The structure and size of the biosynthesised ZnO NP, was investigated under transmission electron microscopy. Most of the nanoparticles were under the 100 nm range in all 3 dimensions. Most particles had the average crystallite size of 40 nm to 60 nm, with occasional nanoparticles reaching crystallite sizes as low as 18nm, as seen in Fig. .1. The TEM showcased that most of the nanoparticles were an agglomerated sponge-like asymmetrical shape. This type of shape was typically recognised in oxides generated by solution combustion . The agglomerated sponge-like asymmetrical shape of the nanoparticles is expected to enhance their surface area, potentially improving their antibacterial efficacy compared to more uniform structures.