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Fig. 3 | Advanced Structural and Chemical Imaging

Fig. 3

From: On the role of the gas environment, electron-dose-rate, and sample on the image resolution in transmission electron microscopy

Fig. 3

Location dependency of the image resolution. The displays show FFTs of images recorded from two different areas of the gold-on-carbon sample in 5 mbar N2 using a low areal dose-rate of 480 e/(Å2s). The images from area a are the same as used in Fig. 1, and the images from b were recorded from a distant area. The image resolution is denoted for each display and corresponds to the highest spatial frequency lattice fringes (indicated by a dashed circle). While the measured resolution at the low total dose-rate was equivalent for the two areas, the reduction in resolution at the higher total dose-rate was markedly smaller at area b than at area a. The contrast for a set of strong 220 lattice fringes (black box) is given as the intensity of the corresponding spot in each FFT relative to the intensity of such fringes in area b at low total dose-rate. The relative higher 220 intensity in a than in b at the low total dose-rate indicates that its disappearance at the higher dose-rate is not due to a signal limitation caused by the properties of the gold particles

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