Figure 2 | Scientific Reports

Figure 2

From: A novel, rapid, seedless, in situ synthesis method of shape and size controllable gold nanoparticles using phosphates

Figure 2

(a) Photograph and (b) UV/VIS/NIR spectrum of GNPs synthesized with different molar ratios of NaH2PO4: HEPES. Curves in (b) are coloured according to the colour in (a) with corresponding NaH2PO4: HEPES molar ratio. Arrows in (b) present the trended change of absorbance peak as the molar ratio changes. (c) The wavelength peak and corresponding absorbance change of first peak (wavelength smaller than 550 nm) as a function of NaH2PO4: HEPES molar ratio.

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