Table 1 Estimates for the range of Z0 from literature.

From: Depth-dependent hysteresis in adhesive elastic contacts at large surface roughness

Materials

Geometry

Range

Silica–Silica46

Sphere (of radius 3.8 μm)–Plate

10 nm

Polystyrene–Glass47

Sphere (of radius 6 μm)–Plate

20–100 nm

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