Pan Shuang, Peng Juan, Lin Zhiqun
School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai, 200438, China.
Angew Chem Int Ed Engl. 2021 May 17;60(21):11751-11757. doi: 10.1002/anie.202101272. Epub 2021 Apr 12.
Rapid and deliberate patterning of nanomaterials over a large area is desirable for device manufacturing. We report a method for meniscus-assisted self-assembly (MASA)-enabled rapid positioning of hierarchically assembled dots and stripes composed of luminescent conjugated polymer over two length scales. Periodically arranged conjugated poly(9,9-dioctylfluorene) (PFO) polymers, yield dots, punch-holes and stripes at microscopic scale via MASA. Concurrent self-assembly of PFOs into two-dimensional lenticular crystals within each dot, punch-hole and stripe is realized at nanoscopic scale. Hierarchical assembly is achieved by constraining the evaporation of the PFOs solution in two approximately parallel plates via a MASA process. The three-phase contact line (TCL) of the liquid meniscus of the PFOs was printed using the upper plate, yielding an array of curved stripes. Rapid creation of hierarchical assemblies via MASA opens up possibilities for large-scale organization of a wide range of soft matters and nanomaterials.
在大面积上快速且精确地构建纳米材料的图案对于器件制造而言是很有必要的。我们报道了一种通过弯月面辅助自组装（MASA）实现的方法，该方法能够在两个长度尺度上对由发光共轭聚合物组成的分层组装的点和条纹进行快速定位。周期性排列的共轭聚（9,9 - 二辛基芴）（PFO）聚合物，通过MASA在微观尺度上产生点、穿孔和条纹。在纳米尺度上，PFO同时自组装成每个点、穿孔和条纹内的二维透镜状晶体。通过MASA过程，在两个大致平行的平板中限制PFO溶液的蒸发，从而实现分层组装。使用上平板打印PFO液体弯月面的三相接触线（TCL），产生一系列弯曲条纹。通过MASA快速创建分层组装为广泛的软物质和纳米材料的大规模组织开辟了可能性。
