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

Figure 3

(a) Charged jet deviates from the straight motion track under DC electrical field; (b) nonuniform fibrous structure deposited on insulating PET substrate under DC electrical field. Experimental condition: 𝑈=3 kV, 𝐻=2 mm, 𝑄=50 μL/hr, and 𝐶=14 wt%; (c) stable straight jet under AC electrical field on the insulating substrate; (d) uniform fibrous structure direct-written on insulating PET substrate. Experimental condition: 𝐶=14 wt%, 𝑈₋=−2.3 kV, 𝑈₊=2.3 kV, 𝑓_app=500 Hz, 𝜌=50%, 𝐻=2mm, 𝑄=50 μL/hr,and 𝑣_col=5 mm/s.

(a)

(b)

(c)

(d)