Figure 4From: In situ Precursor-Template Route to Semi-Ordered NaNbO3 Nanobelt ArraysSEM images of Na 7 (H 3 O)Nb 6 O 19 ·14H 2 O precursor prepared at different NaOH concentrations: a, b 0.5–0.8 M, and c, d 1–1.5 M.Back to article page