Extended Data Fig. 8: Gravity modulation of the kinetic performance of the PTV.
From: Self-regulated underwater phototaxis of a photoresponsive hydrogel-based phototactic vehicle
a–f, Snapshots and time evolution of the displacement under different excess gravity conditions. The PTV moves vertically to the water surface, indicating a zero-frequency of hopping, as no cycle is accomplished (a, b, Gex = 4 × 10−6 N), hops towards the light with a finite frequency (c, d, Gex = 6 × 10−6 N) and slides to the right, essentially exhibiting an infinite frequency (e, f, Gex = 12 × 10−6 N). g, h, Measured feedback frequencies (g) and the displacement in the z direction (h) and of the PTV under different excess gravity.
