The thermodynamics of this process have been investigated computationally in previous work, with the hBN sheets shown to reside slightly on the oil side of the oil: water interface. Mixing a combination of oil and water with hBN produces an hBN-stabilized water-in-oil emulsion with a film of overlapping hBN sheets, stabilizing the dispersed water droplets against coalescence. This is illustrated by the series of optical images shown in Fig. , where a hBN stabilized water-in-oil emulsion was imaged as the oil phase (heptane) evaporated. Fig. shows the initial emulsion.