期刊
CHEMISTRY OF MATERIALS
卷 33, 期 15, 页码 6227-6232出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.1c01998
关键词
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资金
- National Natural Science Foundation of China [21931008, 21922304, 21873072, 21975184]
- science foundation of the Shanghai Municipal science and Technology Commission [19JC1410300]
Chiral superstructures can be created by inducing anisotropic epitaxial growth of chiral CdSe/CdS nanorods and their self-assembly into chiral nematic-like films. The resulting films exhibit excitonic absorption- and scattering-based optical activities, as well as circularly polarized luminescence, all thanks to their hierarchical chirality.
Chiral superstructures are ubiquitous in nature and display intriguing and elegant performances, which inspired us to realize multiscale chiral mesostructured inorganics. Here, we report cholic acid-induced anisotropic epitaxial growth of chiral CdSe/CdS nanorods (CCCNs) and their self-assembly into chiral nematic-like films (CNFs) via an evaporation-induced self-assembly route. Three levels of chirality exist in the CNFs assembled with CCCNs: a primary chiral distortion of the nanorod, a secondary chiral nematic-like phase in which layered nanobelts are stacked to form with a side-by-side arrangement of the CCCNs, and tertiary helical planks with stacking of the layered chiral nematic-like phase creating a banded spherulite structure. The CNFs exhibited excitonic absorption- and scattering-based optical activities and circularly polarized luminescence due to their hierarchical chirality.
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