Fig. Optical fluid pump by using laser. The droplets were segregated from homogeneous solution by the laser irradiation, and emerged droplets generated unidirectional motion caused by the asymmetry of geometry. (Left) Schematic illustration of the experimental setup. (Center) The flow profile from experimental result. (Right) The flow profile from numerical simulation.
Fig. Specific localization of actin and DNA. Actin and DNA exhibited specific localization in Cell-sized Aqueous/aqueous Micro Droplets (CAMD) that were spontaneously formed through water/water micro phase-segregation under crowding conditions with coexisting polymers.
Fig.1: Schematic representations of the experimental system with bird view in (a) and side view in (b); typical snapshots at 0 and 540 seconds (left panel) and the real-time trajectories of the large sphere (right panel) for two distinct packing fractions η = 0.1(NL = 1 and NS = 29) in (c) and 0.6(NL = 1 and NS = 229) in (d), where dL =10mm, dS =3mm and D = 60mm. The scale bar is10mm. Note that the dotted circles in the trajectory plots indicate the outermost boundary which can be reached by the center of mass of a large sphere within the cylindrical disk.
FIG. 1. Self-revolution of plastic particles. (a) Initial condition at t = 0 s from when DC voltage was applied. (b) Overlap of snapshots every 0.53 s. Multiple polyethylene particles with radii of r = 50 – 175µm rotate in the oil phase with an anionic surfactant at V = 170 V.
FIG. 2. (a-1, b): Angular velocity and angular acceleration depending on the angular position of the particle in the presence of an anionic surfactant (a-1), or a cationic surfactant (b). (a-2): The blue solid line is the velocity and the red dotted line is the acceleration. Videos of these experiments are shown in the Supplemental Materials.14 The radius of rotation in both the anionic and cationic surfactants depends on the initial position of a particle. Particle size: d=175 µm. Applied voltage: V =170 V and 180 V for (a) and (b), respectively.
Fig. 1 Negative chemotactic behavior of an oleic acid droplet floating on an aqueous solution against NH3 vapor. (a) Snapshots of an oleic acid droplet moving away from ammonia vapor. (b) Spatio-temporal diagram of droplet motion, where x=0 corresponds to the center of the droplet at the initial position.
Fig. 2 Positive chemotactic behavior of an aniline droplet vs. HCl vapor. Superimposed image of the aniline droplet moving toward the HCl vapor