Figure 3.

Shear stress (σ) as function of strain (γ) at 10 rad s^-1 for different concentrations. Solid circle, 5 wt.%; solid inverted triangle, 10 wt.%; solid square, 15 wt.%; solid diamond, 20 wt.% and solid triangle, 25 wt.%. The inset shows yield stress as a function of the nanoparticles concentrations.