Aging behavior of the localization length in a colloidal glass

[Display omitted] •X-ray photon correlation measurements in Laponite glassy samples.•Debye–Waller analysis of the non-ergodicity parameter.•Determination of the localization length associated with the fast relaxation.•Different localization length behavior in spontaneously aged and rejuvenated sampl...

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Bibliographic Details
Published inColloids and surfaces. A, Physicochemical and engineering aspects Vol. 460; pp. 118 - 122
Main Authors Angelini, R., Madsen, A., Fluerasu, A., Ruocco, G., Ruzicka, B.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 20.10.2014
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Summary:[Display omitted] •X-ray photon correlation measurements in Laponite glassy samples.•Debye–Waller analysis of the non-ergodicity parameter.•Determination of the localization length associated with the fast relaxation.•Different localization length behavior in spontaneously aged and rejuvenated samples.•Comparison between calculated and measured shear modulus. The localization length rloc associated with a fast secondary relaxation in glassy Laponite is determined by X-ray photon correlation spectroscopy (XPCS) through a Debye–Waller fit of the non-ergodicity parameter. Quantitative differences are observed between the time dependence (aging) of rloc in spontaneously aged and rejuvenated samples. This behavior is also reflected in the calculated shear modulus which matches well with data obtained by rheological measurements.
ISSN:0927-7757
1873-4359
DOI:10.1016/j.colsurfa.2014.03.087