Sol-gel법에 의한 NAS glass Na^(+)-ISFET의 제조 및 감응특성 = Preparation of NAS glass Na^(+)-ISFET by Sol-gel Method and Its Response Characterisitcs

다국어 초록 (Multilingual Abstract)

A sodium ion-sensitive field effect transistor with NAS glass as a sensing membrane has been prepared. The NAS glass was synthesized by the sol-gel method using metal alkoxides and characterized by DTA/TGA, FT-IR, and XRD analyses. Among the tested, the NAS glass with a specific mole ratio of Na_(2)O : Al_(2)O_(3) SiO_(2) = 7.9 : 14.4 : 77.7 exhibited the most significant potentiometric response toward sodium ion. The response slope and linear concentration range of the sensor measured in 0.10 M Tris-HCl buffer (pH 7.4) solution were 55 mV/pNa and 3.0 x 10^(-4) - 1.3 M, respectively. The selectivity coefficients of the sensor over hydrogen and several cations have been found to be within the required value for clinical application.