fig6

From: Advances on triply periodic hyperbolic surface structures: from biological inspiration to artificial self-assembly

Figure 6. (A-F) 3D imaging of the PI network in self-assembled polylactide-based triblock terpolymers. Simulated images (A-C) and 3D reconstructions (D-F) from electron tomography of PI-b-PS-b-PLLA (A and D), PI-b-PS-b-PDLA (B and E) and PI-b-PS-b-PLA (C and F), respectively; (G-I) SEM images of the Ni network obtained by templating the polylactide network in PI-b-PS-b-PLLA (G), PI-b-PS-b-PDLA (H) and PI-b-PS-b-PLA (I), respectively; (J-N) Torsion angle analysis of the PI networks based on electron tomography. (J) Reconstructed image of the LH PI network in the G^A phase of self-assembled PI-b-PS-b-PDLA. (K) Extracted skeleton of (J) by mesh contraction and pruning process. (L) The definition of torsion angle in the G networks for positive chirality (RH, red) and negative chirality (LH, blue). The yellow arrows indicate the vectors of three consecutive edges. (M and N) The polar histograms of torsion angle distribution for the PI network in PI-b-PS-b-PLLA (M) and PI-b-PS-b-PDLA (N). The red and blue arrows indicate the torsion angles for ideal G networks formed by PI. (A-N) Reproduced under the terms of the CC BY-NC 4.0 License^[86]. Copyright 2020, The Authors; (O and P) Stabilization of different network structures using di-end-functionalized block copolymers. (O) Synthetic routes for the preparation of PS-b-PEO having diphosphonic acid (dPA) end groups. (P) SAXS profiles of end-functionalized PS-b-PEO measured at 25 °C; the dotted SAXS profiles show the morphologies of the end-functionalized block copolymer intermediates. Bright-field TEM images of PS-b-PEO-N-dPA are shown (bottom insets), and tomography images along with a captured TEM image of PS-b-PEO-O-dPA are shown (top insets). (O and P) Reproduced with permission^[27]. Copyright 2024, The American Association for the Advancement of Science. SEO: polystyrene-b-poly(ethylene oxide); SEO-O-dPA: dPA-ended SEOs (ether linker); SEO-N-dPA: dPA-ended SEOs (amine linker); PI-b-PS-b-PLLA: polyisoprene-b-polystyrene-b-poly(L-lactide); PI-b-PS-b-PDLA: polyisoprene-b-polystyrene-b-poly(D-lactide); PI-b-PS-b-PLA: polyisoprene-b-polystyrene-b-poly(D,L-lactide); G: gyroid; PI: polyisoprene; PS-b-PEO: polystyrene-b-poly(ethylene oxide); SAXS: small-angle X-ray scattering; TEM: transmission electron microscopy; PS-b-PEO-N-dPA: dPA-ended PS-b-PEO (amine linker); 3D: three-dimensional.