Figure 2
From: Understanding Tribofilm Formation Mechanisms in Ionic Liquid Lubrication
3D APT reconstruction of the IL tribofilm showing a gradient layered structure. (a) Spatial distribution of Fe, FeOx, O, C, and P ionic species. (b) Isoconcentration surfaces of 30 at.% O and 62.5 at.% Fe, and the proximity histogram analysis with respect to 30 at.% O isoconcentration surface.
