Fig. 3: Atomic structure of the nitrogene-like structure on the Ag(100) surface.
From: Evidence of a two-dimensional nitrogen crystalline structure on silver surfaces
a, b Side view of nitrogene on Ag(100). Nitrogen atoms are colored according to their height for clarity. A buffer layer with a stoichiometric composition of AgN exists between the nitrogene layer and the Ag(100) substrate. c (Left to right) Top view of the structural model, experimental STM image (V = 1 V, I = 100 pA), and simulated STM image by the density functional theory (DFT). Bright protrusions in the STM images correspond to the topmost nitrogen atoms in the structural model, highlighted in red. d X-ray photoelectron spectroscopy (XPS) spectra of the nitrogene-like structure grown on Ag(100) (blue) and pristine Ag(100) (red). e Difference spectrum obtained by subtracting the pristine Ag(100) signal (red) from the nitrogen/Ag(100) spectrum (blue) shown in panel d.
