Electrohydrodynamic Direct-Write Orderly Micro/Nanofibrous Structure on Flexible Insulating Substrate

Figure 4

Micro/nanofibrous structure direct-written on insulate PET substrate under AC electrical field. The motion velocity of substrate was (a) 𝑣_col=50 mm/s; (b) 𝑣_col=100 mm/s; (c) 𝑣_col=200 mm/s; (d) 𝑣_col=700 mm/s; (e) 𝑣_col=1000 mm/s; and (f) 𝑣_col=1500 mm/s. Experimental condition: 𝐶=14 wt%, 𝑈₋=−4 kV, 𝑈₊=4 kV, 𝑓_app=500 Hz, 𝜌=50%, 𝐻=2 mm, and 𝑄=50 μL/hr.

(a)  

(b)