5 nm Ordered Structures Self‐Assembled by C₂‐Symmetric Hybrids with Polyhedral Oligomeric Silsesquioxane and Hexa‐peri‐Hexabenzocoronene.

Abstract

Hybrids consisting of polyhedral oligomeric silsesquioxane (POSS) and hexa‐peri‐hexabenzocoronene (HBC) with a dumbbell topology and C2 symmetry were designed and synthesized. They self‐assemble into 5 nm ordered structures. In particular, the increased steric effect with increasing POSS units stabilizes a square columnar phase (Colsqu) which is important in nanotemplating. These hybrids containing discotic liquid crystal HBC and POSS units have an excellent etching contrast and present an approach to obtain 5 nm nanopatterns.

Synthesis, characterization, and self-assembly of a POSS-based Janus molecular particle

“…巨型分子(giant molecules)是Cheng等 [1,2] 近10年来 发展的一类新型软物质大分子, 在分子科学与工程领 域的探索中发挥着越来越重要的作用. 巨型分子兼有 类似嵌段聚合物的本体相分离行为和类似表面活性剂 的溶液组装行为, 同时还表现出丰富的液晶态中间相 行为, 在亚10 nm图案化 [3,4] 、大分子动力学 [5,6] 、单分 子膜 [7] 、生物大分子偶联改性 [8] 、非传统相态(如Frank-Kasper相)的发现 [9,10] 等方面表现出独特的价值和应用 前景. 随着巨型分子的发展, 它们的功能性也备受关 注, 在光电材料 [11~13] 、氟离子监测 [14] 、油水分离 [15] 、 矿物筛选 [16] 等领域都有相关报道, 取得了不少进展.…”