作者:Yiwen Li、Kai Guo、Hao Su、Xiaopeng Li、Xueyan Feng、Zhao Wang、Wei Zhang、Sunsheng Zhu、Chrys Wesdemiotis、Stephen Z. D. Cheng、Wen-Bin Zhang
DOI:10.1039/c3sc52718b
日期:——
The convenient synthesis of nano-building blocks with strategically placed functional groups constitutes a fundamental challenge in nano-science. Here, we describe the facile preparation of a library of mono- and di-functional (containing three isomers) polyhedral oligomeric silsesquioxane (POSS) building blocks with different symmetries (C3v, C2v, and D3d) using thiol-ene chemistry. The method is
Superlattice Engineering with Chemically Precise Molecular Building Blocks
作者:Xiao-Yun Yan、Qing-Yun Guo、Xian-You Liu、Yicong Wang、Jing Wang、Zebin Su、Jiahao Huang、Fenggang Bian、Haixin Lin、Mingjun Huang、Zhiwei Lin、Tong Liu、Yuchu Liu、Stephen Z. D. Cheng
DOI:10.1021/jacs.1c09831
日期:2021.12.29
emergence. In the current work, we demonstrate that properly designed molecular systems could generate a spectrum of unconventional superlattices. Four categories of giant molecules are presented. We systematically explore the lattice-forming principles in unary and binary systems, unveiling how molecular stoichiometry, topology, and size differences impact the mesoatoms and further toward their superlattices
Pathway toward Large Two-Dimensional Hexagonally Patterned Colloidal Nanosheets in Solution
作者:Bo Ni、Mingjun Huang、Ziran Chen、Yingchao Chen、Chih-Hao Hsu、Yiwen Li、Darrin Pochan、Wen-Bin Zhang、Stephen Z. D. Cheng、Xue-Hui Dong
DOI:10.1021/ja511694a
日期:2015.2.4
We report the solution self-assembly of an ABC block terpolymer consisting of a polystyrene-block-poly(ethylene oxide) (PS-b-PEO) diblock copolymer tail tethered to a fluorinated polyhedral oligomeric silsesquioxane (FPOSS) cage in 1,4-dioxane/water. With increasing water content, abundant unconventional morphologies, including circular cylinders, two-dimensional hexagonally patterned colloidal nanosheets, and laterally patterned vesicles, are sequentially observed. The formation of toroids is dominated by two competing free energies: the end-cap energy of cylinders and the bending energy to form the circular structures. Incorporating the superhydrophobic FPOSS cages enhances the end-cap energy and promotes toroid formation. Lateral aggregation and fusion of the cylinders results in primitive nanosheets that are stabilized by the thicker rims to partially release the rim-cap energy. Rearrangement of the parallel-aligned FPOSS cylindrical cores generates hexagonally patterned nanosheets. Further increasing the water content induces the formation of vesicles with nanopatterned walls.