2005/09/09 by B. Ruzicka, Barbara Ruzicka, Laura Zulian +6
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Clay minerals and soil interactions #Electrostatics and Colloid Interactions #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Soft Condensed Matter (cond-mat.soft) #Soil and Unsaturated Flow #cond-mat.mtrl-sci #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0509235
16 pages, 5 figures, submitted to Langmuir
arxiv created 2005/09/09 · openalex publication_date 2005/09/09 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The phase diagram of a charged colloidal system (Laponite) has been investigated by dynamic light scattering in a previously unexplored range of salt and clay concentrations. Specifically the clay weight and salt molar concentrations have been varied in the ranges Cw=0.004- 0.025, Cs=(1x 10-3- 5x 10-3) M respectively. As in the case of free salt water samples (Cs= 1x 10-4 M) an aging dynamics towards two different arrested phases is found in the whole examined Cw and Cs range. Moreover a transition between these two different regimes is found for each investigated salt concentration. It is clear from these measurements that a revision of the phase diagram is necessary and a new "transition" line between two different arrested states is drawn.