Electrical Characteristics of Glucose-Sensitive Diode Arrays Based on WO3 and IrO2 for Microsensor Applications

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  • Chao Shuchi
    Department of Electrophysics, National Chiao-Tung University

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  • Electrical Characteristics of Glucose-Sensitive Diode Arrays Based on WO<sub>3</sub>and IrO<sub>2</sub>for Microsensor Applications

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Abstract

Arrays based on the contacts of sputtered WO3 and IrO2 that are covered by a glucose-oxidase-containing polymer exhibit reversible and reproducible glucose-dependent, diodelike current rectification. The glucose concentration as a function of current in the forward direction can be spatially resolved. These chemical-sensitive diode arrays are useful as a basis of construction of durable microsensors for tracing the concentration gradient of biological molecules, as in food freshness sensing.

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