期刊
ADVANCED MATERIALS
卷 32, 期 31, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202002356
关键词
self-assembly; capillary forces; chiral microstructures; laser printing
类别
资金
- National Natural Science Foundation of China [51875544, 91963127, 51675503, 61805230, 51805509]
- USTC Research Funds of the Double First-Class Initiative [YD2090002005]
- Youth Innovation Promotion Association of the Chinese Academy of Sciences [2017495]
- National Key R&D Program of China [2018YFB1105400]
- Foundation of Equipment Development Department [6140922010901]
Artificial microstructures composed of chiral building blocks are of great significance in the fields of optics and mechanics. Here, it is shown that highly ordered chiral structures can be spontaneously assembled by a meniscus-directed capillary force arising in an evaporating liquid. The chirality is facilitated by rationally breaking the intrinsic symmetry in the unit cells through cooperative control of the geometry and spatial topology of the micropillars. The interfacial dynamics of the assembly process are studied to show that the sequential self-organization of the micropillars is influenced by the geometries, stiffness, and spatial arrangements. A diversity of chiral assemblies with controlled handedness is yielded by varying the pillar number, height, cross-section, laser power, and spatial topology. Lastly, the differential reflectance of light carrying opposite orbital angular momentums on the assembled chiral architectures are investigated, showcasing their potential in the field of chiral photonics concerning enantioselective response and exceptional optical functions.
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