R. Mlika et al., Cu2+-ISFET type microsensors based on thermally evaporated p-tert-butylcalix[9 and 11]arene thin films, SENS ACTU-B, 62(1), 2000, pp. 8-12
Large size odd-numbered calixarenes were used for the first time as ionopho
ric agents for the functionalization of ISFET microsensors and EIS structur
es through thermal evaporation process. Both calixarenes have shown a nerns
tian sensitivity over three decades towards only copper (II) activities. Ve
ry low selectivity coefficients were observed for K+ and Ca2+ whereas Cd2and Pb2+ (less than 10(-3)) can be considered as interfering ions. Lifetime
of around three months for the microsensors were obtained. (C) 2000 Elsevi
er Science S.A. All rights reserved.