Capillary origami: spontaneous wrapping of a droplet with an elastic sheet

Details Capillary origami: spontaneous wrapping of a droplet with an elastic sheet Capillary origami: spontaneous wrapping of a droplet with an elastic sheet

2006-11-27

arxiv.org/abs/cond-mat/0611682v1

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 5 figures

Scientific paper

The interaction between elasticity and capillarity is used to produce three dimensional structures, through the wrapping of a liquid droplet by a planar sheet. The final encapsulated 3D shape is controlled by tayloring the initial geometry of the flat membrane. A 2D model shows the evolution of open sheets to closed structures and predicts a critical length scale below which encapsulation cannot occur, which is verified experimentally. This {\it elastocapillary length} is found to depend on the thickness as $h^{3/2}$, a scaling favorable to miniaturization which suggests a new way of mass production of 3D micro- or nano-scale objects.

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