Peak Force Quantitative Nanomechanical (PF QMN) mapping.

<p>The elasticity of the organic matrix associated with <i>N. curvilineata</i> (a), <i>S. turris</i> (b), <i>A. salina</i> (c), and calcofluor-stained material from <i>A. salina</i> (d) are shown.PF QNM generates an elasticity map over the entire scanned region, variations in intensity relate to differences in elasticity. Mean elasticity value and scans size are respectively; 7.1, 11.6, 6.8 and 10.7 GPa and 5, 3.6, 5×3 and 5 µm.