Figure 2
From: Diameter control of ultrathin zinc oxide nanofibers synthesized by electrospinning
SEM images of the ZnO-PVP composite nanofibers electrospun from a mixture of ZnO sol–gel and PVP solution. Concentrations of zinc acetate are 0.1 M (top row), 0.4 M (middle row), and 0.75 M (bottom row); those of the PVP solution are 0.08, 0.12, and 0.14 g/mL from the left to the right column, respectively. High-magnification SEM images (1,100 nm × 900 nm) are shown as insets.