Table 1. Composition of acrylamide/bis-acrylamide of fabricated polyacrylamide substrates.
| PAA hydrogel | Acrylamide (%) | Bis-Acrylamide (%) | Nexp | E (kPa) |
|---|---|---|---|---|
| A | 7.5 | 0.05 | - | 3.4 * |
| B | 7.5 | 0.3 | 6 | 13 ± 1 |
| C | 12 | 0.14 | 7 | 18 ± 1 |
| D | 12 | 0.28 | 4 | 37 ± 7 |
| E | 12 | 0.6 | 6 | 46 ± 4 |
Young’s modulus, E, measured averaging the results of force-distance curves obtained in Nexp experiments. More than 1000 curves were analyzed for each PAA composition. Errors represent the standard error (SE).
* estimated by relative concentrations, using as a reference values obtained in Aratyn-Schaus et al., 2010 [10] and the measured E of hydrogel B.