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Arrested state of clay-water suspensions: Gel or glass? (Articolo in rivista)

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Arrested state of clay-water suspensions: Gel or glass? (Articolo in rivista) (literal)

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Ruzicka, B; Zulian, L; Angelini, R; Sztucki, M; Moussaid, A; Ruocco, G (2008)
Arrested state of clay-water suspensions: Gel or glass?
in Physical review. E, Statistical, nonlinear, and soft matter physics (Print)
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Ruzicka, B; Zulian, L; Angelini, R; Sztucki, M; Moussaid, A; Ruocco, G (literal)

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\"[Ruzicka, B.; Zulian, L.; Angelini, R.; Ruocco, G.] CNR, INFM, SOFT, I-00185 Rome, Italy; [Ruzicka, B.; Zulian, L.; Angelini, R.; Ruocco, G.] Univ Roma La Sapienza, I-00185 Rome, Italy; [Sztucki, M.; Moussaid, A.] European Synchrotron Radiat Facil, F-38043 Grenoble, France (literal)

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The aging of a charged colloidal system has been studied by small-angle x-ray scattering, in the exchanged momentum range Q=0.03-5 nm(-1), and by dynamic light scattering, at different clay concentrations (C-w=0.6-2.8 %). The static structure factor S(Q) has been determined as a function of both aging time and concentration. This is the direct experimental evidence of the existence and evolution with aging time of two different arrested states in a single system simply obtained only by changing its volume fraction: an inhomogeneous state is reached at low concentrations, while a homogeneous one is found at high concentrations. (literal)

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