Abstract
The broadening of the oxygen absorption line P9P9 due to wall collisions of entrapped oxygen gas in nanoporous solid discs of average pore diameters between 70 and 150 nm is studied using GAs in Scattering Media Absorption Spectroscopy (GASMAS) method. A model based on the kinetic theory of gasses is used to find a correlation between the wall-collision broadening and the average pore diameter measured by Mercury Intrusion Porosimetry (MIP). The shape of the pores of investigated samples is found to be more consistent with a model of pores of cylindrical shapes of heights much larger than their diameters.
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