The sorption capacity of solid rare gas layers

Morphology of Frozen Rare‐Gas Layers

“…The direct measurement of the porosity of frozen gas layers has been conducted for the first time. It confirms the conclusions drawn from the results of previous optical density studies of frozen Ar layers9 and their adsorption capacity for H 2 8 (see Figure 5 d). The qualitative agreement with the data obtained in our experiments is obvious.…”

“…This is true as well for Ar, Kr and Xe at higher condensation temperatures. The independence of the morphology on the layer thickness has already been established in previous solid rare gas matrix studies performed by XRD,4–7 sorption8 and optical density9 methods.…”

“…The sorption measurements indicated higher porosity of the matrices produced at temperatures below 20 K. At the same time the sorption ability was found to be practically independent of the layer thickness. Thus, it can be concluded that Ar films grow homogeneously, that is, with almost identical film structures at the top and the bottom, up to 100 μm thickness 8. Measurements of the optical density of Ar layers confirm indirectly these conclusions: at deposition temperatures below 20 K a density change has been found.…”

“… Average pore size (a), their density on the surface (b) and porosity (c) of 2500 nm thick solid Ar layers versus preparation temperature. Literature data on adsorption capacities (▾) 8 and optical densities ( + ) 9 are presented in (d). …”

Formation of Light‐Emitting Ag2 and Ag3 Species in the Course of Condensation of Ag Atoms with Ar

“…Therefore the signal-to-noise ratio (SNR) of the stochastic oscillation passes through a clear maximum with varying system size, that is, an ™optimal system size for mesoscopic chemical oscillation∫. Note that this effect is quite different in nature from the recently reported phenomenon of ™system size resonance∫, [9] in which the collective linear response of an array of coupled noisy elements to small periodic forces has a maximum for a certain intermediate number of elements. Similar optimal-size effects to that discussed here were also found in the study of collective spiking activities of assemblies of ion channels.…”