Extension of Compositional Space to the Ternary in Alloy Chiral Nanoparticles through Galvanic Replacement Reactions

Ziyue Ni, Yuanmin Zhu, Junjun Liu, Lin Yang, Peng Sun, Meng Gu*, Jeffery Huang*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

13 Citations (Scopus)


Metal chiral nanoparticles (CNPs), composed of atomically chiral lattices, are an emerging chiral nanomaterial showing unique asymmetric properties. Chirality transmission from the host CNPs mediated with galvanic replacement reactions (GRRs) has been carried out to extend their compositional space from the unary to binary. Further compositional extension to, e.g., the ternary is of fundamental interest and in practical demand. Here, layer-by-layer glancing angle deposition is used to dope galvanically “inert” dopant Au in the host Cu CNPs to generate binary Cu:Au CNPs. The “inert” dopants serve as structural scaffold to assist the chirality transmission from the host to the third metals (M: Pt and Ag) cathodically precipitating in the CNPs, enabling the formation of polycrystalline ternary Cu:Au:M CNPs whose compositions are tailored with engineering the GRR duration. More scaffold Au atoms are favored for the faster chirality transfer, and the Au-assisted chirality transfer follows the first-order kinetics with the reaction rate coefficient of ≈0.3 h−1 at room temperature. This work provides further understanding of the GRR-mediated chirality transfer and paves the way toward enhancing the application functions in enantiodifferentiation, enantioseperation, asymmetric catalysis, bioimaging, and biodetection.

Original languageEnglish
Article number2001321
Number of pages11
JournalAdvanced Science
Issue number23
Early online date27 Oct 2020
Publication statusPublished - 2 Dec 2020

Scopus Subject Areas

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

User-Defined Keywords

  • chiral nanoparticles
  • galvanic replacement reactions
  • glancing angle deposition
  • optical activity
  • ternary alloys


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