Figure 1

TEM images (a, b, c and e) of CuO@SiO2. Also shown are EDX mapping results (d, h) of CuO@SiO2 and Line scanning profiles (j, k) of recorded along the line of the CuO@SiO2 in image (i).
TEM images (a, b, c and e) of CuO@SiO2. Also shown are EDX mapping results (d, h) of CuO@SiO2 and Line scanning profiles (j, k) of recorded along the line of the CuO@SiO2 in image (i).