Enriching the library of chiral plasmonic nanoparticles that can be chemically mass-produced will greatly facilitate the applications of chiral plasmonics in areas ranging from constructing optical metamaterials to sensing chiral molecules and activating immune cells. Here we report on a halide-assisted differential growth strategy that can direct the anisotropic growth of chiral Au nanoparticles with tunable sizes and diverse morphologies. Anisotropic Au nanodisks are employed as seeds to yield triskelion-shaped chiral nanoparticles with threefold rotational symmetry and high dissymmetry factors. The averaged scattering g-factors of the l- and d-nanotriskelions are as large as 0.57 and − 0.49 at 650 nm, respectively. The Au nanotriskelions have been applied in chiral optical switching devices and chiral nanoemitters. We also demonstrate that the manipulation of the directional growth rate enables the generation of a variety of chiral morphologies in the presence of homochiral ligands.

丰富可化学大规模生产的手性等离子体纳米颗粒库将极大地促进手性等离子体在构建光学超材料、传感手性分子和激活免疫细胞等领域的应用。在这里，我们报告了一种卤化物辅助差异生长策略，该策略可以指导具有可调尺寸和不同形态的手性金纳米颗粒的各向异性生长。采用各向异性金纳米盘作为种子，产生具有三重旋转对称性和高不对称因子的三链形手性纳米粒子。l和d的平均散射g因子-nanotriskelions 在 650 nm 处分别为 0.57 和 - 0.49。Au纳米三线已应用于手性光开关器件和手性纳米发射器。我们还证明，定向生长速率的操纵使得能够在纯手性配体存在的情况下产生各种手性形态。