Supplementary Figure 3: Ferrofluid droplet actuation in a polyacrylamide gel.
From: In vivo quantification of spatially varying mechanical properties in develo** tissues
Temporal evolution of the strain (solid black circles) during the actuation cycles shown in Supplementary Video 2. The inset shows the measured linear stress-strain relation, where the slope corresponds to the apparent elasticity EA that combines the effect of the gel elastic modulus and the droplet capillary stress (see Methods and Supplementary Figure 4).