Neutron scattering from fractals

Jørgen Kjems, T. Freltoft, D. Richter, S. K. Sinha

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The scattering formalism for fractal structures is presented. Volume fractals are exemplified by silica particle clusters formed either from colloidal suspensions or by flame hydrolysis. The determination of the fractional dimensionality through scattering experiments is reviewed, and recent small-angle neutron scattering studies of the variation with aggregation rate are presented. These results allow a very detailed comparison to be made with the theoretical scattering curves. Preliminary incoherent inelastic data on the low-frequency dynamics of hydroxylated silica particle aggregates show a clear deviation from a Debye spectrum and give the first experimental estimates for the spectral dimensionality.
    Original languageEnglish
    JournalPhysica A+B
    Volume136
    Issue number1-3
    Pages (from-to)285-290
    ISSN0378-4363
    Publication statusPublished - 1986

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