超晶格
范德瓦尔斯力
手性(物理)
材料科学
相(物质)
化学物理
基质(水族馆)
凝聚态物理
纳米技术
物理
手征对称性
光电子学
分子
量子力学
海洋学
地质学
Nambu–Jona Lasinio模型
夸克
作者
Shan Zhou,Jiahui Li,Jun Lü,Haihua Liu,Jiyoung Kim,Ah Young Kim,Lehan Yao,Chang Liu,Qian Chang,Zachary D. Hood,Wenxiang Chen,Thomas Gage,Ilke Arslan,Alex Travesset,Kai Sun,Nicholas A. Kotov,Qian Chen
出处
期刊:Nature
[Springer Nature]
日期:2022-11-28
卷期号:612 (7939): 259-265
被引量:29
标识
DOI:10.1038/s41586-022-05384-8
摘要
The unique topology and physics of chiral superlattices make their self-assembly from nanoparticles a holy grail for (meta)materials. Here we show that tetrahedral gold nanoparticles can spontaneously transform from a perovskite-like low-density phase with corner-to-corner connections into pinwheel assemblies with corner-to-edge connections and denser packing. While the corner-sharing assemblies are achiral, pinwheel superlattices become strongly mirror-asymmetric on solid substrates as demonstrated by chirality measures. Liquid-phase transmission electron microscopy and computational models show that van der Waals and electrostatic interactions between nanoparticles control thermodynamic equilibrium. Variable corner-to-edge connections among tetrahedra enable fine-tuning of chirality. The domains of the bilayer superlattices display strong chiroptical activity identified by photon-induced near-field electron microscopy and finite-difference time-domain simulations. The simplicity and versatility of the substrate-supported chiral superlattices facilitate manufacturing of metastructured coatings with unusual optical, mechanical and electronic characteristics.
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