Figure 6.

Influence of probe radius on the friction of the substrate. (a,b,c,d) Surface morphologies of the substrate after scratching with probe radiuses of 6, 8, 10, and 12 nm, respectively. Atoms are colored according to their height in Y direction. (e,f,g,h) Cross-sectional views of the substrate after scratching with probe radiuses of 6, 8, 10, and 12 nm, respectively. Atoms are colored according to shear strain ranging from 0 to 1.

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