Figure 2From: High electron mobility and low carrier concentration of hydrothermally grown ZnO thin films on seeded a-plane sapphire at low temperature FESEM images of the top view of ZnO structures after hydrothermal growth. Images (a-d) for the temperature of 70°C with molarities of 2, 20, 30, and 40 mM, respectively; (e-h) for the temperature of 80°C with molarities of 2, 20, 30, and 40 mM, respectively; and (i-l) for the temperature of 90°C with molarities of 2, 20, 30, and 40 mM, respectively.Back to article page