“…Indeed, many publications reported the characteristics of various electrode arrangements including point-to-plane 3 , point-to-grid 4 , point-to-ring 5 , wire-to-plate 6 , wire-to-incline wing 7 , where ion wind is generated from a thin wire/needle with high curvature, yielding high velocity of ion wind near the surface of the collector electrode. Many other developments of this method using needle-toparallel plates 8 , point-to-wire 9 , rod-to-plate 10 , point-to-parallel plate 8 , wire-to-cylinder 11 , wire-to-wire 12 , or point-to-cylinder 13 have been recently suggested. Furthermore, several geometrical improvements of electrodes have also been reported to optimise ion flows by using alternating negative/positive 14 , multi electrodes 15 .…”