Fig. 3: Synergistic phototaxis of AIE/Au nanomotors.
From: Photoactivated nanomotors via aggregation induced emission for enhanced phototherapy
a AIE polymersomes transduce radiant energy into motion via the hemispherical Au nanoshell to synergistically enhance performance. b Particle trajectories of nanomotors measured using two-photon confocal laser scanning microscopy (TP-CLSM) at different laser powers. c Mean squared displacement (MSD) data for nanomotors at 760 nm (TP-NIR) and accompanying velocities derived from motion in the xy plane (Vxy) at varying laser power, alongside (d) MSD data for an Au-coated, non-AIE polymersome control (gray, cf. Supplementary Fig. 42). Brownian diffusion (random walk) and propulsive (directional) motion are identified by linear or non-linear MSD data, respectively. e MSD data (measured using Nanoparticle Tracking Analysis, NTA) for nanomotors comparing AIE-activated enhanced diffusion at 405 nm and Brownian diffusion at 488 nm. f Experimental setup to measure directional phototaxis using an NTA channel. g Directional particle trajectories of nanomotors under directional laser illumination (NIR, 660 nm) from the upper left and (h) accompanying MSD data with and without NIR illumination. Error bars depict the Standard Deviation (SD) from analysis by confocal tracking.
