1412 Fig. 2 TEM images to synthesis of SiO2 obtained with bioprocess (a–f) and without bioprocess (g–h). Figure 2 shows differences in size, form and dispersity to nanoparticles synthesized for both methods employed, with bioprocess (a–f) and without bioprocess (g–h) 123 Nanoscale Res Lett (2010) 5:1408–1417