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. 2014 Sep 5;4:6285. doi: 10.1038/srep06285

Figure 3. Constant-temperature procedures for the solution-growth of ZnO nanorods (90°C and 70°C).

Figure 3

(a) Resonant frequencies of quartz substrates during syntheses performed at 90°C and at 70°C. (b) Derivatives, with respect to time, of the resonant frequencies of quartz substrates during syntheses performed at 90°C and at 70°C (the synthesis at 70°C is initially slower but becomes faster after about 36 minutes). (c) Top view SEM images of the ZnO nanorods grown at 90°C (cross-section in the top-right inset). (d) Top view SEM image of the ZnO nanorods grown at 70°C (cross-section in the top-right inset).