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The Largest Quasicrystalline Tiling with Dodecagonal Symmetry from a Single Pentablock Quarterpolymer of the AB1CB2D Type
ACS Nano ( IF 15.8 ) Pub Date : 2022-03-22 , DOI: 10.1021/acsnano.1c11599 Makoto Suzuki 1 , Tsuyoshi Orido 1 , Atsushi Takano 1 , Yushu Matsushita 2
ACS Nano ( IF 15.8 ) Pub Date : 2022-03-22 , DOI: 10.1021/acsnano.1c11599 Makoto Suzuki 1 , Tsuyoshi Orido 1 , Atsushi Takano 1 , Yushu Matsushita 2
Affiliation
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A quasicrystalline tiling pattern with tile size of ca. 60 nm has been discovered in the bulk state of a four-component pentablock polymer molecule of the AS1IS2P type, where A, S, I, and P denote poly(4-vinylbenzyldimethylamine), polystyrene, polyisoprene, and poly(2-vinylpyridine), respectively. The polymer samples used were prepared by anionic polymerizations and have narrow molecular weight distribution. The sample films were obtained by an extremely slow solvent-cast process from dilute solutions of tetrahydrofuran for 14 days. It has been found by TEM observation that the quarterpolymer, AS1IS2P-4 (Mn = 149 kg/mol, ϕA/ϕS1/ϕI/ϕS2/ϕP = 0.12/0.27/0.20/0.29/0.13), reveals two final stable structures, i.e., a 3.3.4.3.4 periodic tiling pattern as a minor component and a quasicrystalline (QC) tiling with dodecagonal symmetry as a major component, where the former includes a triangle/square number ratio of 2 and the latter has one of approximately 2.28, which is close enough to the ideal ratio, 4/ 
2.31, for the triangle/square random tiling of the dodecagonal QC tiling (DDQC). Two structures were also clearly proved by SAXS diffraction patterns. Here, it should be noted this QC structure having a tile side length of ca. 60 nm was created with a single block polymer molecule.
中文翻译：
来自 AB1CB2D 类型的单一五嵌段四分之一聚合物的具有十二角对称性的最大准晶质拼接
瓷砖尺寸为ca的准晶瓷砖图案。在AS 1 IS 2 P型四组分五嵌段聚合物分子的本体状态下发现了 60 nm ，其中 A、S、I 和 P 表示聚（4-乙烯基苄基二甲基胺）、聚苯乙烯、聚异戊二烯和聚（ 2-乙烯基吡啶），分别。所用的聚合物样品是通过阴离子聚合制备的，具有窄的分子量分布。样品薄膜是通过极其缓慢的溶剂浇铸工艺从四氢呋喃稀溶液中获得的，历时 14 天。通过TEM观察发现四元聚合物AS 1 IS 2 P-4 ( M n= 149 kg/mol, φ A /φ S1 /φ I /φ S2 /φ P = 0.12/0.27/0.20/0.29/0.13)，揭示了两个最终的稳定结构，i。即，作为次要组成部分的 3.3.4.3.4 周期性平铺图案和作为主要组成部分的具有十二边形对称性的准晶质 (QC) 平铺，其中前者包括 2 的三角形/正方形数比，后者具有大约2.28，对于十二边形 QC 平铺 (DDQC) 的三角形/正方形随机平铺，足够接近理想比率 4/ 2.31。SAXS 衍射图也清楚地证明了两种结构。在这里，应该注意这个 QC 结构的瓷砖边长为ca. 60 nm 是用单个嵌段聚合物分子创建的。
更新日期：2022-03-22
2.31, for the triangle/square random tiling of the dodecagonal QC tiling (DDQC). Two structures were also clearly proved by SAXS diffraction patterns. Here, it should be noted this QC structure having a tile side length of ca. 60 nm was created with a single block polymer molecule.
中文翻译：
来自 AB1CB2D 类型的单一五嵌段四分之一聚合物的具有十二角对称性的最大准晶质拼接
瓷砖尺寸为ca的准晶瓷砖图案。在AS 1 IS 2 P型四组分五嵌段聚合物分子的本体状态下发现了 60 nm ，其中 A、S、I 和 P 表示聚（4-乙烯基苄基二甲基胺）、聚苯乙烯、聚异戊二烯和聚（ 2-乙烯基吡啶），分别。所用的聚合物样品是通过阴离子聚合制备的，具有窄的分子量分布。样品薄膜是通过极其缓慢的溶剂浇铸工艺从四氢呋喃稀溶液中获得的，历时 14 天。通过TEM观察发现四元聚合物AS 1 IS 2 P-4 ( M n= 149 kg/mol, φ A /φ S1 /φ I /φ S2 /φ P = 0.12/0.27/0.20/0.29/0.13)，揭示了两个最终的稳定结构，i。即，作为次要组成部分的 3.3.4.3.4 周期性平铺图案和作为主要组成部分的具有十二边形对称性的准晶质 (QC) 平铺，其中前者包括 2 的三角形/正方形数比，后者具有大约2.28，对于十二边形 QC 平铺 (DDQC) 的三角形/正方形随机平铺，足够接近理想比率 4/ 2.31。SAXS 衍射图也清楚地证明了两种结构。在这里，应该注意这个 QC 结构的瓷砖边长为ca
. 60 nm 是用单个嵌段聚合物分子创建的。
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