Monolayer sorption of neon in mesoporous silica glass as monitored by   WAXS
  We report measurements of the x-ray scattering intensity as mesoporous glasses are filled with Neon. We outline a simple model to account for the non-linear increase in the intensity of the first peak in a liquid-like diffraction pattern as a monolayer is formed. This allows us to demonstrate an approach for surface area determination which does not rely on thermodynamic models, and is therefore complimentary to existing models. 
Duncan Kilburn and Paul E. Sokol