Fig. 2: (111) interface and local strain in a free-standing CeO2/Y2O3 nanobristle.
From: Colossal oxygen vacancy formation at a fluorite-bixbyite interface
a, b HAADF images and c, d their corresponding LAADF images taken from the top and middle regions of a free-standing CeO2/Y2O3 nanobristle along the [110] direction. As indicated by the yellow dashed lines, the brighter contrast at the outer parts of the CeO2 sublayers in the LAADF images suggests locally enhanced lattice distortions due to the formation of oxygen vacancies. The scale bar corresponds to 5 nm. e Magnified HAADF image showing atomically abrupt interfaces and {111} Ce facets between CeO2 and Y2O3 layers. The scale bar corresponds to 2 nm. f Geometric phase analysis of the HAADF image shown in e reveals a lattice expansion of the outer parts of the CeO2 layers.
