Small-angle neutron scattering study of adsorbed water in porous Vycor glass: Supercooling phase transition and interfacial structure

Journal Article · Sun Jan 01 00:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.633· OSTI ID:6433852

Benham, M J; Cook, J C; Li, J; Ross, D K; Hall, P L; Sarkissian, B

Small-angle neutron scattering by porous Vycor glass at scattering vectors above 0.025 A/sup -1/ decays as Q/sup -//sup n/. However, both intensity and power-law exponent differ markedly between a dry sample, which has a fractally rough surface with dimensionality Dapprox.2.5, and a water-saturated sample with identical scattering contrast, implying that the pore surfaces undergo gross geometrical changes on drying. The temperature variation of intensity at constant Q confirms the existence of a diffuse supercooling transition centered at about 260 K.

• Research Organization: Department of Physics, University of Birmingham, P.O. Box 363, Birmingham B15 2TT, United Kingdom
• OSTI ID: 6433852
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:1
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HEAVY WATER
NEUTRON DIFFRACTION
VYCOR
WATER
ADSORPTION
EXPERIMENTAL DATA
ISOTOPE RATIO
MEDIUM TEMPERATURE
PHASE TRANSFORMATIONS
POROUS MATERIALS
SMALL ANGLE SCATTERING
COHERENT SCATTERING
DATA
DIFFRACTION
HYDROGEN COMPOUNDS
INFORMATION
MATERIALS
NUMERICAL DATA
OXYGEN COMPOUNDS
SCATTERING
SORPTION
656003* - Condensed Matter Physics- Interactions between Beams & Condensed Matter- (1987-)