Considerable research is currently underway to understand the heat transfer behavior of nano-solutions, or solutions obtained by adding small concentrations of nano-meter sized particles to liquids [1], [2] and [3]. One area of interest is in boiling flow systems, where the ability to enhance heat transfer would improve the overall efficiency of the systems, reduce operational cost and provide greater safety margins if the maximum heat flux limit could be increased. The effect of nano-particles on heat transfer is currently hard to predict; in one recent study [4], the heat transfer in a pool boiling system actually decreased with the addition of Al2O3 particles. In this work, the pool boiling behavior of silica particles with diameters ranging from 15 to 3000 nm is studied, and boiling curves are generated from the nucleate boiling to the film boiling regimes under atmospheric pressure.