Capillary force with a concave probe-tip for micromanipulation

被引:26
作者
Saito, S
Motokado, T
Obata, KJ
Takahashi, K
机构
[1] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Mech & Aerosp Engn, Meguro Ku, Tokyo 1528552, Japan
[2] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Mech & Control Engn, Meguro Ku, Tokyo 1528552, Japan
[3] Tokyo Inst Technol, Grad Sch Sci & Engn, Dept Int Dev Engn, Meguro Ku, Tokyo 1528552, Japan
关键词
D O I
10.1063/1.2139848
中图分类号
O59 [应用物理学];
学科分类号
摘要
This letter describes the measurement of capillary force with a concave probe-tip for micromanipulation. Using an electric balance, we measure the capillary force for a given gap distance between a spherical object and a concave surface coaxially fabricated on a cylinder. We used three different materials (glass, stainless steel, and polytetrafluoroethylene) to check the influence of contact angles. The results are in good agreement with the theoretical prediction expressed in the normalized form; these indicate that a concave tip can generate a much larger capillary force than a flat one, provided the tip is designed to fit the convex surface of the object; moreover the results clarify that the more wettable a material is, the greater capillary force it can generate. This suggests micromanipulation by capillary force should be more practical by using probes with concave tips specifically designed for the object. (c) 2005 Americian Institute of Physics.
引用
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页码:1 / 3
页数:3
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