Jump to main content
Jump to site search

Issue 46, 2013
Previous Article Next Article

Dichotomic aging behaviour in a colloidal glass

Author affiliations


An unexpected dichotomic long time aging behaviour is observed in a glassy colloidal clay suspension investigated by X-ray photon correlation spectroscopy and dynamic light scattering. In the long time aging regime the intensity autocorrelations are non-exponential, following the Kohlrausch–Williams–Watts functional form with an exponent βQ. We show that for spontaneously aged samples a stretched behaviour (βQ < 1) is always found. Surprisingly a compressed exponent (βQ > 1) appears only when the system is rejuvenated by application of a shear field. In both cases the relaxation times scale as Q−1. These observations shed light on the origin of compressed exponential behaviour and help in classifying previous results in the literature on anomalous dynamics.

Graphical abstract: Dichotomic aging behaviour in a colloidal glass

Back to tab navigation

Publication details

The article was received on 08 May 2013, accepted on 13 Sep 2013 and first published on 25 Sep 2013

Article type: Communication
DOI: 10.1039/C3SM52173G
Citation: Soft Matter, 2013,9, 10955-10959
  •   Request permissions

    Dichotomic aging behaviour in a colloidal glass

    R. Angelini, L. Zulian, A. Fluerasu, A. Madsen, G. Ruocco and B. Ruzicka, Soft Matter, 2013, 9, 10955
    DOI: 10.1039/C3SM52173G

Search articles by author