Figure 4From: Anthraquinonyl glycoside facilitates the standardization of graphene electrodes for the impedance detection of lectinsCircuit model used to fit the Nyquist plots. R s is the solvent resistance, R f the film resistance, R ct the charge transfer resistance, CPE1 the film capacitance, CPE2 the double layer (the functional and electrolyte layer) capacitance, and W the Warburg diffusion impedance.Back to article page