3.2. Solution micelles
The micellar structures of block copolymers in solution are generally driven by the one or more parameters including the copolymer composition, selective solvent concentration, the presence of additives, the nature of common solvent, pH, and temperature, etc. Segalman and coworkers presented a comprehensive review [15] on the solution morphology of conjugated rod–coil block copolymers, classified into two categories of rod-selective solvent and coil-selective solvent systems (Fig. 6). In the case of the rod-selective solvent, the rods pack on the shell of the assemble morphologies vesicles with different coil fractions, such as spherical and wormlike structures, depending on the force balance of liquid crystalline penalty for the interfacial curvature and the interfacial area per coil block. In the coil-selective solvent system, the shapes may be spherical, elliptical, rod- or disk-shaped, or wormlike, due to the different packing geometries of the rod block with varying the rod fraction. These, along with other systems such as supramolecular approaches of conjugated rod–coil molecules in solution state will be also discussed here.