Morphology and structure characterizations of Nb2O5 nanorod precursors: (a) low-magnification SEM image shows that these precursor nanorods have a uniform diameter and length; (b) high-magnification SEM image. The bottom inset is a low-magnification TEM image of a single solid nanorod. The top inset shows a HRTEM image of the boxed region shown in the bottom inset of Figure 2c, which indicates that these precursor nanorods grow along the  direction.
Liu et al. Nanoscale Research Letters 2011 6:138 doi:10.1186/1556-276X-6-138