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Decompressing Emulsion Droplets Favors Coalescence
Abstract
The destabilization process of an emulsion under flow is investigated in a microfluidic device. The experimental approach enables us to generate a periodic train of droplet pairs, and thus to isolate and analyze the basic step of the destabilization, namely, the coalescence of two droplets which collide. We demonstrate a counterintuitive phenomenon: coalescence occurs during the separation phase and not during the impact. Separation induces the formation of two facing nipples in the contact area that hastens the connection of the interfaces prior to fusion. Moreover, droplet pairs initially stabilized by surfactants can be destabilized by forcing the separation. Finally, we note that the fusion mechanism is responsible for a cascade of coalescence events in a compact system of droplets where the separation is driven by surface tension.
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Citations
Cited by
Seemann, R., Brinkmann, M., Pfohl, T., & Herminghaus, S. (2012) · Reports on Progress in Physics · doi:10.1088/0034-4885/75/1/016601 · Cited by 1,049
The biophysics and cell biology of lipid droplets
Thiam, A. R., Farese Jr, R. V., & Walther, T. C. (2013) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm3699 · Cited by 986
Self-citationSurfactants in droplet-based microfluidics
Baret, J.-C. (2012) · Lab Chip · doi:10.1039/c1lc20582j · Cited by 649
Ho, T. M., Razzaghi, A., Ramachandran, A., & Mikkonen, K. S. (2022) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2021.102541 · Cited by 253
Development and future of droplet microfluidics
Nan, L., Zhang, H., Weitz, D. A., & Shum, H. C. (2024) · Lab on a Chip · doi:10.1039/d3lc00729d · Cited by 253
Metadata
- Authors
- Bremond, N., Thiam, A. R., & Bibette, J.
- Venue
- Physical Review Letters
- Publisher
- American Physical Society (APS)
- Published
- 2008-01-15
- Volume
- 100
- Issue
- 2
- Pages
- 024501-024501
- ISSN
- 0031-9007 (ISSN-L)
- 1079-7114
- OpenAlex
- W2072767820
- Cited by
- 413
- References
- 0
- FWCI
- 28.01
- Type
- journal article
- Language
- en
- Open access
- closed
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