Chemical Research in Chinese Universities ›› 2025, Vol. 41 ›› Issue (3): 637-642.doi: 10.1007/s40242-025-5041-9

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Fabrication of Chiral Nanostructured Ag Films

ZHANG Wanning, FANG Yuxi, CHE Shunai   

  1. State Key Laboratory of Synergistic Chem-Bio Synthesis, School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, P. R. China
  • Received:2025-03-13 Revised:2025-04-09 Online:2025-06-01 Published:2025-05-27
  • Contact: CHE Shunai,E-mail:chesa@sjtu.edu.cn;FANG Yuxi,E-mail:sjtu15901600323@sjtu.edu.cn E-mail:chesa@sjtu.edu.cn;sjtu15901600323@sjtu.edu.cn
  • Supported by:
    This work was supported by the National Key R&D Program of China (No. 2021YFA1200301) and the Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University, China (No. 21TQ1400219).

Abstract: Chiral nanostructured Ag films (CNAFs) with lattice distorted nanoflakes were fabricated utilizing phenylalanine (Phe) as the symmetry-breaking agent and AgNO3 as a silver source through an electrodeposition method. With prolonged electrodeposition duration or reduced applied potentials, the nanoflakes gradually thickened and enlarged, ultimately transforming into nanoblock architectures in CNAFs. The morphology of CNAFs underwent a progressive transition from nanoblocks to nanoflakes as the Phe and AgNO3 concentrations increased. The CNAFs stacked with vertically aligned Ag nanoflakes exhibited plasmon resonance absorption-based and scattering-based optical activities in the range of 200-800 nm. It is speculated that the carboxyl and amine groups of Phe could interact with silver ions through electrostatic and coordination interactions, while the π-π stacking of Phe would facilitate the formation of chiral assemblies to achieve chirality transfer.

Key words: Chiral nanostructured Ag film, Chirality transfer, Electrodeposition