Figure 4From: Diameter control of ultrathin zinc oxide nanofibers synthesized by electrospinningTEM images of the fibers electrospun from a solution containing 0.1 M zinc acetate and 0.12 g/mL PVP. After calcination (a, b) at 300°C for 10 min and (c, d) at 500°C for 2 h.Back to article page