TY - JOUR
T1 - Simple REFET for pH detection in differential mode
AU - Errachid, A.
AU - Bausells, J.
AU - Jaffrezic-Renault, N.
PY - 1999/11/2
Y1 - 1999/11/2
N2 - 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.
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.
U2 - 10.1016/S0925-4005(99)00242-7
DO - 10.1016/S0925-4005(99)00242-7
M3 - Article
VL - 60
SP - 43
EP - 48
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 1
ER -