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Description of the movies:
All movies are presented in real time. The alternating current (AC) electric field direction is between the top and bottom of the movie screen. The particles move perpendicular to the applied electric field direction with their polystyrene hemisphere (lighter side) forward. The liquid flow around the metal-coated hemisphere (darker side) is much stronger then around the polystyrene hemisphere, driving the particle to move by induced-charge electrophoresis (ICEP) in the direction of the dielectric hemisphere, normal to the electric field.
Please click on the movie titles to run the movie.
Movie ICEP_Motion-3Sizes
Janus particles of diameter 4.0, 5.7, and 8.7 µm moving with dielectric hemisphere forward by ICEP in the direction normal to AC electric field of 300 V/cm and 1 kHz frequency at the top of the experimental cell (of 60 µm thickness). The 8.7 µm particle moves faster than the 5.7 µm particles, which in turn move at a higher velocity than the 4.0 µm particles.
Movie ICEP_Motion-DipoleAggregation
Three gold-coated polystyrene particles (5.7 µm in diameter) moving by ICEP in an AC field of 125 V/cm and 5 kHz frequency at the top of the experimental cell (60 µm thickness). Two of the particles come together, the induced dipoles align/attract and the particles sink toward the bottom of the cell due to dielectrophoresis.
Movie ICEP_Motion-HighConc
Janus particles of diameter 5.7 µm in an AC field of 300 V/cm and 1 kHz frequency at the top of the experimental cell. Particles move by ICEP in either direction normal to the applied electric field. The higher concentration of particles results in increased particle-particle encounters and interactions.
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