Motion Measurement of RMS Cilia Array
An experiment was conducted to observe the motion of the RMS cilia array by using an external magnetic field. For this purpose, an acrylic channel with dimensions of 8 mm × 30 mm × 5 mm was used, an RMS cilia array was attached to the 30 mm × 5 mm side, and the 8 mm × 30 mm side was used for observation (Figure. 1B(vii)). The RMS cilia array was manipulated in the air using the magnetic field generated by an 8-coil EMA system (Figure. 2C). A magnetic field generated by the EMA system can be divided into a strike magnetic field in which the intensity of the magnetic field changes from -0.02 T to +0.02 T in the vertical direction of the cilia (Figure. 2B(i)) and a rotating magnetic field rotating from 0° to 360° with a constant intensity magnetic field of 0.02 T (Figure. 2B(ii)). When these two types of magnetic fields were applied, the motion of RMS cilia was observed using a CCD camera.