Figure 4
Quantitative experiments of picolitre monodisperse droplet printing. (a) Frequency and voltage distribution of the input signal that can realize the effect of single droplet printing, where the yellow area indicates that the device has good robustness to the input signal that realizes single droplet printing. (b) Under the trigger of a single pulse cycle signal, the volume of droplets printed by the device changes as the voltage of the control signal changes, due to changes in the amplitude of the micropores. When a certain threshold is reached, the amplitude of the micropores is too large resulting in the production of too many droplets per unit cycle of the signal (comet droplets). (c) The droplet diameter of the signal varies at different pulse periods (500 ms-5 ms), and the number of droplets generated per unit time can be controlled according to this parameter. (d) Distribution curve of droplet generation volume and motion velocity with control signal pulse period. Scale bar is 100 μm.
