Controlled Synthesis of Au Chiral Propellers from Seeded Growth of Au Nanoplates for Chiral Differentiation of Biomolecules
2020
Ma, Yongjie | Cao, Zhaozhen | Hao, Jinjie | Zhou, Junhao | Yang, Zhijie | Yang, Yanzhao | Wei, Jingjing
Chiral plasmonic nanocrystals are promising materials for applications in enantioselective catalysis, DNA detection, and medical diagnosis. Herein, we demonstrate a simple and versatile strategy that produces plasmonic nanostructures with strong chiroptical responses by a chiral ligand mediated seeded growth approach. By modulation of the surface coverage of chiral ligands on Au nanotriangles, propeller-like structures with the growth of three arms on the tips of the triangles are produced with a high anisotropy factor. Finally, these Au chiral propellers can be used as substrates for the surface-enhanced Raman scattering (SERS) detection of chiral biomolecules, achieving chiral differentiation for enantiomers of biomolecules.
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