TEM images along with EDX of pure ZnO, ZnO@SiO2, (ZnO@mSiO2
ZnO@SiO2@mSiO2 are given in Fig. 4a–g. TEM image of pure zinc oxide
shows different bar sizes of hexagonal shape of 20–70 nm length and
15–30 nm width (Fig. 4a). The TEM-EDX of ZnO nanomaterial shows
only zinc and oxygen peaks with no silicon is present (Fig. 4b). Fig. 4c
& d illustrates low and high resolution TEM images of ZnO@mSiO2 microspheres
of 300 nm diameter. The meso silica microsphere was evident
from the gray wormlike structure with zinc oxide appearing as
dark nanoparticles (dark color) which were capsulated into silica