Gyroid morphology

Fig. 17 SEM image of a high molecular weight ozone-etched PS-PI sample that adopted the gyroid morphology. Reproduced from [69]...

Fig. 2.7 Schematic representation of the preparation of gyroid metallic nanofoam, a Chemical structure of the supramolecular complex PS-h-P4VP(PDP). b Bicontinuous gyroid morphology of PS-h-P4VP(PDP). c Nanoporous template after PDP was removed, d By electroless deposition, the pores between PS struts are filled with nickel, e Gyroid nickel nanofoam after the polymer template was removed by pyrolysis. Adapted with the permission from Ref. [48]. Copyright 2011 American Chemical Society...

Fig. 1.3 Strategy for nanopatteming functional materials employing templates based on copolymer self-assembly with double-gyroid morphology. This approach is particularly versatile since it separates the template fabrication top row) from the templating of functional materials bottom row). 1 Copolymer synthesis. 2 Self-assembly into the double-gyroid morphology. 3 Selective degradation of one block yields a mesoporous template. 4 Templating of functional materials via various deposition techniques. 5 Removal of polymeric matrix. 6 Assembly of functional devices...

Fig. 4.1 Preparation of mesoporous thin film polymer templates on suitable substrates, a Substrate surface modification tailoring a neutral surface, b Copolymer film deposition and phase transition to the double-gyroid morphology during thermal annealing, c Selective degradation of PLA yields the mesoporous template...

Fig. 4.4 Theoretical diblock copolymer phase diagrams for different levels of polydispersity. a An increase of the overall PDI with identical block PDIs results in a shift towards lower xA values while the phase diagram stays symmetrical (Adapted with permission from Cooke et al. [20]. Copyright 2013 American Chemical Society), b An asymmetrical increase of PDI with PD/a > PDIs shifts the phase boundaries towards decreasing xA and increasing /a values, and creates biphasic regions 2-4>. Note that the phase space of the pure gyroid morphology is even narrower for asymmetric block polydispersities (Reprinted with permission from Matsen et al. [21]. Copyright 2013 by the American Physical Society)...

---