Fig. 3: Controllable synthesis of the Au l-nanotriskelions.
From: Halide-assisted differential growth of chiral nanoparticles with threefold rotational symmetry
a–c Extinction dissymmetry factor spectra for the l-nanotriskelions with various dimensions, which were synthesized by use of the Au precursor with different amounts (a) and the Au nanodisk seeds with different thicknesses (b) and diameters (c). The nanotriskelions marked by, e.g., 90/20-4, means that the seeds are the Au nanodisks with an average diameter of 90 nm and an average thickness of 20 nm and the added amount of the Au precursor is 4 μmol for the Au nanodisk seeds with an optical density of 0.8. d SEM images for the l-nanotriskelions with varying dimensions, including the observation from the top (top) and side (bottom). All the scale bars are the same. e Schematics of the Au nanotriskelions with the arm length LL and the thickness TL indicated. f Aspect ratios of the Au nanotriskelions, defined as 2LL/TL in (d). All error bars show mean ± standard deviation. n = 100 independent experiments. g Dependence of the peak wavelength in the CD spectra on the nanotriskelion arm length. The trend is represented as the red solid lines. All error bars show mean ± standard deviation. n = 100 independent experiments. Source data are provided as a Source Data file.
