Figure 1: Ar trapping in the silica bilayer.
From: Immobilization of single argon atoms in nano-cages of two-dimensional zeolite model systems
XPS core level spectra of (a) pressure dependent Ar 2p, (b) angle dependent Ar 2p, (c) temperature dependent Ar 2p. (d) Schematic illustration of the trapped Ar atoms in the bilayer silica/Ru(0001). Colour code: Si (yellow), O in silica films (red), O chemisorbed on Ru(0001) (pink), Ru (silver) and Ar (cyan). (e) IRRA spectra of as-prepared silica bilayer and Ar-containing silica bilayer. The black spectrum in a is obtained in UHV prior to the Ar exposure, while the dark blue spectra in (a) and (b) are obtained in UHV after the Ar exposure. (Photon energy, hv=1000, eV; photoelectron emission angle, θ=20°).
