Investigation of self-assembled fractal porous-silica over a wide range of length scales using a combined small-angle scattering method

D. Yamaguchi (), H. Mayama, S. Koizumi, K. Tsujii and T. Hashimoto

The European Physical Journal B: Condensed Matter and Complex Systems, 2008, vol. 63, issue 2, 153-163

Abstract: The unique structure of a set of self-assembled porous silica materials was characterized through a combined small-angle scattering (CSAS) method using small- and ultra-small angle neutron scattering as well as small-angle X-ray scattering. The porous silica specimens investigated were prepared by a sol-gel method under the presence of alkylketene dimer (AKD) template particles and through calcination, which leads to the development of porous silica having a mass-fractal structure over length scales from ~ 100 nm to ~ 10 μm. Furthermore, the specimens posses a hierarchical structure, which consist of a fractal porous structure, and also contain primary silica particles less than 10 nm in size, which form a continuous silica matrix. To characterize these complex structures, observation over a broad range of length scales is indispensable. We propose a CSAS technique that serves this purpose well. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2008

Keywords: 61.05.fg Neutron scattering (including small-angle scattering), 61.43.Gt Powders, porous materials, 61.43.Hv Fractals; macroscopic aggregates (including diffusion-limited aggregates), (search for similar items in EconPapers)
Date: 2008
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DOI: 10.1140/epjb/e2008-00223-9

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