Fig. 9.

(a) High-speed-camera image to observe the jet morphology during electrospinning of the nylon 6 solution. Three regions are identified as stable straight jet, laterally vibrating jet, and the bending jet undergoing the bending instability. Note the presence of a knotting point, below which a vigorous lateral vibration is seen. The speed of lateral movement is ca. 95 m/s, estimated by successive high-speed-camera images. (b) Schematics for the morphology of Taylor cone and electrified jet. The dotted black lines in the vibrating jet region show the rapid lateral vibration, indicating the initial formation of thin solid layer. Reprinted with permission from [111]. © 2011 Elsevier B.V.