Fig. 2
copyright 2003 Frenot and Chronakis)
Scanning electron micrographs showing flat ribbons formation during electrospinning of PET (polyethylene terephthalate) from a solution of 13 wt.% in 1:1 dichloromethane and trifluoroacetic acid. Left magnification × 1000, right: an enlarged image with magnification × 3500. (Adapted with permission from [13]