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Figure 2. Growth kinetics of PEDOT/alginate structures. (A) Program for electrodeposition in (i) traditional step electric potential (electrodeposition in blue), (ii) pulses of 0.5 s (blue) followed by holding at OCP (green) for 10 s, called open circuit potential interpulse (OCPI) protocol and (iii) pulses of 0.5 s (blue) followed by holding at 0 V (reduction potential, orange), called reducing potential interpulse (RPI) protocol. (B) Charge versus number of polymerisation pulses, discriminating the total oxidation charge (, black), the total reduction charge (, red) and the calculated actual electrodeposition charge (Q_{electrodeposition}, green) for the RPI protocol. (C) Kinetics of the PEDOT growth (produced using the OCPI protocol) showing zero order growth from 15 to 1000 polymerisation pulses. (D) Kinetics of the alginate hydrogel growth (produced using the OCPI protocol) showing zero order growth from 15 to 120 polymerisation pulses. (E) Photograph of the PEDOT/alginate hydrogel electrodeposited over a gold wire (13 mm length) evidencing the PEDOT (core) and alginate (shell) rich zones. (F) Growth profiles of PEDOT and alginate vs. pulse number using the OCPI protocol. Inset: Cross section scheme of the formed structure indicating the gold wire (diameter 0.1 mm), PEDOT and alginate diameters used to calculate the respective volumes.