| Experimental Investigation of the Velocity Effect on Adhesion Forces with an Atomic Force Microscope |
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| 作者姓名： | 魏征 赵亚溥 |
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| 作者单位： | StateKeyLaboratoryofNonlinearMechanics,InstituteofMechanics,ChineseAcademyofSciences,Beijing100080 |
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| 摘 要： | Capillary forces are significantly dominant in adhesive forces measured with an atomic force microscope (AFM) in ambient air, which are always thought to be dependent on water film thickness, relative humidity, and the free energy of water film. We study the nature of the pull-off force on a variety of surfaces as a function of tip velocity. It is found that the capillary forces are of relatively strong dependence on tip velocity. The present experiment is expected to provide a better understanding of the work mechanism of AFM in ambient air.
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| 关 键 词： | 原子力显微镜 附着力 速度效应 毛细管力 自由能 |
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