Figure 3
From: Ultrathin MoS2 Nanosheets with Superior Extreme Pressure Property as Boundary Lubricants

The analysis of the wear scar of the test of the lubricant containing the as-synthesized MoS2 nanosheets stopped at 2000 N.
(a) The SEM image of the wear scar and the width is about 1.39 ± 0.06 mm. (b) The EDS spectra (1) inside and (2) outside the wear scar and the elements of Mo and S can only be detected inside the wear scar. (c) XPS analysis of the elenents of Mo and S in the wear scar, with Mo3d3/2 at 231.7 eV, Mo3d5/2 at 228.6 eV, S2s at 226.3 eV, S2p1/2 at 163.2 eV and S2p3/2 at 162.0 eV.