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@ARTICLE{Papagiannopoulos:9819,
      author       = {Papagiannopoulos, A. and Karayianni, M. and Mountrichas, G.
                      and Pispas, S. and Radulescu, A.},
      title        = {{S}elf-{A}ssembled {N}anoparticles from a {B}lock
                      {P}olyelectrolyte in {A}queous {M}edia: {S}tructural
                      {C}haracterization by {SANS}},
      journal      = {The journal of physical chemistry / B},
      volume       = {114},
      issn         = {1520-6106},
      address      = {Washington, DC},
      publisher    = {Soc.},
      reportid     = {PreJuSER-9819},
      pages        = {7482 - 7488},
      year         = {2010},
      note         = {The SANS experiments have been supported by the European
                      Commission under the seventh Framework Programme through the
                      Key Action: Strengthening the European Research Area,
                      Research Infrastructures. Contract No.: 226507 (NMI3). The
                      SANS work is based on experiments performed at the Mich
                      Centre for Neutron Science JCNS, Forschungszentrum Julich,
                      Germany.},
      abstract     = {We present a small angle neutron scattering (SANS) study of
                      polystyrene-b-sodium (sulfamate/carboxylate) isoprene
                      (PS-PSCI) nanoparticles in aqueous media. The SANS
                      experiments are complemented by static and dynamic light
                      scattering measurements. A detailed analysis of the
                      scattering form factor obtained by SANS for the
                      self-assembled block polyelectrolyte spherical nanoparticles
                      implies a two-region power-law model for the radial volume
                      fraction profiles. The theoretically predicted scaling of
                      the osmotic brush regime phi(r) approximately r(-2) for the
                      inner region and the osmotic annealing brush regime phi(r)
                      approximately r(-8/3) for the outer region are in agreement
                      with our experimental findings. A concentrated shell of PSCI
                      polyelectrolyte chains collapsed on the polystyrene core is
                      needed in the form factor analysis so that the aggregation
                      number of the nanoparticles is self-consistent. The
                      self-assembled nanoparticles are found to be kinetically
                      frozen i.e. their aggregation number is not sensitive to the
                      solution conditions and is defined by the preparation
                      protocol. The size of the spherical nanoparticles tends to
                      decrease upon the addition of salt and the drop of pH.},
      keywords     = {Butadienes: chemistry / Carboxylic Acids: chemistry /
                      Hemiterpenes: chemistry / Molecular Structure /
                      Nanoparticles: chemistry / Neutron Diffraction / Pentanes:
                      chemistry / Polystyrenes: chemistry / Scattering, Small
                      Angle / Water: chemistry / Butadienes (NLM Chemicals) /
                      Carboxylic Acids (NLM Chemicals) / Hemiterpenes (NLM
                      Chemicals) / Pentanes (NLM Chemicals) / Polystyrenes (NLM
                      Chemicals) / polystyrene sulfonic acid (NLM Chemicals) /
                      Water (NLM Chemicals) / isoprene (NLM Chemicals) / J
                      (WoSType)},
      cin          = {IFF-4 / IFF-5 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB784 / I:(DE-Juel1)VDB785 /
                      I:(DE-Juel1)JCNS-20121112},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung / Großgeräte für die Forschung
                      mit Photonen, Neutronen und Ionen (PNI)},
      pid          = {G:(DE-Juel1)FUEK505 / G:(DE-Juel1)FUEK415},
      experiment   = {EXP:(DE-MLZ)KWS2-20140101},
      shelfmark    = {Chemistry, Physical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:20481490},
      UT           = {WOS:000278301000008},
      doi          = {10.1021/jp1009912},
      url          = {https://juser.fz-juelich.de/record/9819},
}