Tailored Double Emulsions Made Simple

Wang J, Hahn S, Amstad E, Vogel N (2021)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2021


Pages Range: e2107338

DOI: 10.1002/adma.202107338


Double emulsions, such as water-in-oil-in-water droplets, are important material platforms for conducting fundamental research and technological applications. To date, well-defined double emulsion droplets consisting of a single water core and a thin oil shell can be exclusively formed with sophisticated microfluidic devices. The fabrication, preparation and operation of such devices is challenging, which reduces the availability of tailored double emulsions to a limited community of experts. Here, we introduce a simple method to produce tailored single-core double emulsions with high yield in large quantities, using a vortex mixer. Utilizing the density difference between the dispersed droplet and the continuous phase, this two-step emulsification method can achieve very small core droplet diameters below ten micrometers and ultra-thin shells with thicknesses below one micrometer. We provide a detailed picture of the formation mechanism and demonstrate that the process can be extended to produce multi-shell and multi-core emulsions. Finally, we demonstrate its application to produce structurally colored colloidal supraparticles with unprecedented uniformity and yield. Our method allows the creation of tailored double emulsions with minimal time, cost, effort and expertise and may widen its application to non-specialized scientific communities. This article is protected by copyright. All rights reserved.

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Wang, J., Hahn, S., Amstad, E., & Vogel, N. (2021). Tailored Double Emulsions Made Simple. Advanced Materials, e2107338. https://doi.org/10.1002/adma.202107338


Wang, Junwei, et al. "Tailored Double Emulsions Made Simple." Advanced Materials (2021): e2107338.

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