Observation of empty liquids and equilibrium gels in a colloidal clay (Contributo in atti di convegno)

Type
Label
  • Observation of empty liquids and equilibrium gels in a colloidal clay (Contributo in atti di convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4794601 (literal)
Alternative label
  • R. Angelini (1); B. Ruzicka (1); E. Zaccarelli (2); L. Zulian (3); M. Sztucki (4); A. Moussaïd (4); T. Narayanan (4); F. Sciortino (2) (2013)
    Observation of empty liquids and equilibrium gels in a colloidal clay
    in 4th International Symposium on Slow Dynamics in Complex Systems: Keep Going Tohoku, Sendai, Japan, 2-7 December 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • R. Angelini (1); B. Ruzicka (1); E. Zaccarelli (2); L. Zulian (3); M. Sztucki (4); A. Moussaïd (4); T. Narayanan (4); F. Sciortino (2) (literal)
Pagina inizio
  • 384 (literal)
Pagina fine
  • 390 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://proceedings.aip.org/resource/2/apcpcs/1518/1/384_1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Slow Dynamics in Complex Systems: Keep Going Tohoku (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 1518 (literal)
Note
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • (1) CNR-IPCF and Dipartimento di Fisica,Università di Roma La Sapienza, P.le A. Moro 2, I-00185, Rome, Italy (2) CNR-ISC and Dipartimento di Fisica, Università di Roma La Sapienza, P.le A. Moro 2, I-00185, Rome, Italy (3) CNR-ISMAC via Bassini 15, 20133 Milan, Italy (4) European Synchrotron Radiation Facility, B.P. 220 F-38043 Grenoble Cedex, France (literal)
Titolo
  • Observation of empty liquids and equilibrium gels in a colloidal clay (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-0-7354-1141-8 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Michio Tokuyama, Irwin Oppenheim (literal)
Abstract
  • The observation of empty liquids and equilibrium gels in a complex colloidal clay has been obtained through dilution experiments, small angle x ray scattering measurements and extensive numerical simulations. We investigate the behaviour of dilute suspensions of a synthetic clay, Laponite, for low concentrations, Cw <= 1%, to waiting times significantly longer than those previously studied. A significant evolution takes place on the year timescale and samples undergo a clear phase separation process which terminates at a finite clay concentration Cw = 1%, above which they remain in a homogeneous arrested state. Moreover, the slow aging dynamics peculiar of Laponite suspensions drive an arrest transition through a very slow rearrangement, so that equilibrium gels are formed. The observed features are similar to those predicted in simple models of patchy particles, suggesting that Laponite forms an (arrested) empty liquid at very low concentrations. (literal)
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