Table 2.
Nanoindentation results of three layers for all samples. Here, the properties are the average values, including their standard deviation.
| Sample | Layer | Distance from surface, x (μm) | Hardness, H (GPa) | Stiffness, Er (GPa) |
|---|---|---|---|---|
| Claw (CL) | Exocuticle (near the surface) | 20 | 3.87 ± 0.14 | 56.0 ± 1.06 |
| Exocuticle(1/2t) | 125 | 2.4 ± 0.13 | 47.3 ± 2.11 | |
| Intermediate | 280 | 0.41 ± 0.06 | 13.6 ± 1.05 | |
| Endocuticle(1/2t) | 1500 | 0.61 ± 0.04 | 18.1 ± 0.88 | |
| First walking leg (1WL) | Exocuticle (near the surface) | 20 | 3.60 ± 0.15 | 61.3 ± 0.44 |
| Exocuticle(1/2t) | 110 | 2.91 ± 0.21 | 61.6 ± 1.62 | |
| Intermediate | 255 | 0.47 ± 0.03 | 16.5 ± 0.74 | |
| Endocuticle(1/2t) | 600 | 0.70 ± 0.09 | 22.9 ± 1.57 | |
| Front cephalothorax (FC) | Exocuticle (near the surface) | 18 | 4.01 ± 0.24 | 68.1 ± 3.21 |
| Exocuticle(1/2t) | 50 | 2.60 ± 0.26 | 46.1 ± 2.20 | |
| Intermediate | 125 | 0.47 ± 0.09 | 15.3 ± 1.34 | |
| Endocuticle(1/2t) | 350 | 0.25 ± 0.04 | 9.19 ± 0.86 | |
| Rear cephalothorax (RC) | Exocuticle (near the surface) | 18 | 2.86 ± 0.33 | 56.3 ± 3.72 |
| Exocuticle(1/2t) | 50 | 1.40 ± 0.07 | 33.3 ± 1.38 | |
| Intermediate | 80 | 0.25 ± 0.04 | 12.4 ± 1.25 | |
| Endocuticle(1/2t) | 350 | 0.19 ± 0.02 | 8.81 ± 0.70 | |
| Abdomen (AM) | Exocuticle (near surface) | 18 | 3.50 ± 0.19 | 65.0 ± 2.73 |
| Exocuticle(1/2t) | 50 | 1.61 ± 0.31 | 33.1 ± 3.80 | |
| Intermediate | 100 | 0.40 ± 0.04 | 14.16 ± 1.08 | |
| Endocuticle(1/2t) | 250 | 0.15 ± 0.03 | 9.42 ± 1.16 |