More on the phase diagram of laponite

被引:119
作者
Ruzicka, B
Zulian, L
Ruocco, G
机构
[1] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[2] Univ Roma La Sapienza, INFM, CRS, SOFT, I-00185 Rome, Italy
[3] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy
关键词
D O I
10.1021/la0524418
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
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 C-w = 0.004 divided by 0.025 and C-s = (1 X 10(-3), 5 x 10(-3)) M, respectively. As in the case of free salt water samples (C, 1 x 10(-4) M), an aging dynamics toward two different arrested phases is found in the whole examined Cw and C, range. Moreover a transition between these two different regimes is found. 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.
引用
收藏
页码:1106 / 1111
页数:6
相关论文
共 23 条
[1]   Aging dynamics in a colloidal glass [J].
Abou, B. ;
Bonn, D. ;
Meunier, J. .
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, 2001, 64 (2 I) :215101-215106
[2]   Aging processes and scale dependence in soft glassy colloidal suspensions [J].
Bellour, M ;
Knaebel, A ;
Harden, JL ;
Lequeux, F ;
Munch, JP .
PHYSICAL REVIEW E, 2003, 67 (03) :8
[3]   Aging of a colloidal "Wigner" glass [J].
Bonn, D ;
Tanaka, H ;
Wegdam, G ;
Kellay, H ;
Meunier, J .
EUROPHYSICS LETTERS, 1999, 45 (01) :52-57
[4]  
CAPUANI S, 2005, PREPRINT
[5]   Observation of nematic liquid-crystal textures in aqueous gels of smectite clays [J].
Gabriel, JCP ;
Sanchez, C ;
Davidson, P .
JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (26) :11139-11143
[6]   Successive exponential and full aging regimes evidenced by tracer diffusion in a colloidal glass [J].
Kaloun, S ;
Skouri, R ;
Skouri, M ;
Munch, JP ;
Schosseler, F .
PHYSICAL REVIEW E, 2005, 72 (01)
[7]   Aging behavior of Laponite clay particle suspensions [J].
Knaebel, A ;
Bellour, M ;
Munch, JP ;
Viasnoff, V ;
Lequeux, F ;
Harden, JL .
EUROPHYSICS LETTERS, 2000, 52 (01) :73-79
[8]   Structure and formation of a gel of colloidal disks [J].
Kroon, M ;
Vos, WL ;
Wegdam, GH .
PHYSICAL REVIEW E, 1998, 57 (02) :1962-1970
[9]   Dynamic light scattering studies on the sol-gel transition of a suspension of anisotropic colloidal particles [J].
Kroon, M ;
Wegdam, GH ;
Sprik, R .
PHYSICAL REVIEW E, 1996, 54 (06) :6541-6550
[10]   Effective interaction of charged platelets in aqueous solution: Investigations of colloid laponite suspensions by static light scattering and small-angle x-ray scattering [J].
Li, L ;
Harnau, L ;
Rosenfeldt, S ;
Ballauff, M .
PHYSICAL REVIEW E, 2005, 72 (05)