Paper
A Novel Micro Flow-Focusing Device for the Control of Droplet Contents
- Authors:
- Jayesh Wagh; Jean Berthier
- Abstract
- Micro flow-focusing devices (mFFDs) have been used extensively to produce emulsions and for the on-line encapsulation of biologic objects, such as bacteria and cells. More recently, new designs of this type of instrument have been imagined, for example to produce multi-layered capsules. In this work, we present a novel design of mFFD that comprises “moustaches”, i.e. escape microchannels, just upstream of the orifice. In the context of encapsulation, such a design authorizes the control of the number of biologic objects imprisoned in a single capsule, and avoids the emission of empty capsules. We have denoted this new type of FFD by the abbreviation EFFD, for “Escape FFD”. We first present the concept of the system, then we derive the pressure conditions for the proper functioning of the device, and finally we present an experimental realization.
- Keywords
- Flow-Focusing Device; Encapsulation; Meniscus Stability; Interface Breakup; Escape Channels
- StartPage
- 89
- EndPage
- 95
- Doi