Research Article

Assembly of Oriented Ultrafine Polymer Fibers by Centrifugal Electrospinning

Figure 4

Optical microscope images of PVP fibers electrospun at conditions of 6.2 kV and 3.0 cm with rotational velocity of (a) 360 rpm, (b) 420 rpm, and (c) 540 rpm.
713275.fig.004a
(a)
713275.fig.004b
(b)
713275.fig.004c
(c)