Fig. 8.

All MSD curves at different waiting times, t_w, are collapsed onto one master curve by horizontal shifting (170 kPa and 290 kPa, circles and diamonds correspondingly). The amount of shift for each curve defines a characteristic time τ which is the Δt at which MSD(Δt, t_w) crosses an arbitrary MSD value of 10³ nm². Inset: τ increases with t_w as a power law ($\tau \approx t_{\mathrm{w}}^{\mu }$), while μ varies according to the applied acoustic pressure; 0.26 and 0.45 for 170 kPa (circles) and 290 kPa (diamonds), respectively.