Fig. 1: Schematic illustrating the synthesis process of the chiral nanocrystals.
From: Halide-assisted differential growth of chiral nanoparticles with threefold rotational symmetry
a The as-prepared Au nanodisks were added as the seeds into the growth solution made by mixing GSH, CTAB, KI, HAuCl4, and AA. b Chiral nanocrystals in a variety of shapes prepared by HADG on the anisotropic nanodisks. The Au nanodisks can evolve into chiral nanocrystals with different dominant rotation symmetries by using different CTAB/KI concentrations. c–f SEM images and schematics of the typical chiral and achiral nanocrystals, including 432 helicoid nanocrystals with dominant fourfold rotational (FFR) symmetry (c, d), Au nanotriskelions with dominant threefold rotational (TFR) symmetry (e), and nanogears (f). These nanocrystals were synthesized using the Au nanodisks as the seeds and different CTAB/KI concentrations.
