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@ARTICLE{Zinn:155366,
      author       = {Zinn, Thomas and Willner, Lutz and Lund, Reidar and Pipich,
                      Vitaliy and Appavou, Marie-Sousai and Richter, Dieter},
      title        = {{S}urfactant or block copolymer micelles? {S}tructural
                      properties of a series of well-defined n-alkyl–{PEO}
                      micelles in water studied by {SANS}},
      journal      = {Soft matter},
      volume       = {10},
      number       = {28},
      issn         = {1744-6848},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {FZJ-2014-04535},
      pages        = {5212},
      year         = {2014},
      abstract     = {Here we present an extensive small-angle neutron scattering
                      (SANS) structural characterization of micelles formed by
                      poly(ethylene oxide)-mono-n-alkyl ethers (Cn–PEOx) in
                      dilute aqueous solution. Chemically, Cn–PEOx can be
                      considered as a hybrid between a low-molecular weight
                      surfactant and an amphiphilic block copolymer. The present
                      system, prepared through anionic polymerization techniques,
                      is better defined than other commercially available polymers
                      and allows a very precise and systematic testing of the
                      theoretical predictions from thermodynamical models. The
                      equilibrium micellar properties were elaborated by
                      systematically varying the n-alkyl chain length (n) at
                      constant PEO molecular weight or increasing the soluble
                      block size (x), respectively. The structure was reminiscent
                      of typical spherical star-like micelles i.e. a constant core
                      density profile, [similar]r0, and a diffuse corona density
                      profile, [similar]r−4/3. Through a careful quantitative
                      analysis of the scattering data, it is found that the
                      aggregation number, Nagg initially rapidly decreases with
                      increasing PEO length until it becomes independent at higher
                      PEO molecular weight as expected for star-like micelles. On
                      the other hand, the dependency on the n-alkyl length is
                      significantly stronger than that expected from the theories
                      for star-like block copolymer micelles, Nagg [similar] n2
                      similar to what is expected for surfactant micelles. Hence
                      the observed aggregation behavior suggests that the
                      Cn–PEOx micelles exhibit a behavior that can be considered
                      as a hybrid between low-molecular weight surfactant micelles
                      and diblock copolymer micelles.},
      cin          = {ICS-1 / Neutronenstreuung ; JCNS-1 / JCNS (München) ;
                      Jülich Centre for Neutron Science JCNS (München) ;
                      JCNS-FRM-II},
      ddc          = {530},
      cid          = {I:(DE-Juel1)ICS-1-20110106 / I:(DE-Juel1)JCNS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218},
      pnm          = {451 - Soft Matter Composites (POF2-451) / 54G - JCNS
                      (POF2-54G24)},
      pid          = {G:(DE-HGF)POF2-451 / G:(DE-HGF)POF2-54G24},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)KWS2-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000338644400019},
      doi          = {10.1039/c4sm00625a},
      url          = {https://juser.fz-juelich.de/record/155366},
}