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. 2013 Nov 12;1:18. doi: 10.3389/fchem.2013.00018

Figure 2.

Figure 2

Schematic illustration of the morphology evolution and the growth mechasnim of vanadium oxide nanourchin. (A–F): SEM images of the as-synthesized nanostructures at different growth stages. [Reprinted with permission from reference O'Dwyer et al. (2006). Copyright 2006 American Chemical Society].