Solvation forces between colloidal nanoparticles: Directed alignment

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Abstract

We study the solvation forces between colloidal nanoparticles in Lennard-Jones liquids using molecular-dynamics simulations. We find that due to the interplay between solvent ordering and surface structure, the solvation forces between two nanoparticles can vary between attraction and repulsion as the particles are rotated relative to one another at a fixed separation. These solvent-mediated forces tend to align the nanoparticles so that they rotate to approach one another in a solution via preferred pathways. This directed alignment could play a role in the assembly of macromolecules and nanoparticles in solution.

Original languageEnglish (US)
Article number020401
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume73
Issue number2
DOIs
StatePublished - Mar 2 2006

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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