First, the feasibility of a single G-CAPode was tested by applying different frequencies (Vin = 0 ± 0.1 V) from 10 mHz to 10 kHz at different gate Ubias from 1 to -1 V and tracking the corresponding phase shift (Figure ) as well as the magnitude of the impedance |𝑍| from the corresponding a Bode plot (Figure ). It can be clearly seen that the phase shift as well as |𝑍| (resistance to alternating voltage) differs depending on the applied Ubias especially in the range from 0.1 to 500 Hz due to the influence of different capacitances of the G-CAPode depending on the gate Ubias. Above 1 kHz different processes inside the G-CAPode, mainly ohmic resistances of the system like bulk electrolyte and contact resistances, are tracked which are bias-independent. The biggest differences of the phase shift over a wide frequency range can be observed for the biases Ubias = +1 and -0.75 or -1 V (Figure ). Here, the maximum phase shift occurs at 6.31 Hz. According to the results, these Ubias were selected for all further studies. Furthermore, the current responses of the W-Cap over several cycles were analyzed by applying voltages alternating from 0 ± 0.1 V with simultaneously applying a positive Ubias (0.75 V) and a negative Ubias (-1 V) to the gate (Figure ). In the charging direction high current responses can be achieved (high capacitance) while in the blocking direction only a very limited current response (low capacitance) is observed. This behavior is stable over several cycles. The capacitances achievable in the open state (-1 V gate Ubias applied) reach 0.814 mF, while only 0.136 mF can be reached when a positive Ubias of 0.75 V is applied. According to Equation , this corresponds to a theoretical fC,-,calc = 196 Hz for the negative and fC,+,calc = 1166 Hz for the positive Ubias direction.