Figure 2: Optical Microscope images of rifampicin solution in microfluidic flow focusing with respective particle size measurement (DLS): (a) the flow rate ratio between water and rifampicin flow (R) is equal to 10, resulting in particle sizes of 690 nm. (b) R is equal to 50, resulting in particle sizes of 160 nm. In these examples the water flow was maintained at 200 μL/min, and rifampicin concentration was 50 mg/mL.