Theoretical Study on the Capillary Force between an Atomic Force Microscope Tip and a Nanoparticle
LI Zhao-Xia 1,2, ZHANG Li-Juan 1,2, YI Hou-Hui 1,2, FANG Hai-Ping1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 100080
Theoretical Study on the Capillary Force between an Atomic Force Microscope Tip and a Nanoparticle
LI Zhao-Xia 1,2;ZHANG Li-Juan 1,2;YI Hou-Hui 1,2;FANG Hai-Ping1
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 2018002Graduate School of the Chinese Academy of Sciences, Beijing 100080
摘要Considering that capillary force is one of the most important forces between nanoparticles and atomic force microscope (AFM) tips in ambient atmosphere, we develop an analytic approach on the capillary force between an AFM tip and a nanoparticle. The results show that the capillary forces are considerably affected by the geometry of the AFM tip, the humidity of the environment, the vertical distance between the AFM tip and the nanoparticle, as well as the contact angles of the meniscus with an AFM tip and a nanoparticle. It is found that the sharper the AFM tip, the smaller the capillary force. The analyses and results are expected to be helpful for the quantitative imaging and manipulating of nanoparticles by AFMs.
Abstract：Considering that capillary force is one of the most important forces between nanoparticles and atomic force microscope (AFM) tips in ambient atmosphere, we develop an analytic approach on the capillary force between an AFM tip and a nanoparticle. The results show that the capillary forces are considerably affected by the geometry of the AFM tip, the humidity of the environment, the vertical distance between the AFM tip and the nanoparticle, as well as the contact angles of the meniscus with an AFM tip and a nanoparticle. It is found that the sharper the AFM tip, the smaller the capillary force. The analyses and results are expected to be helpful for the quantitative imaging and manipulating of nanoparticles by AFMs.
LI Zhao-Xia;ZHANG Li-Juan;YI Hou-Hui;FANG Hai-Ping. Theoretical Study on the Capillary Force between an Atomic Force Microscope Tip and a Nanoparticle[J]. 中国物理快报, 2007, 24(8): 2289-2292.
LI Zhao-Xia, ZHANG Li-Juan, YI Hou-Hui, FANG Hai-Ping. Theoretical Study on the Capillary Force between an Atomic Force Microscope Tip and a Nanoparticle. Chin. Phys. Lett., 2007, 24(8): 2289-2292.
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