Our group investigated the self-assembly behavior block copolymers, P(St-Fln)-b-P2VP, in which one block is a coiled P2VP, while the other block is a stretched, semiflexible PS chain bearing a mesogen of one or two fluorene units [28]. Depending on the number of pendant fluorene units, the block volume ratio, the processing solvent, and thermal annealing history, spherical, hexagonally packed cylinders, lamellar, gyroidal, and hexagonally perforated lamellae were obtained ( Fig. 26). The capability of P(St-F1n)-b-P2VP to host COOH-modified SWCNTs arises through the hydrogen bonding between the COOH and P2VP moieties. The capability to encapsulate SWCNT was also found to be directly dependent on the microphase-separated structure of the block copolymers: two-dimensional (lamellae) structure being more efficient than one-dimensional morphology (cylinders) ( Fig. 27).