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. 2016 Apr 19;7:11331. doi: 10.1038/ncomms11331

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(a) TEM image of a single Ag_0.97Ti_0.03:L₂ nanohelix (Scale bar, 50 nm). (b) CD spectra of colloidal Ag_0.97Ti_0.03:L₂ nanohelices in media of five different refractive indices (red: 0%, orange: 5%, green: 10%, blue: 15% and violet: 20% glycerol-water mixtures) over the full spectral range and detailed plots of the resonance shifts at (c) λ_m (red square), (d) λ₀₁ (orange circle), (e) λ_M (green top triangle) and (f) λ₀₂ (blue bottom triangle). For d and f the filled curves represent |CD|⁻¹. (g) Wavelength shift, relative to water, of the four spectral features as functions of the glycerol-water concentration (top x axis) and its corresponding n (bottom x axis).