Figure 6.

Water and Al2O3 nanoparticle drops of different particle concentrations on heater surfaces boiled in corresponding nanoparticle concentration nanofluid [44]. (a) θ = 90°, water on clean heater wire; (b) θ = 46.5°, droplet of 0.00257 g/l concentration of Al2O3 nanofluid (APS 46 nm) on heater wire coated with nanoparticles after boiling this fluid; (c) θ = 33°, droplet of 0.00646 g/l concentration of Al2O3 nanofluid (APS 46 nm) on heater wire coated with nanoparticles after boiling this fluid.

Barber et al. Nanoscale Research Letters 2011 6:280   doi:10.1186/1556-276X-6-280
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