Fig. 2. Spherical-shaped structures in the low (a) and high (b) magnification FESEM images of SiNPs, respectively. TEM (c) and HR-TEM (d) images showing the general morphology of the prepared NPs and their fringe distance between two lattices (∼0.233 nm). AFM images of prepared SiNPs. General topographical image (e) and (f) the distance between particles, which is ∼20 nm, (horizontal, vertical and surface distances).
