Another synthesis of coil–rod–coil block copolymers, constituting a central conjugated segment based on 3,4-ethylenedioxythiophene and dihexylfluorene units (BEDOT-HF) with flexible PEO chains, has been reported [107]. As expected, the self-assembled morphologies depended on the volume fraction of each block. For the case of the short conjugated rod block, the spherical and cylinders micelles (J-aggregates) were observed depending on the solution concentration, whereas the system having longer conjugated block tended to generate vesicular organizations (H-aggregates) (Fig. 13).