Alternating Current Electrohydrodynamic Printing of Microdroplets

Figure 3

Printed droplets under AC voltage with different negative AC voltage amplitude 𝑈_𝑎. Negative AC voltage amplitude and collector motion velocity were (a) 𝑈_𝑎=0 kV, 𝑣_col=10 mm/s; (b) 𝑈_𝑎=0.5 kV, 𝑣_col=14 mm/s; (c) 𝑈_𝑎=0.75 kV, 𝑣_col=14 mm/s; (d) 𝑈_𝑎=1 kV, 𝑣_col=20 mm/s; (e) 𝑈_𝑎=1.25 kV, 𝑣_col=20 mm/s; (f) 𝑈_𝑎=1.5 kV, 𝑣_col=30 mm/s; (g) 𝑈_𝑎=1.75 V, 𝑣_col=30 mm/s; (h) 𝑈_𝑎=2 kV, 𝑣_col=30 mm/s. The scale bar is 1000 μm.

(a)

(b)

(c)

(d)

(e)

(f)

(g)

(h)