Figure 2.

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 [001] direction.