Simple REFET for pH detection in differential mode

A. Errachid; J. Bausells; N. Jaffrezic-Renault

doi:10.1016/S0925-4005(99)00242-7

Simple REFET for pH detection in differential mode

A. Errachid, J. Bausells, N. Jaffrezic-Renault

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54 Citations (Scopus)

Abstract

A simple reference field-effect transistor (REFET) for pH detection in differential mode measurements is described. The device is based on a pH-insensitive polymeric PVC membrane cast on the gate insulator of an ion-sensitive field-effect transistor (ISFET) device, that has been previously silylated. The REFET shows low pH sensitivity (1.8 mV/pH) and is only slightly affected by the concentration of Na+ and K+. The pH response of a combined solid-state device consisting on a pH ISFET (of 45 mV/pH sensitivity), the REFET and a quasi-reference electrode (QRE) (Pt) is 43.7 mV/pH from pH 2 to 9.

Original language	English
Pages (from-to)	43-48
Journal	Sensors and Actuators, B: Chemical
Volume	60
Issue number	1
DOIs	https://doi.org/10.1016/S0925-4005(99)00242-7
Publication status	Published - 2 Nov 1999

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abstract = "A simple reference field-effect transistor (REFET) for pH detection in differential mode measurements is described. The device is based on a pH-insensitive polymeric PVC membrane cast on the gate insulator of an ion-sensitive field-effect transistor (ISFET) device, that has been previously silylated. The REFET shows low pH sensitivity (1.8 mV/pH) and is only slightly affected by the concentration of Na+ and K+. The pH response of a combined solid-state device consisting on a pH ISFET (of 45 mV/pH sensitivity), the REFET and a quasi-reference electrode (QRE) (Pt) is 43.7 mV/pH from pH 2 to 9.",

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AB - A simple reference field-effect transistor (REFET) for pH detection in differential mode measurements is described. The device is based on a pH-insensitive polymeric PVC membrane cast on the gate insulator of an ion-sensitive field-effect transistor (ISFET) device, that has been previously silylated. The REFET shows low pH sensitivity (1.8 mV/pH) and is only slightly affected by the concentration of Na+ and K+. The pH response of a combined solid-state device consisting on a pH ISFET (of 45 mV/pH sensitivity), the REFET and a quasi-reference electrode (QRE) (Pt) is 43.7 mV/pH from pH 2 to 9.

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