Fingering inside the coffee ring
SCIE
SCOPUS
- Title
- Fingering inside the coffee ring
- Authors
- Weon, BM; Je, JH
- Date Issued
- 2013-01-03
- Publisher
- American Physical Society
- Abstract
- Colloidal droplets including micro- and nanoparticles generally leave a ringlike stain, called the "coffee ring," after evaporation. We show that fingering emerges during evaporation inside the coffee ring, resulting from a bidispersed colloidal mixture of micro- and nanoparticles. Microscopic observations suggest that finger formation is driven by competition between the coffee-ring and Marangoni effects, especially when the inward Marangoni flow is overwhelmed by the outward coffee-ring flow. This finding could help to understand the variety of the final deposition patterns of colloidal droplets. DOI: 10.1103/PhysRevE.87.013003
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/12390
- DOI
- 10.1103/PHYSREVE.87.013003
- ISSN
- 1539-3755
- Article Type
- Article
- Citation
- Physical Review E, vol. 87, no. 1, 2013-01-03
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