Fig. 7
From: Diffusing wave paradox of phototactic particles in traveling light pulses
Light activated motion. a Experimentally measured propulsion velocity vp versus illumination intensity . Below and above Ir, particle move with the cap in the rear and the front. In the presence of a light gradient, additional torques are acting on the particle, which leads to negative and positive phototactic motions below and above Ir, respectively37. b Reorientation time τ as a function of the gradient magnitude |∇I|. The solid curve shows a theoretical fit (see the section “Methods” for details). The error bars represent the s.d. (Inset) Time evolution of the angle for an AP within a light gradient |∇I| = 0.018 μW μm−3. The solid curve shows the theoretical fit (see the section “Methods” for details)
