Figure 1

Electrode array used in this work.

(a) Schematic of the four arm spiral microelectrode array comprising four parallel spiral elements of 30 μm in width and spacing. The electrodes are energized with a 90° phase shift respective to each other. (b) Working principle of the chip. While cell type A (e.g. red blood cells) is expelled from the electrode array, cell type B (e.g. trypanosomes) is concentrated into the centre of the array. Both processes take place simultaneously.