Py Charlotte, Reverdy Paul, Doppler Lionel, Bico José, Roman Benoît, Baroud Charles N
Physique et Mécanique des Milieux Hétérogènes, ESPCI, Paris 6, Paris 7, UMR CNRS 7636, 75231 Paris cedex 5, France.
Phys Rev Lett. 2007 Apr 13;98(15):156103. doi: 10.1103/PhysRevLett.98.156103.
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 tailoring the initial geometry of the flat membrane. Balancing interfacial energy with elastic bending energy provides a critical length scale below which encapsulation cannot occur, which is verified experimentally. This length is found to depend on the thickness as h3/2, a scaling favorable to miniaturization which suggests a new way of mass production of 3D micro- or nanoscale objects.
弹性与毛细作用之间的相互作用被用于通过平面薄片包裹液滴来制造三维结构。最终的封装三维形状通过定制扁平膜的初始几何形状来控制。将界面能与弹性弯曲能相平衡可提供一个临界长度尺度，低于该尺度封装就无法发生，这一点已通过实验得到验证。发现该长度与厚度的3/2次方成正比，这种比例关系有利于小型化，这为三维微米或纳米级物体的大规模生产提供了一种新方法。
