Hi, I am thinking of using a parallel plate capacitor to measure the growth of proteins/cells on one of the plates i.e. the electrodes. Will the sensitivity be largely limited by the gap between the two electrodes ? How will the surface area affect the capacitance change when the target is attached to the electrode ? I did some literature review but could not see any specific discussion on the dimensions of the device. I understand that based on the basic theory of parallel plate capacitors, the capacitance should increase as the gap decreases and its also proportional to area of the plate. But how does all this tie into a biosensor application ?
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