Fig. 2. (a) Optical image of the ECL-emitting layer generated by a RDBPE at 25 rpm. The angle θ is used for the azimuthal description. θ = 0° is defined as parallel to the electric field and passing through the center of the RDBPE. The dashed white arrow indicates the direction of the rotation of the RDBPE. The yellow and dashed white circles define the region of interest where the azimuthal analysis was carried out. (b) Azimuthal ECL data in the absence of rotation (black line) and with rotation (25 rpm in red and 300 rpm in green). Same experimental conditions as in Fig. 1.
