title: Arrested state of clay-water suspensions: gel or glass?
abstract: 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.
authors: SOFT INFM-CNR and Dipartimento di Fisica, Università di Roma La Sapienza, Rome, Italy.
authors: B
authors: B
authors: Ruzicka
authors: L
authors: L
authors: Zulian
authors: R
authors: R
authors: Angelini
authors: M
authors: M
authors: Sztucki
authors: A
authors: A
authors: Moussaïd
authors: G
authors: G
authors: Ruocco