Fig. 4: Relative friction coefficient for biological surface with CH2 groups.
From: Unexpected large impact of small charges on surface frictions with similar wetting properties
a Plane model of a carbon-based solid surface composed of CH2 groups. b Estimated relative friction coefficient λk/λ0.06 of liquid water on the solid surface simulated with the Green–Kubo relationship (black solid columns), relative friction calculated from contact angles in ref. 35 (red textured columns), and contact angles (wine squares) for various atoms with charges of less than 0.36 e on solid surface composed of CH2 groups. This panel also shows the various small charge carbon atoms less than 0.36 e in some typical biological protein residues.
