Figure 3: Synchrotron radiation XAFS measurements.

(a) Ce L₃-edge extended XAFS oscillation function k²χ(k), (b) the corresponding Fourier transforms FT (k²χ(k)), (c) the calculated densities of states for the ultrathin CeO₂ sheets with numerous surface pits, ultrathin CeO₂ sheets and bulk CeO₂, respectively. a.u., arbitrary unit.