Figure 8.

a SEM image of the product prepared at 150–180°C for 20–24 h, indicating the coexistence of Na7(H3O)Nb6O19·14H2O nanobelts and NaNbO3 cubes. b NaNbO3 nanocube film obtained at 200–220°C for 18–24 h.

Wu and Xue Nanoscale Res Lett 2011 6:14   doi:10.1007/s11671-010-9757-0