Figure 1

Injection amount calibration.
(a) Water droplets dispensed in oil. (b) Water droplets after injection. Scale bar, 30 μm. (c) Linearity of injection volume versus injection pressure (R2 = 0.999, y = 181.1 + 97.3x). (d) Linearity of injection volume versus injection time (R2 = 0.999, y = 86.9 + 0.756x). Error bars in (c,d) indicate the SD of three independent experiments.