Appearance of critical fluctuations in a binary fluid mixture confined in Vycor glass

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Abstract
We report here some of the results obtained through a small-angle neutron scattering experiment performed on a binary mixture absorbed inside Vycor porous glass. The aim of the experiment was to study the way the critical behaviour is modified when the mixture is spatially constrained to the random pore network of almost regular size (75 Å) characterizing the Vycor. The presence of concentration fluctuations inside the pores, the extent of which comes to exceed the mean pore size and increases more and more even below the bulk critical temperature, is observed.

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