Fig. 5.

Small-amplitude oscillatory shear measurement of the mechanical properties of the Sylgard 527 elastomer with a strain-controlled rheometer (Physica MCR 500; Anton Paar). Dashed line: best fit of the Chasset–Thirion model, $\mu (\omega )=G\prime (\omega )+i{G}^{″}(\omega )={\mu }_0(1+{(i\omega \tau )}^m)$, to the experimental data. ${\mu }_0=1085\pm 124$ Pa, $m=0.66\pm 0.04$ and $\tau =15.4\pm 0.4$ ms.