Fig. 1: Synthesis and structural characterizations of CuN4/CoN4@NC.
From: Atomic design of dual-metal hetero-single-atoms for high-efficiency synthesis of natural flavones
a Schematic illustration of the synthesis strategy. b, c SEM, d TEM, e HAADF-STEM and corresponding elemental mapping, and f AC HAADF-STEM image. g 3D reconstruction of a CuN4/CoN4@NC particle by HRTEM electron tomography. h, i DPC-STEM images.
