(A) Growth mechanism of multiblock copolymer. The addition of tetrahydrofuran (THF) first triggered the sphere-disk transition. The anisotropic shape enables disklike micelles to form multi-block chain copolymer structures through one-dimensional preferential growth. (B) Molecular structures of PAA-b-PMA-b-PS and organic diamine (EDDA). (C) In the presence of EDDA, PAA₉₄-b-PMA₁₀₃-b-PS₄₄ formed into spherical micelles at the 1:4 ratio of THF to water (molar ratio of amine groups:acid groups = 1:1). Scale bar: 200 nm. (D) TEM image of spherical micelles aggregated one-dimensionally immediately after continued addition of THF to the original solution to achieve a final THF to water ratio of 2:1. Scale bar: 200 nm. (E) TEM image of the one-dimensionally assembled PAA₉₄-b-PMA₁₀₃-b-PS₄₄ multiblock structure in 67% THF/water solution. The sample shown here was stained with an aqueous solution of uranyl acetate. Scale bar: 200 nm. Inset: schematic drawing of cross section of one-dimensional assembled structures (Reproduced from Ref. [119]. Copyright©2007, The American Association for the Advancement of Science). (F) Schematic illustration of the prepared Pt^II and Pd^II multiblock copolymers through a living supramolecular polymerization method. (G₁) Confocal image of sample A, triblock red-green-red copolymers. Scale bar: 8 μm. (G₂) Confocal images of sample B, triblock green-red-green copolymers. Scale bar: 8 μm. (G₃) Confocal images of sample C, pentablock copolymers. Scale bar: 5 μm. (G₄) Confocal images of sample D, multiblock copolymers. Scale bar: 5 μm (Reproduced from Ref. [120]. Copyright©2020, Elsevier Inc.).