Table 2.
Generalized Kelvin–Voigt viscoelastic model parameter sets resulting from nonlinear least-squares fits of AFM-SFS force–indentation data. Characteristic times are given in units of [s], and compliances are provided in units of [Pa−1]. Note that the parameter sets utilized for generating the final fit are marked with an asterisk (*).
| velocity [nm/s] | parameter | number of elements | ||||
| 1 | 2 | 3 | 4* | 5 | ||
| 10 | Jg | 3.76e-11 | 3.87e-12 | 3.79e-11 | 1.51e-11 | 2.65e-14 |
| J1 | 3.4e-09 | 2.22e-14 | 7.39e-11 | 3.5e-12 | 4.98e-12 | |
| τ1 | 9.56e-04 | 2.22e-05 | 2.98e-04 | 5.1e-05 | 1.1e-04 | |
| J2 | 3.94e-09 | 2.75e-10 | 1.09e-09 | 4.62e-10 | ||
| τ2 | 9.99e-03 | 1.01e-03 | 8.89e-03 | 4.53e-03 | ||
| J3 | 5.4e-09 | 2.11e-09 | 1.98e-09 | |||
| τ3 | 9.94e-02 | 7.55e-02 | 3.45e-02 | |||
| J4 | 8.24e-09 | 7.51e-09 | ||||
| τ4 | 7.52e-01 | 5.01e-01 | ||||
| J5 | 2.49e-09 | |||||
| τ5 | 8.05 | |||||
| 1 | 2 | 3* | 4 | 5 | ||
| 100 | Jg | 4.86e-14 | 2.88e-13 | 2.15e-11 | 6.14e-11 | 1.87e-10 |
| J1 | 2.8e-09 | 2.22e-14 | 1.06e-10 | 3.2e-14 | 3.16e-10 | |
| τ1 | 9.71e-04 | 2.32e-04 | 7.58e-04 | 5.15e-04 | 9.89e-04 | |
| J2 | 4.63e-09 | 3.27e-10 | 5.1e-10 | 7.05e-11 | ||
| τ2 | 9.99e-03 | 6.33e-04 | 1.06e-03 | 8.13e-03 | ||
| J3 | 4.94e-09 | 4.61e-09 | 4.68e-09 | |||
| τ3 | 1.72e-02 | 1.7e-02 | 1.66e-02 | |||
| J4 | 4.66e-09 | 2.23e-09 | ||||
| τ4 | 7.45e-01 | 9.02e-01 | ||||
| J5 | 3.02e-09 | |||||
| τ5 | 3.76 | |||||
| 1 | 2 | 3* | 4 | |||
| 1000 | Jg | 5.1e-14 | 3.73e-14 | 3.65e-11 | 2.48e-14 | |
| J1 | 3.18e-09 | 1.24e-09 | 1.64e-09 | 6.92e-10 | ||
| τ1 | 9.96e-04 | 5.82e-04 | 7.35e-04 | 9.7e-04 | ||
| J2 | 7.64e-09 | 2.22e-14 | 9.77e-10 | |||
| τ2 | 9.46e-03 | 6.26e-03 | 6.11e-04 | |||
| J3 | 3.51e-08 | 1.71e-08 | ||||
| τ3 | 6.08e-02 | 3.85e-02 | ||||
| J4 | 1.25e-07 | |||||
| τ4 | 9.3e-01 | |||||