Droplet microfluidics offers exquisite control over the flows of multiple fluids in microscale, enabling fabrication of advanced microparticles with precisely tunable structures and compositions in a highthroughput manner. The combination of these remarkable features with proper materials and fabricationmethods has enabled high efficiency, direct encapsulation of actives in microparticles whose featuresand functionalities can be well controlled. 

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Microparticles and Microcapsules have been shown a huge number applications, particularly in tissue engineering (Dinh et al Small, 2017), drug delivery (Dinh et al Lab Chip, 2020), synthetic cell (Nature Communications, 2017) medical device (Nature Communications, 2019), cosmetics, and the food industry. Droplet microfluidics has been used to fabricate microcapsule encapsulating cargos (antibodies, vitamin C, proteins, and nanoparticles) in a precise and uniform manner.