For my research on inkjet-printable electrodes, I want to compare the capacitance/impedance of a parallel-plate capacitor with a planar interdigitated capacitor.
In order to verify my simulation results, I additionally want to calculate the capacitance/impedance of the interdigitated electrodes analytically, dependent on geometry and material properties.
Can somebody provide some formulas and/or respective source where I can find how to calculate such a structure?
Perhaps you should have a look at
"Approximate expression for the capacitance and electrostatic potential of intedigtated electrodes" by Matthijs W. den Otter
February 2002
Sensors and Actuators A Physical 96(2-3):140-144
DOI: 10.1016/S0924-4247(01)00783-X
Are you comparing a parallel plate electrochemical capacitor to an interdigitated one of the same materials/chemistry? In that case, you probably already know to use EIS to quantify capacitance using an equiv. circuit model. However, the geometry will give you substantial differences because of edge effects. Each corner of the interdigitated electrodes will cause a distortion of the stored field, so if you're looking for solutions in lit, try searching the term "edge effects".
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