Electrochemical Reference Electrode for the Ion-Selective Field Effect Transistor

Abstract

By means of the monolithic integrated circuit techniques with the plasma polymerization method, a reference field effect transistor (REFET) has been developed to be used with the ion-selective field effect transistors (ISFET’s). The gate insulator of the REFET is coated with a plasma polymerized styrene film. It was used in combination with the pH-ISFET to determine pH values. Experimental results compared favorably with those from the convetional glass electrode method.

Application of polymer-embedded proteins to fabrication of DNA array

“…The thickness of the PPF can be determined using ellipsometry. Because plasma polymers can easily modify the surface of materials, the technique has already been applied to immunosensors (Nakanishi et al, 1996), biosensors (Mara et al, 1999), chemical sensors (Thara et al, 1982), humidity sensors (Radeva and Spassov, 1998), and molecular imprinting (Shi et al, 1999).…”

Electrochemical techniques for microfluidic applications

“…The second approach uses a perm-selective membrane, such as Nafion, to confine primary potential-determining ions in the interior [28]. Ion-insensitive membranes have also been used to construct solid-state reference electrodes [29]; many examples are found in reference field effect transistors [30,31]. However, the use of ion-insensitive membranes is problematic [32,33].…”

Plasma Polymerized Films for Sensor Devices

“…The sensing elements of the ISFETs were covered by plasma-polymerized styrene and characterized [50]. A NO 2 gas sensor was fabricated using plasma polymerization of copper phthalocyanine [51].…”