FIG. 4.

Scheme of the experimental procedure to produce and analyse the PDMS liquid droplets and the subsequent solid particles: (1) production of PDMS liquid droplets by using our flow focusing technique, and measurement of the droplets size in liquid phase, (2) curing process at 70 °C by using the heater of a common magnetic stirrer, and (3) visualization of the samples through a glass optical cell to measure the size distribution of the particles after curing by using our optical imaging method (most of the blurred points in the image correspond to unfocused particles).