Fig. 2: Atomic-scale interfacial structure.
From: Compositing effects for high thermoelectric performance of Cu2Se-based materials

The HAADF-STEM images show a overview of the phase interfaces. b, c Enlarged areas (b, c) for BPCCSO and Cu2Se-BPCCSO interface. d, e Intensity line profiles marked by the red and orange dashed arrows in b. f, g The diffractograms of BPCCSO and Cu2Se, respectively, which show the orientation relationship of the two phases.