Figure 3.

SEM micrographs and fiber size distribution histogram of the as-spun MgFe2O4/PVP composite sample a.a5,000× SEM image,b10,000× SEM image,c30,000× SEM image, anddfiber size distribution histogram

Maensiri et al. Nanoscale Research Letters 2008 4:221-228   doi:10.1007/s11671-008-9229-y