Title :
Super-Nernstian response of pH detection using metallic tungsten sensing electrode and extended-gate field effect transistor
Author :
Yen-Chieh Huang ; Shui-Jinn Wang
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
Summary form only given. EGFET pH sensor based on metallic W sensing electrode with stable and superior performance (65.86 mV/pH, r2=0.9972) has been demonstrated. The enhanced proton-exchange process and/or the number of H+ ions amplified by transferred electrons related to the hydrolyzation of W could be responsible for the super-Nernstian response of the proposed pH sensors. Firm understanding of the interfacial electronic reactions would be necessary for further development of W-based pH sensors.
Keywords :
chemical sensors; electrodes; field effect transistors; hydrogen; ion exchange; pH measurement; thermomagnetic effects; tungsten; EGFET pH sensor; H+; W; extended-gate field effect transistor; hydrolyzation; interfacial electronic reactions; metallic tungsten sensing electrode; pH detection; proton-exchange process; super-Nernstian response; MOSFET circuits; RNA; Transistors;
Conference_Titel :
Device Research Conference (DRC), 2015 73rd Annual
Conference_Location :
Columbus, OH
Print_ISBN :
978-1-4673-8134-5
DOI :
10.1109/DRC.2015.7175577
