Fig. 2: Raft dynamics.
From: Clustering induces switching between phoretic and osmotic propulsion in active colloidal rafts
A Sequence of images showing the attraction of a silica colloid towards the hematite particle once blue light is applied (t = 0). B Relative speed Δvr versus relative distance Δr: the solid line is fitted to the data (blue circles) following Eq. (3). Inset displays a heat map of the velocity and direction of a passive particle near the hematite one. The errors in the graph have been obtained from the statistical average of 64 independent experiments. C Mean cluster speed \({\bar{v}}_{c}\) and D mean square displacement versus time from experiments (blue lines) and numerical simulations (orange disks). In both graphs the shaded blue regions denote the confidence interval, indicating the range within which the averages (blue lines) are with a probability of 95%, assuming a Student’s t-distribution.
