On the morphology and surface geometry of Vycor

A Vycor porous glass is examined by adsorption of H 2O/D 2O as well as CH 2Br 2 in conjunction with small-angle scattering of neutrons and X-rays, respectively. For dry samples, the data indicates a fractal surface with a fractal dimension D ∼ 2.6. After the deposition of an adsorbed film, defractal...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1997-06, Vol.234, p.402-404
Main Authors: Katsaros, F., Makri, P., Mitropoulos, A., Kanellopoulos, N., Keiderling, U., Wiedenmann, A.
Format: Article
Language:English
Subjects:
Contrast matching
Defractalization
Porous glass
Small-angle neutron scattering
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Summary:A Vycor porous glass is examined by adsorption of H 2O/D 2O as well as CH 2Br 2 in conjunction with small-angle scattering of neutrons and X-rays, respectively. For dry samples, the data indicates a fractal surface with a fractal dimension D ∼ 2.6. After the deposition of an adsorbed film, defractalization is observed. However, this procedure is different for H 2O and CH 2Br 2. It is suggested that H 2O yields a soft hydrogel on the Vycor surface. Theoretical considerations on the morphology of the pore structure as well as the surface geometry are given in terms of two-dimensional fractal configurations.
ISSN:0921-4526
1873-2135
DOI:10.1016/S0921-4526(96)01043-5