Frictional force versus temperature

Figure 3. Mean frictional force versus temperature for a silicon(100) wafer with native oxide.

Figure 6. (a) Frictional force versus temperature for a PMMA film, (b) Frictional force versus temperature for a PET film, (c) Frictional force versus temperature for a PS film. Figures a-c overlaid with literature bulk viscoelastic data. 

Figure 8. Frictional force versus temperature taken at 2, 20, 50, and 220 m/sec. scan velocities for a PMMA film.

The pull-off force (a measure of adhesion) of the probe tip was measured for PMMA, PET, and PS at each temperature (Figure 7a-c) prior to collecting friction images. A frequency of 5 Hz with a maximum applied load of 20nN was used for these force versus distance measurements. Figure 7a displays no temperature dependence on adhesion for PMMA until a temperature of 80 C where a... 

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