Figure 7.

(a) Schematic representation of different fields during the electrospinning process. (b–e) FE-SEM images of (b) aligned pure single nanofiber on a triangular-type electrode, (c) aligned pure TiO₂ single nanofiber on a rectangular-type electrode, (d) aligned fiber (before thermal treatment) on the tip of a triangular electrode and (e) TEM image of a pure TiO₂ nanofiber. (a) Reprinted with permission from [86]. Copyrights 2017 ACS; (b–e) Adapted with permission from [141]. Copyright 2015 Elsevier.