ISFET – TechConnect Briefs

Nano-porous poly-silicon gated ion selective field effect transistors

Zehfroosh N., Shahmohammdi M., Mohajerzadeh S., University of Tehran, IR

We report the realization of ultra high sensitivity ion-selective field effect transistors (ISFET) devices by means of a nano-porous silicon structures placed on the gate region. Thanks to the presence of a nano-porous polysilicon film [...]

A Novel, Low Power Biosensor for Real Time Monitoring of Creatinine and Urea in Peritoneal Dialysis

Premanode B., Toumazou C., Institute of Biomedical Engineering, UK

Novel biosensors, based on immobilized creatininase, creatinase and urease are developed, using ISFETs with weak inversion at pH 6-8 and 37.0oC. The ISFETs with circuitry, demonstrate a linear relationship of urea and creatinine at the [...]

Design and Modelling of Smart Sensor Dedicated for Water Pollution Monitoring

Szermer M., Daniel M., Napieralski A., Technical University of Lodz, PL

In this paper the smart sensor of chemical signal is presented. It reflects the current state of research performed in the System for European Water Monitoring (SEWING) project. The aim of the paper is to [...]

Determination of Low-Frequency Noise Spectrum in Ion-sensitive Field Effect Transistors (ISFET’s) Based on a Physical Model for Drift

Jamasb S., Collins S.D., Smith R.L., Conexant Systems, US

A physical model for drift in pH-sensitive ISFET's is employed to extract the inherent low-frequency noise power spectral density associated with these devices. The noise spectrum extracted from measured drift data demonstrates ideal 1/f noise [...]