In this paper, experiments investigating the evaporation of gold nanofluid droplets to evaluate the effect of the particle size (5 and 10 nm) and concentrations (1 and 4% Cv), were executed on a hydrophobic silicon substrate at different surface temperature (amb, 60 and 80 °C). A drop shape analyzer was utilized to record the evaporation process for the profile used under the same conditions (50% humidity, Tatm=25 °C). Also, an infrared camera is used to observe the droplet surface gradient temperature, air/liquid, at the same time. The analysis focus on the influence of size and concentration of nanoparticles on the evaporation rate compared to the base fluid (distiled water). In addition, the effect of gradient surface temperature instabilities due to Marongoni cells on the dynamic deposition of nanoparticles at the surface is examined [1].