Figure 4. Polymer sheets and vesicles with defined patch morphology.

Samples were prepared from acetone/isopropanol mixtures unless otherwise noted. (a) Schematic of spheres-on-cylinders that transform to cylinders-on-bilayer sheets/vesicles. (b) TEM image of cylinder-on-sheet of S₅₁₀B₅₃₉T₁₅₄ (75:25 v/v), and tomographic reconstruction of PB patches on top and bottom of the PS sheet (PB cyan, PS omitted). (c) TEM and tomographic reconstruction of a ‘lemon'-shaped vesicle of S₅₁₀B₅₃₉T₁₅₄ with PB cylinders on in- and outside of the PS membrane after ageing (85:15 v/v). (d) Schematic of sheet and vesicles with bicontinuous membrane. (e) TEM and tomographic reconstruction of PB network within the PS sheet of S₃₀₇B₅₃₀T₇₅ (60:40 v/v) (PB cyan, PS omitted). (f) Fully evolved vesicle with bicontinuous membrane of S₃₀₇B₅₃₀T₆₃ on ageing (60:40 v/v). (g) Schematic of the core–shell sheets and (lamellar) vesicle. (h) TEM image of a core–shell sheet of S₃₀₀B₇₅₆T₅₆ (n-hexane/isopropanol 50:50 v/v) and (i) core–shell (lamellar) vesicle of S₃₀₀B₇₅₆T₅₆ in (n-hexane/isopropanol 35:65 v/v). Scale bars, 200 nm in TEM images and 25 nm in the reconstructions.