Figure 3
(a, b, c) SEM image, XRD pattern and AFM image of as-prepared AgNPs on sapphire, respectively. The Ag(111) peak indicates that AgNPs are compact Ag nano-crystals. (d, e, f) SEM image, XRD pattern and AFM image of the AgNPs after exposure to hard X-rays in oxygen. The disappearance of the Ag(111) and irregular shape indicated that AgNPs were oxidized. |