Figure 3 | Scientific Reports

Figure 3

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

Figure 3

(a) Photograph and (b) UV/VIS/NIR spectrum of GNPs synthesized with different molar ratios of Na2HPO4: HEPES. Curves in (b) are coloured according to the colour in (a) with corresponding Na2HPO4: HEPES molar ratio. Arrows in (b) present the trended change of absorbance peak as the molar ratio changes. (c) The peak wavelength and corresponding absorbance change of first peak (top) and second peak (bottom) as a function of Na2HPO4: HEPES molar ratio.

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