1--11$). It was found that separating structures for ITO glass sensors have a high pH sensitivity ($\sim 55$ mV/pH), a low drift rate and a small hysteresis width in the concentration range between $\text{pH}=1$ and 11 in buffer solutions. The EGFET was used in fabricating a drug-sensitive field-effect transistor (DrugFET) sensor for procaine hydrochloride. The DrugFET was prepared using a combination of the EGFET and a drug-sensitive membrane that measured the procaine concentration in the $1\times 10^{-2}$–$1\times 10^{-6}$ mol/L range. The separating structure was used with a procaine DrugFET with a good response (${\sim}200$ s) at room temperature.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-07-15
著者
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Chiang Jung-lung
Department Of Electronic Engineering Chung Chou Institute Of Technology
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CHOU Jung-Chuan
Graduate School of Electronic Engineering, National Yunlin University of Science and Technology
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Wu Chin-Lung
Graduate School of Electronic Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, Taiwan 640, R.O.C.
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Chiang Jung-Lung
Department of Electronic Engineering, Chung Chou Institute of Technology, Yuanlin, Changhua, Taiwan 510, R.O.C.
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Chou Jung-Chuan
Graduate School of Electronic Engineering, National Yunlin University of Science and Technology, Douliu, Yunlin, Taiwan 640, R.O.C.
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Chiang Jung-Lung
Department of Electrical Engineering, National Sun Yat-Sen University
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