High-throughput generation of coalescence-free droplets by introducing additional oil with high concentration of surfactant

The goal of this study is to generate droplets in a high-throughput manner without coalescence. For this purpose, an additional oil injector was applied into a conventional droplet generator. We demonstrated that our device can stabilize the droplets by injecting the additional oil. The surfactant concentration in the additional oil is higher than that in the oil for the droplet generation, resulting in a high-throughput droplet generation of 4,200 droplets/s.