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TEM images of Cu/Ce-Ln (Ln: Gd, La, Pr, Nd, Sm) samples. Cu/Ce-Gd: dark-field (a) and bright field (b) images; Cu/Ce-La: dark-field (c) and bright field (d) images; Cu/Ce-Pr dark-field (e) and bright field (f) images and Cu/Ce-Nd dark-field (g) and bright field (h) images.
