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Understanding Liquid/Colloids Composites with Mesoscopic Simulations

  • Ignacio Pagonabarraga
Part of the NanoScience and Technology book series (NANO)

The study of complex fluids and soft materials contains a number of basic conceptual and practical challenges. The most basic difficulties are related to the fact that different length and time scales compete, making it impractical to carry out first principles modeling of these materials [1]. Colloidal particles are rigid molecular aggregates of sizes varying between a few nanometers and a micron. As a result, they are at least one order of magnitude larger than the molecules that characterize the solvent they are suspended in. Colloids move at smaller velocities than solvent molecules as a result of their size mismatch, and hence their characteristic time scales are also orders of magnitude larger than solvent ones. Moreover, colloid interactions also differ qualitatively from their molecular counterparts. Although they derive from the specific atomic interactions among the atoms that constitute the colloids, the fact that colloids are made of thousands of atoms implies that the effective strength is typically of a few times the characteristic thermal energy, kBT, at room temperature, with kB referring to the Boltzmann constant [2].

Keywords

Colloidal Particle Colloidal Suspension Spinodal Decomposition Lattice Boltzmann American Physical Society 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Canopus Publishing Limited 2007

Authors and Affiliations

  • Ignacio Pagonabarraga
    • 1
  1. 1.Departament de Física FonamentalUniversitat de BarcelonaSpain

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