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@ARTICLE{Abade:21654,
      author       = {Abade, G.C. and Cichocki, B. and Ekiel-Jezewska, M.L. and
                      Nägele, G. and Wajnryb, E.},
      title        = {{D}iffusion, sedimentation, and rheology of concentrated
                      suspensions of core-shell particles},
      journal      = {The journal of chemical physics},
      volume       = {136},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-21654},
      pages        = {104902},
      year         = {2012},
      note         = {The work of G.C.A. was supported by CAPES
                      Foundation/Ministry of Education of Brazil. M.L.E.J. and
                      E.W. were supported in part by the Polish Ministry of
                      Science and Higher Education Grant No. N501 156538. G.N.
                      thanks M. Heinen for helpful discussions and the Deutsche
                      Forschungsgemeinschaft (SFB-TR6, project B2) for financial
                      support. Numerical simulations were done at NACAD-COPPE/UFRJ
                      in Rio de Janeiro, Brazil, and at the Academic Computer
                      Center in Gdansk, Poland.},
      abstract     = {Short-time dynamic properties of concentrated suspensions
                      of colloidal core-shell particles are studied using a
                      precise force multipole method which accounts for
                      many-particle hydrodynamic interactions. A core-shell
                      particle is composed of a rigid, spherical dry core of
                      radius a surrounded by a uniformly permeable shell of outer
                      radius b and hydrodynamic penetration depth κ(-1). The
                      solvent flow inside the permeable shell is described by the
                      Brinkman-Debye-Bueche equation, and outside the particles by
                      the Stokes equation. The particles are assumed to interact
                      non-hydrodynamically by a hard-sphere no-overlap potential
                      of radius b. Numerical results are presented for the
                      high-frequency shear viscosity, η(∞), sedimentation
                      coefficient, K, and the short-time translational and
                      rotational self-diffusion coefficients, D(t) and D(r). The
                      simulation results cover the full three-parametric
                      fluid-phase space of the composite particle model, with the
                      volume fraction extending up to 0.45, and the whole range of
                      values for κb, and a/b. Many-particle hydrodynamic
                      interaction effects on the transport properties are
                      explored, and the hydrodynamic influence of the core in
                      concentrated systems is discussed. Our simulation results
                      show that for thin or hardly permeable shells, the
                      core-shell systems can be approximated neither by no-shell
                      nor by no-core models. However, one of our findings is that
                      for κ(b - a) ≳ 5, the core is practically not sensed any
                      more by the weakly penetrating fluid. This result is
                      explained using an asymptotic analysis of the scattering
                      coefficients entering into the multipole method of solving
                      the Stokes equations. We show that in most cases, the
                      influence of the core grows only weakly with increasing
                      concentration.},
      keywords     = {Colloids: chemistry / Computer Simulation / Diffusion /
                      Hydrodynamics / Models, Chemical / Particle Size / Rheology
                      / Solvents: chemistry / Surface Properties / Colloids (NLM
                      Chemicals) / Solvents (NLM Chemicals) / J (WoSType)},
      cin          = {ICS-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung},
      pid          = {G:(DE-Juel1)FUEK505},
      shelfmark    = {Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22423856},
      UT           = {WOS:000301664600036},
      doi          = {10.1063/1.3689322},
      url          = {https://juser.fz-juelich.de/record/21654},
}