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Shin, Minjoong; Kim, Hayeon; Park, Geonhyeong; Park, Jongmin; Ahn, Hyungju; Yoon, Dong Ki; Lee, Eunji; Seo, Myungeun Bilayer-folded lamellar mesophase induced by random polymer sequence Journal Article Nat. Commun., 13 , pp. 2433, 2022, ISBN: 2041-1723. Abstract | BibTeX | Tags: Copolymer Phase transition behavior RAFT polymerization Self-assembly X-ray scattering @article{Seo2022c, title = {Bilayer-folded lamellar mesophase induced by random polymer sequence}, author = {Minjoong Shin AND Hayeon Kim AND Geonhyeong Park AND Jongmin Park AND Hyungju Ahn AND Dong Ki Yoon AND Eunji Lee AND Myungeun Seo}, url = {https://www.nature.com/articles/s41467-022-30122-z}, doi = {10.1038/s41467-022-30122-z}, isbn = {2041-1723}, year = {2022}, date = {2022-05-04}, journal = {Nat. Commun.}, volume = {13}, pages = {2433}, abstract = {Randomness is perceived in two different extremes, in macroscopic homogeneity and local heterogeneity, but apparently far away from order. Here we show that a periodic order spontaneously arises from a binary random copolymer when self-assembly occurs in an ensemble containing > 1015 possible chain sequences. A Bernoullian distribution of hydrophilic and hydrophobic side chains grafted onto a linear backbone was constructed by random copolymerization. When the polymer chains associate in water, a sequence matching problem occurs because of the drastic heterogeneity in sequence: this is believed to generate local curvature mismatches which deviate from the ensemble-averaged interfacial curvature. Periodic folding of the self-assembled bilayer stabilizes the curvature instability as recurring hinges. Reminiscent of chain-folded lamellae found in polymer crystallization, this new liquid crystalline mesophase, characterized as bilayer-folded lamellae, manifests itself as an anisotropically alignable birefringent hydrogel with structural hierarchy across multiple length scales.}, keywords = {Copolymer, Phase transition behavior, RAFT polymerization, Self-assembly, X-ray scattering}, pubstate = {published}, tppubtype = {article} } Randomness is perceived in two different extremes, in macroscopic homogeneity and local heterogeneity, but apparently far away from order. Here we show that a periodic order spontaneously arises from a binary random copolymer when self-assembly occurs in an ensemble containing > 1015 possible chain sequences. A Bernoullian distribution of hydrophilic and hydrophobic side chains grafted onto a linear backbone was constructed by random copolymerization. When the polymer chains associate in water, a sequence matching problem occurs because of the drastic heterogeneity in sequence: this is believed to generate local curvature mismatches which deviate from the ensemble-averaged interfacial curvature. Periodic folding of the self-assembled bilayer stabilizes the curvature instability as recurring hinges. Reminiscent of chain-folded lamellae found in polymer crystallization, this new liquid crystalline mesophase, characterized as bilayer-folded lamellae, manifests itself as an anisotropically alignable birefringent hydrogel with structural hierarchy across multiple length scales. |