Planar interdigitated electrode array

A pH sensor, based on a.c. conductivity measurements of a thin polymer film, has been developed. The sensor consists of a planar interdigitated electrode array coated with a polypyrrole multilayer, built-up using the Langmuir-Blodgett technique. Impedance spectroscopy has been used to investigate the complex admittance of the device when exposed to aqueous solutions of different pH. The experimental data have been fitted to the theoretical response of an equivalent electrical network of capacitors and resistors. A response over the pH range 3.5 to 8 has been measured. 

Ki-Ho Han et at (2009) Lateral displacement as a function of particle size using a piecewise curved planar interdigitated electrode array. Lab Chip, 2009,9, 2958-2964 DOI 10.1039/b909753h... 

Another popular and widely used example of practical two-electrode symmetrical cells is a planar interdigitated electrode (Figure 8-6). Such arrays have become prominent as miniaturized sensors, transducers, and actuators. T)q)i-cally these structures are comjrosed of two symmetrical comb-shaped low micrometer-sized interdigitated metallic electrodes prepared on nonconductive... 

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