Fig. 1From: Lead field theory provides a powerful tool for designing microelectrode array impedance measurements for biological cell detection and observationMeasured microelectrode impedance spectrum (a) and locus (b), and the corresponding equivalent circuit fit. The measurements were made from commercial microelectrodes with titanium nitride surface and a diameter of 30 µm. The equivalent circuit fit was created by using the equivalent circuit shown in Fig. 2 Back to article page