Nanoporous Double-Gyroid Structure from ABC Triblock Terpolymer Thick Films

Figure 2

(a) AFM topographic image and (b) its associated Delaunay showing the top surface of a NIPS-made PS-b-P2VP-b-PEO/PS-b-PEO thick film. The dark (P2VP/PEO) pores are arranged into a short-range ordered hexagonal array with a period of ~40.1 nm. In the Delaunay triangulation, the small dots are six-fold coordinated pores, while the black and white big dots, indicating defect sites, are five- and sevenfold coordinated (P2VP/PEO) domains, respectively. The colormap shows the orientations of small grains (-30°–30°). Scale bars: 250 nm.

(a)

(b)