Fig. 3. a) Equivalent circuit model R(RQ) for AuNPs- and PEDOT-electroplated tetrodes. Rs is the solution resistance, Rt is a charge transfer resistance from the electrodeposited materials. CPE is the constant phase angle element. b) Fitting EIS data and experimental EIS data of AuNPs-coated tetrode; c) Fitting EIS data and experimental EIS data of the PEDOT-coated tetrodes. These fitting results were matched with the experimental results well (Modulab).
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