Phys. Rev. Lett. 83, 3328–3331 (1999)Adhesion and Friction Forces between Spherical Micrometer-Sized ParticlesReceived 16 April 1999; published in the issue dated 18 October 1999 An experimental setup, based on the principles of atomic force microscopy (AFM), was used to measure directly the adhesion and rolling-friction forces between individual silica microspheres of radii between 0.5 and 2.5 μm. It showed that the linear dependence of the pull-off force on the particle radius is still valid for micron-sized particles. Rolling-friction forces between silica microspheres were measured for the first time by combining AFM methods and optical microscopy: They are ∼100 times lower than the corresponding adhesion forces. © 1999 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.3328
DOI:
10.1103/PhysRevLett.83.3328
PACS:
81.40.Pq, 61.16.Ch, 83.70.Fn
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