局部Casimir力的全局影响：粘附悬臂梁
Global consequences of a local Casimir force: Adhered cantilever
摘要：
虽然静摩擦力对于微系统来说是一个麻烦的问题，但它激发了对表面粘附的研究。事实上，粘附悬臂的形状携带将一端锁定到衬底的粘附能量的信息。我们在这里证明，该系统也是敏感的分散力，是非常接近的接触点，但它们的形状的贡献是最大的约三分之一的未粘附长度。当力超过临界值时，悬臂不会失去稳定性，但它会在较小的未粘附长度处沉降，其与粘附能的关系仅受力的轻微影响。我们的计算表明，使用粘附的杠杆测量色散力在短的分离，在其他方法遭受跳跃接触不稳定。力和粘附能的同时测量允许分离分散体对表面粘附的贡献。
英文摘要：
Although stiction is a cumbersome problem for microsystems, it stimulates investigations of surface adhesion. In fact, the shape of an adhered cantilever carries information of the adhesion energy that locks one end to the substrate. We demonstrate here that the system is also sensitive to the dispersion forces that are operative very close to the point of contact, but their contribution to the shape is maximum at about one third of the unadhered length. When the force exceeds a critical value the cantilever does not lose stability but it settles at smaller unadhered length, whose relation to adhesion energy is only slightly affected by the force. Our calculations suggest to use adhered cantilevers to measure the dispersion forces at short separations, where other methods suffer from jump-to-contact instability. Simultaneous measurement of the force and adhesion energy allows the separation of the dispersion contribution to the surface adhesion.
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