The Surface Geometry of Vycor
The interface geometry of Vycor porous glass was examined by adsorption of water in conjunction with small-angle scattering of X rays and neutrons. When the sample is dry, a fractal surface with a fractal dimension D approximately 2.5 was detected. When wet, a soft hydrogel is formed, resulting in a diffuse boundary. To observe a fractal surface, thorough drying of the sample is necessary, however. It was shown that a small amount of water, 3% w/w, is sufficient to render the surface smooth. Copyright 1997Academic Press
Mitropoulos
AC
Institute of Physical Chemistry, National Center for Scientific Research "Demokritos", 153 10 Ag. Paraskevi Attikis, Greece
Makri
PK
Kanellopoulos
NK
Keiderling
U
Wiedenmann
A