Journal
SCIENCE
Volume 359, Issue 6377, Pages 775-778Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao1290
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Funding
- W. M. Keck Foundation
- NSF-DMR [1506750]
- NSF-DMR-CAREER [1654102]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1654102, 1506750] Funding Source: National Science Foundation
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Many complex fluids rely on surfactants to contain, protect, or isolate liquid drops in an immiscible continuous phase. Thin elastic sheets can wrap liquid drops in a spontaneous process driven by capillary forces. For encapsulation by sheets to be practically viable, a rapid, continuous, and scalable process is essential. We exploit the fast dynamics of droplet impact to achieve wrapping of oil droplets by ultrathin polymer films in a water phase. Despite the violence of splashing events, the process robustly yields wrappings that are optimally shaped to maximize the enclosed fluid volume and have near-perfect seams. We achieve wrappings of targeted three-dimensional (3D) shapes by tailoring the 2D boundary of the films and show the generality of the technique by producing both oil-in-water and water-in-oil wrappings.
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