Table 1

Mechanical responses of the substrate under friction with different probe radiuses
Probe radius 6 nm 8 nm 10 nm 12 nm
Critical penetration force (nN) 387.1 565.9 814.4 1,081.1
Critical penetration depth (nm) 0.65 0.72 0.80 0.87
Critical contact pressure (GPa) 28.3 25.1 25.2 25.2
Average friction coefficient 0.126 0.118 0.103 0.098

Li et al.

Li et al. Nanoscale Research Letters 2013 8:514   doi:10.1186/1556-276X-8-514

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