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The structures formed by the condensation and evaporation of water on mica surfaces at room temperature have been imaged with nanometer resolution. The technique used is based on the measurement of the polarization force between a charged AFM tip and the surface. This allowed us to perform non-contact imaging at tip-surface distances of a few hundred angstroms, which is critical to not perturb the...
The frictional behavior of mica surfaces with silicon nitride tips has been investigated systematically with the AFM as a function of load, tip geometry, mica lattice orientation and humidity. Frictional forces are found to be proportional to loads between 10 and 80 nN. The friction coefficient is quite reproducible for different samples, tip radii, scanning speed and direction. At low loads, however,...
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