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Title: Dynamic Arrest in Charged Colloidal Systems Exhibiting Large-Scale Structural Heterogeneities

Suspensions of charged liposomes are found to exhibit typical features of strongly repulsive fluid systems at short length scales, while exhibiting structural heterogeneities at larger length scales that are characteristic of attractive systems. We model the static structure factor of these systems using effective pair interaction potentials composed of a long-range attraction and a shorter range repulsion. Our modeling of the static structure yields conditions for dynamically arrested states at larger volume fractions, which we find to agree with the experimentally observed dynamics.
Authors:
; ;  [1] ;  [2] ;  [3] ;  [4] ;  [5]
  1. Grupo de Fisica de Fluidos y Biocoloides, Departamento de Fisica Aplicada, Universidad de Granada, 18071 Granada (Spain)
  2. Departamento de Fisica, Cinvestav-IPN, 07360 Mexico Distrito Federal (Mexico)
  3. Instituto de Fisica, Universidad de Guanajuato, 37150 Leon (Mexico)
  4. Departamento de Fisica, Escuela Politecnica Superior de Linares, Universidad de Jaen, 23700 Linares (Spain)
  5. Departement de Physique, Universite de Fribourg, 1700 Fribourg (Switzerland)
Publication Date:
OSTI Identifier:
21180107
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 102; Journal Issue: 1; Other Information: DOI: 10.1103/PhysRevLett.102.018301; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; FLUIDS; LIPOSOMES; PAIRING INTERACTIONS; POTENTIALS; SIMULATION; STRUCTURE FACTORS; SUSPENSIONS