Surface Fractal Characteristics of Silica Aerogels

Internal surface structure of 13 samples of base-catalyzed silica aerogels synthesized using different reactant concentrations (TEOS, H2O) was investigated by means of small-angle X-ray scattering (SAXS) and N2 adsorption. Both SAXS and Frankel−Halsey−Hill plots of adsorption isotherms, interpreted...

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Published in:Langmuir 1997-03, Vol.13 (5), p.1280-1285
Main Authors: Jarzȩbski, Andrzej B, Lorenc, Jarosław, Paja̧k, Lucjan
Format: Article
Language:English
Subjects:
Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
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description Internal surface structure of 13 samples of base-catalyzed silica aerogels synthesized using different reactant concentrations (TEOS, H2O) was investigated by means of small-angle X-ray scattering (SAXS) and N2 adsorption. Both SAXS and Frankel−Halsey−Hill plots of adsorption isotherms, interpreted in terms of equations of Pfeifer and co-workers, consistently show fractally rough surface structure for aerogels obtained from the low water content procedure and fractally smooth surface of those obtained with overstoichiometric water content.
doi_str_mv 10.1021/la960011z
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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects Chemistry
Colloidal gels. Colloidal sols
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
title Surface Fractal Characteristics of Silica Aerogels
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