Figure 3
From: Revealing the static and dynamic nanomechanical properties of diatom frustules—Nature's glass lace

AFM study of cleaned frustules and wet diatom cells. Topography of a measured: (a) inner side and (b) outer side of cleaned frustule, (c) wet diatom cell. Young’s modulus of: (d) inner and (e) outer surface of cleaned frustule, (f) wet diatom cell.