Instant fabrication and selection of folded structures using drop impact.
basic_science · Level V
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- Record sourced from PubMed, PMID 21670249.
- Also identified by DOI 10.1073/pnas.1101738108 and PMC identifier 3127932.
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Abstract
A drop impacting a target cutout in a thin polymer film is wrapped by the film in a dynamic sequence involving both capillary forces and inertia. Different 3D structures can be produced from a given target by slightly varying the impact parameters. A simplified model for a nonlinear dynamic Elastica coupled with a drop successfully explains this shape selection and yields detailed quantitative agreement with experiments. This first venture into the largely unexplored dynamics of elastocapillary assemblies opens up the perspective of mass production of 3D packages with individual shape selection.