Efficient On‐Demand Compound Droplet Formation: From Microfluidics to Microdroplets as Miniaturized Laboratories

Microdroplets are naturally well-defined reactors for performing reactions on the microscale. An innovative technique is presented to achieve one-step compound droplet formation in a microfluidic-channel structure. The image shows a droplet in the formation process and a droplet flowing downstream of the channel with mixing/reaction occurring inside it. Red and green colors denote different regents. Detailed facts of importance to specialist readers are published as ”Supporting Information”. Such documents are peer-reviewed, but not copy-edited or typeset. They are made available as submitted by the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.