Structure and self-similarity of silica aerogels
- 15 April 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 37 (11), 6500-6503
- https://doi.org/10.1103/physrevb.37.6500
Abstract
Small-angle neutron scattering from silica aerogels reveals that they form mutually self-similar volume fractals for a wide range of densities and preparations. The fractal dimension is D=2.40±0.03. The fractal behavior extends down to near-molecular sizes. Indication for a volume-to-surface fractal crossover is also obtained. These results apply to neutrally prepared or acid-catalyzed materials. Base-catalyzed gels have widely different properties.Keywords
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