Title
Highly sensitive palladium oxide thin film extended gate FETs as pH sensor
Abbreviated Journal Title
Sens. Actuator B-Chem.
Keywords
EGFET; Palladium oxide; pH sensor; Super-Nernstian sensitivity; FIELD-EFFECT TRANSISTOR; IRIDIUM OXIDE; ISFET; HYSTERESIS; SURFACE; DRIFT; FABRICATION; ELECTRODE; DIOXIDE; SYSTEM; Chemistry, Analytical; Electrochemistry; Instruments & Instrumentation
Abstract
It is well-known that palladium readily absorbs hydrogen gas at room temperature. Based on this unique property of palladium, palladium oxide (PdO)-sensitive membrane in the extended gate field-effect transistor (EGFET) configurations have been evaluated as a detector for hydrogen ions in pH buffer solutions. The PdO thin film was prepared by a two-step process through reactive electron beam evaporation and subsequent thermal oxidation in an optimal O-2 flow. Our results indicate that the PdO-based EGFET sensor showed super-Nernstian sensitivity approximately 62.87 mV/pH, while exhibiting good linearity as well as good stability between pH 2 and pH 12. Our research demonstrates that PdO membrane can be used in EGFET structure without compromising sensitivity achieved by conventional methods. Furthermore, the disposable PdO sensor shows great potential for low cost biochemical detection due to its simplified fabrication and measurement system. (C) 2014 Elsevier B.V. All rights reserved.
Journal Title
Sensors and Actuators B-Chemical
Volume
205
Publication Date
1-1-2014
Document Type
Article
Language
English
First Page
199
Last Page
205
WOS Identifier
ISSN
0925-4005
Recommended Citation
"Highly sensitive palladium oxide thin film extended gate FETs as pH sensor" (2014). Faculty Bibliography 2010s. 5226.
https://stars.library.ucf.edu/facultybib2010/5226
Comments
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