Fig. 7

Illustrates the extracted impedance between two different sizes of microbeads as a function of frequency. A shows the response of the first configuration without an insulation layer. B illustrates the response of the first configuration of interdigitated microelectrodes (X1). C illustrates the response of the X2 configuration, and D illustrates the response of the X3 configuration. The insets display a specific frequency region from \({10}^{5}:{10}^{6}\) for each signal