Figure 2From: Use of titanium dioxide nanoparticles biosynthesized by Bacillus mycoides in quantum dot sensitized solar cells Transmission electron microscopy of TiO 2 nanoparticles synthesized by B. mycoides . Biosynthesized nanoparticles before (a) and after successive washings in water (b). The inset in (a) shows the spherical morphology of TiO2 nanoparticles. The inset in (b) shows the size distribution histogram of nanoparticles. Arrow heads indicate individual NPs. Images were obtained with a 100,000× magnification.Back to article page