Title :
A Low-Cost Disposable Chemical Sensing Platform Based on Discrete Components
Author :
Prodromakis, Themistoklis ; Liu, Yan ; Toumazou, Chris
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London, UK
fDate :
3/1/2011 12:00:00 AM
Abstract :
A method of fabricating low-cost chemical sensing platforms is presented. The device utilizes a discrete metal-oxide-semiconductor field-effect transistor to detect ionic concentrations in electrolytes, with particular emphasis to pH. Measured results indicate a chemical sensitivity of 36.5 mV/pH, while the device exhibits low-leakage currents (in picoamperes) and a drift of 9 mV/h. The proposed technique has a great potential for disposable implementations, while the sensing selectivity of the device can be easily altered, resulting into a versatile platform.
Keywords :
MOSFET; chemical sensors; electrolytes; ion sensitive field effect transistors; leakage currents; chemical sensitivity; discrete metal-oxide-semiconductor field effect transistor; electrolyte; ionic concentration detection; low-cost disposable chemical sensing; low-leakage current; Chemical sensor; discrete ion-sensitive field-effect transistor (ISFET); extended gate;
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2010.2099098
