Figure 6
From: Some aspects of formation and tribological properties of silver nanodumbbells
Comparison of contact areas calculated from experimentally measured friction force and trace areas. Areas of experimentally observed ND traces (Traces), calculated area from friction measurements (Manip), and contact areas calculated by frozen droplet (FDM) and DMT-M (DMT) models. The used parameters are as follows: Θ = 123.8° (contact angle of Ag/SiO2) [27], ν1 = 0.17 (Poisson’s ratio of SiO2) [28], ν2 = 0.36 (Poisson’s ratio of Ag) [28], E1 = 71.7 (Young’s modulus of SiO2, GPa) [28], E1 = EAg = 82.5 (Young’s modulus of Ag, GPa) [28], γ = 50 × 10-3 (the work of adhesion, J/m2) [21], z0 = 0.3 (equilibrium spacing for the Lennard-Jones potential of the surfaces, nm) [29], K = 55.4 (combined elastic modulus, GPa), η = 0.2 (Tabor’s coefficient).