Figure 4. Characterizations of the oxide nanosheets.
(a) SEM, (b) TEM (inset, corresponding electron diffraction pattern) and (c) AFM characterizations of the ZrO2 nanosheets. (d) SEM, (e) TEM (inset, corresponding electron diffraction pattern) and (f) AFM characterizations of the Al2O3 nanosheets. (g) SEM, (h) TEM (inset, corresponding electron diffraction pattern) and (i) AFM characterizations of the Y2O3 nanosheets. Scale bars, 2 μm (a,d,g), 500 nm (b,e) and 50 nm (h).