Fig. 3: Structural characterizations of the samples.
From: Growing highly ordered Pt and Mn bimetallic single atomic layers over graphdiyne
a TEM and b HRTEM images of Pt0Mn0/GDY. c HAADF-STEM image of Pt0Mn0 on GDY. d The enlarged images of the marked regions in c showing the presence of atomic steps at the edge of Pt0Mn0 layers. Distinction of Pt and Mn atoms (red circle) in e HAADF-STEM image and f–h 3D transformation images (g, h are the enlarged images of the dashed dark and red square in f respectively). i Schematic representation of the XPS depth profiling analysis. j Pt 4 f, k Mn 2p and l C 1 s XPS spectra of Pt0Mn0/GDY recorded at different etching times (ET). m Illustration of the charge transfer between metal atoms and GDY.
