Figure 3. Transmission Electron Microscopic image of Fly-ash powder(A), bioleached silica nanoparticles obtained after reacting Fly-ash with Fusarium oxysporum for 24 h(B) inset shows selected area electron diffraction (SAED) analysis of bioleached silica nanoparticles, particle size distribution analysis of bioleached silica nanoparticles(C) and HR-TEM image of bioleached silica nanoparticles (D).