title: Monodisperse gas-filled microparticles from reactions in double emulsions.
abstract: We present a strategy for preparing size-controlled gas-filled microparticles using two aqueous components that chemically react to produce the gas. We use a dual-bore microfluidic device to isolate the reactants of two gas-producing reactions until they are encapsulated in the outer droplet. The reactants in the monodisperse droplets merge and produce the gas bubbles, which are stabilized with a surfactant and form the core of the microparticles. The number and size of the generated gas bubbles are governed by the gas-forming reaction used. Our versatile strategy can be applied to a wide range of gas-producing reactions.
authors.affiliation: School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, United States.
authors.forename: Wynter J
authors.initials: WJ
authors.lastname: Duncanson
authors.forename: Alireza
authors.initials: A
authors.lastname: Abbaspourrad
authors.forename: Ho Cheung
authors.initials: HC
authors.lastname: Shum
authors.forename: Shin-Hyun
authors.initials: SH
authors.lastname: Kim
authors.forename: Laura L A
authors.initials: LL
authors.lastname: Adams
authors.forename: David A
authors.initials: DA
authors.lastname: Weitz
mesh_terms: D004655:Emulsions; D005740:Gases / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D046210:Microfluidic Analytical Techniques; D055616:Microtechnology / Q000379:methods*; D010100:Oxygen / Q000737:chemistry; D013501:Surface-Active Agents / Q000737:chemistry
chemical_list: D004655:Emulsions; D005740:Gases; D013501:Surface-Active Agents; D006861:Hydrogen Peroxide; D010100:Oxygen