Enantioselective synthesis of chiroplasmonic helicoidal nanoparticles by nanoconfinement in chiral dielectric shells

Xiaoxi Luan, Yu Tian, Fengxia Wu, Lu Cheng, Minghua Tang, Xiali Lv, Haili Wei, Xiaodan Wang, Fenghua Li, Guobao Xu and Wenxin Niu ()
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Xiaoxi Luan: Chinese Academy of Sciences
Yu Tian: Chinese Academy of Sciences
Fengxia Wu: Chinese Academy of Sciences
Lu Cheng: SINOPEC
Minghua Tang: Soochow University
Xiali Lv: Chinese Academy of Sciences
Haili Wei: Chinese Academy of Sciences
Xiaodan Wang: Chinese Academy of Sciences
Fenghua Li: Chinese Academy of Sciences
Guobao Xu: Chinese Academy of Sciences
Wenxin Niu: Chinese Academy of Sciences

Nature Communications, 2025, vol. 16, issue 1, 1-15

Abstract: Abstract Helicoid metal nanoparticles with intrinsic chirality have unveiled tailorable properties and unlocked many chirality-related applications across various fields. Nevertheless, the existing strategies for enantioselective synthesis of helicoid metal nanoparticles have been predominantly limited to gold. Here, we demonstrate a robust and versatile strategy for the enantioselective synthesis of helicoid nanoparticles beyond gold, leveraging chiral nanoconfinement provided by chiral SiO2 or nanoshells. The chiral nanoconfinement strategy enables the decoupling of ligand-directed crystal growth from chiral induction, allowing for the independent tuning of these two critical aspects. As a result, this approach can not only facilitate the replication of chiral shapes from the chiral nanoshells but also allow the generation of alternative chiral shapes. By employing this approach, we demonstrate the enantioselective synthesis of helicoid Pt, Au@Pt, Au@Pd, Au@Ag, and Au@Cu nanoparticles. The chiroplasmonic properties of Pt- and Pd-based chiral nanoparticles have been discovered, and the inversion of chiroplasmonic properties of Ag-based chiral nanoparticles via facet control has been documented and theoretically explained. The chiral nanoconfinement strategy enriches the toolbox for creating chiral nanoparticles and supports their exploration in diverse applications.

Date: 2025
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DOI: 10.1038/s41467-025-57624-w

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