% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@ARTICLE{Pamvouxoglou:867754,
      author       = {Pamvouxoglou, Andreas and Bogri, Panagiota and Nägele,
                      Gerhard and Ohno, Kohji and Petekidis, George},
      title        = {{S}tructure and dynamics in suspensions of soft core-shell
                      colloids in the fluid regime},
      journal      = {The journal of chemical physics},
      volume       = {151},
      number       = {2},
      issn         = {1089-7690},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2019-06369},
      pages        = {024901 -},
      year         = {2019},
      abstract     = {We report on a detailed experimental study of the structure
                      and short-time dynamics in fluid-regime suspensions of soft
                      core-shell sphericalparticles with different molecular
                      weights of the chains forming the soft outer shell, and
                      therefore different degrees of particle softness,using 3D
                      dynamic light scattering (3D-DLS). Owing to the particle
                      softness, the liquid-crystal coexistence regime is found to
                      be broader thanthat of hard-sphere (HS) suspensions. Static
                      light scattering in the dilute regime yields form factors
                      that can be described using a sphericalcore-shell model and
                      second virial coefficients A2 > 0 indicative of purely
                      repulsive interactions. The particle-particle interactions
                      are longerranged for all considered systems except those of
                      the smaller molecular weight chain grafted particles which
                      show a HS-like behavior. 3D-DLSexperiments in the
                      concentrated regime up to the liquid-crystal transition
                      provide the short-time diffusion function, D(q), in a broad
                      range ofscattering wavenumbers, q, from which the structural
                      (cage) and short-time self-diffusion coefficients D(qm) and
                      DS = D(q≫qm), respectively,are deduced as functions of the
                      effective particle volume fraction, ϕ = c/c∗, where c∗
                      is the overlap concentration, calculated using the
                      hydrodynamicparticle radius, RH. The size of the
                      nearest-neighbor cage of particles is characterized by
                      2π/qm, with D(q) and the static structurefactor S(q)
                      attaining at qm the smallest and largest values,
                      respectively. Experimental data of D(qm) and DS are
                      contrasted with analytic theoreticalpredictions based on a
                      simplifying hydrodynamic radius model where the internal
                      hydrodynamic structure of the core-shell particlesis mapped
                      on a single hydrodynamic radius parameter γ = RH/Reff , for
                      constant direct interactions characterized by an (effective)
                      hard-coreradius Reff . The particle softness is reflected,
                      in particular, in the corresponding shape of the static
                      structure factor, while the mean solvent(Darcy) permeability
                      of the particles related to γ is reflected in the dynamic
                      properties only. For grafted particles with longer polymer
                      chains,D(qm) and DS are indicative of larger permeability
                      values while particles with shorter chains are practically
                      nonpermeable. The particle softnessis also evident in the
                      effective random close packing fraction estimated from the
                      extrapolated zero-value limit of the cage diffusion
                      coefficientD(qm).},
      cin          = {ICS-3},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551)},
      pid          = {G:(DE-HGF)POF3-551},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:31301719},
      UT           = {WOS:000486055700032},
      doi          = {10.1063/1.5091845},
      url          = {https://juser.fz-juelich.de/record/867754},
}