Figure 3: Checkerboard pattern of fluids
Shown is a pattern of hydrophobic squares in a checkerboard pattern fabricated by microcontact printing a hydrophilic SAM on the surface. A droplet of colored water rests upon each square. A hydrophobic SAM several microns in width separates the hydrophilic squares (and thus the water droplets) from each other. Image courtesy of Felice Frankel.