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. 2020 Jun 24;20(8):5792–5798. doi: 10.1021/acs.nanolett.0c01659

Figure 4.

Figure 4

Clear hyper-Rayleigh scattering (HRS) optical activity from suspensions of Au helicoids at multiple wavelengths and independent of incident power. (a) HRS ellipticity spectra from suspensions of core/shell helicoids dispersed in 9:1 solution of 1 mM aqueous cetrimonium bromide (CTAB) and ethanol. Each data point corresponds to the median average of >10 individual HRS ellipticity measurements, at different illumination powers; error bars are the interquartile range. All these individual measurements are shown in (b). (c) The corresponding HRS CD spectra for helicoids with no shell dispersed in 1 mM aqueous CTAB solvent. (d) HRS intensity of core/shell helicoids dispersed in 9:1 solution of 1 mM aqueous CTAB and ethanol, as a function of the angle of linearly polarized illumination, at the wavelength of 730 nm.