Nanoporous Double-Gyroid Structure from ABC Triblock Terpolymer Thick Films

Figure 1

Cross-sectional SEM views of a PS-b-P2VP-b-PEO/PS-b-PEO thick film generated by NIPS showing (a) the entire material with a thickness of ~14.5 μm and the presence of a graded sponge-like substructure with small and large pores near the (b) top and (c) bottom layers, respectively. Inset: magnified SEM image of the microporous (sponge-like) substructure formed within the asymmetric terpolymer-thick film. Scale bars: 500 nm.

(a)

(b)

(c)