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SEM images of ZnO-250 (a), ZnO:20%Zn (b) and ZnO-900 samples (c). TEM micrographs of ZnO-250 (d), (e). Inset in (e) is the corresponding FFT. Spots and [100] zone axis were identified with the stoechiometric ZnO structure (ICSD file: 162843). (f) Top: simulated image (thickness 3.25 nm, defocus 30 nm), bottom: experimental micrograph.
