期刊
PHYSICAL REVIEW LETTERS
卷 108, 期 1, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.015503
关键词
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资金
- French ANR [ANR-08-JCJC-0051-01]
- Agence Nationale de la Recherche (ANR) [ANR-08-JCJC-0051] Funding Source: Agence Nationale de la Recherche (ANR)
The influence of sliding velocity on the adhesion force in a nanometer-sized contact was investigated with a novel atomic force microscope experimental setup that allows measuring adhesion forces while the probe is sliding at continuous and constant velocities. For hydrophobic surfaces, the adhesion forces (mainly van der Waals forces) remain constant, whereas for hydrophilic surfaces, adhesion forces (mainly capillary forces) decrease linearly with a logarithmic increase of the sliding velocity. The experimental data are well explained by a model based on a thermally activated growth process of a capillary meniscus.
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