Figure 4
From: Revealing the static and dynamic nanomechanical properties of diatom frustules—Nature's glass lace
AFM indentation at specific points of a cleaned inner valve. (a) Inner surface of a frustule measured by the stiff probe after indentation at specific points by applying different indentation force, (b) Young’s modulus calculated using the Derjaguin–Muller–Toropov (DMT) model at different applied forces after averaging over 10 points, (c) the dependence of hardness on the applied force.
