Figure 16.

Dynamic light scattering results of Au (red dots), Au@Fe₃O₄ (blue dots) dispersed in n-heptane, and Au@Fe₃O₄@SiO₂ (black dots) in water (λ = 632.8 nm, T = 293 K, viscosity η: 0.41 cP n-heptane, 1.005 cP water). a) Universally scaled autocorrelation functions measured at scattering angle θ = 30° together with biexponential fitting function lines and corresponding residues. b) Apparent diffusion coefficients as a function of the scattering vector q² in the range of scattering angle 30° ≤ θ ≤ 150°.