Figure 1
Some small angle X-ray scattering curves of Vycor loaded with CH2Br2 at various relative pressures on both adsorption and desorption.
Curve 0 at p/po = 0 (dry sample); curve 1 at (p/po)des = 0.54; curve 2 at (p/po)des = 0.49; curve 3 at (p/po)ads = 0.67; and curve 4 at (p/po)ads = 0.77. Notice that in curve 1 the sharp increase of the scattered intensity at low Q is well above the spinodal peak of curve 0; other curves are included for comparison reasons only. The insert shows the adsorption isotherm of CH2Br2 on Vycor at 293 K. The relative pressure corresponding to curve 1 is indicated at the onset of the desorption process.
