Open AccessExtension of Compositional Space to the Ternary in Alloy Chiral Nanoparticles through Galvanic Replacement Reactions
Author(s) -
Ni Ziyue,
Zhu Yuanmin,
Liu Junjun,
Yang Lin,
Sun Peng,
Gu Meng,
Huang Zhifeng
Publication year - 2020
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.202001321
Subject(s) - chirality (physics) , ternary operation , materials science , nanomaterials , nanoparticle , dopant , galvanic cell , chemical engineering , nanotechnology , doping , metallurgy , optoelectronics , physics , chiral symmetry breaking , quantum mechanics , computer science , nambu–jona lasinio model , engineering , programming language , quark
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.