Figure 2From: Surfactant-free synthesis of Cu2O hollow spheres and their wavelength-dependent visible photocatalytic activities using LED lamps as cold light sourcesTEM and HRTEM images. TEM and HRTEM images of Cu2O hollow spheres prepared at 0°C (a, d), 25°C (b, e), and 50°C (c, f). The insets show the corresponding SAED patterns.Back to article page