Figure 3From: Thermal diffusivity measurement for urchin-like gold nanofluids with different solvents, sizes and concentrations/shapesUV-vis absorption spectrum and shift in the absorption of urchin-like gold nanoparticles. (A) UV-vis absorption spectrum of the synthesised urchin-like gold nanoparticles. (B) Shift in the absorption (λrps) of urchin-like gold nanoparticles with particle size.Back to article page