Halide-assisted differential growth of chiral nanoparticles with threefold rotational symmetry

Jiapeng Zheng, Christina Boukouvala, George R. Lewis, Yicong Ma, Yang Chen, Emilie Ringe (), Lei Shao (), Zhifeng Huang and Jianfang Wang ()
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Jiapeng Zheng: The Chinese University of Hong Kong
Christina Boukouvala: University of Cambridge
George R. Lewis: University of Cambridge
Yicong Ma: Hong Kong Baptist University
Yang Chen: The Chinese University of Hong Kong
Emilie Ringe: University of Cambridge
Lei Shao: School of Electronics and Information Technology, Sun Yat-sen University
Zhifeng Huang: The Chinese University of Hong Kong
Jianfang Wang: The Chinese University of Hong Kong

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract 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.

Date: 2023
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DOI: 10.1038/s41467-023-39456-8

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