Figure 2.

Microjet gradient array. (a) Schematic of one chamber of the microjet gradient generator array device. The entire device is made of 1024 such chambers. (b) A photograph of the device bonded onto glass and connected to fluidic lines (50 μm wide and 40 μm high) carrying 20 mM red and blue food-coloring dyes. (c) A micrograph showing 3 rows and 10 columns of the array, with chambers filled with opposing gradients of red and blue food-coloring dyes. (d) A magnified inset picture showing two chambers with a gradient.