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@ARTICLE{Willner:11980,
      author       = {Willner, L. and Lund, R. and Monkenbusch, M. and Holderer,
                      O. and Colmenero, J. and Richter, D.},
      title        = {{P}olymer dynamics under soft confinement in a
                      self-assembled system},
      journal      = {Soft matter},
      volume       = {6},
      issn         = {1744-683X},
      address      = {Cambridge},
      publisher    = {Royal Society of Chemistry (RSC)},
      reportid     = {PreJuSER-11980},
      pages        = {1559 - 1570},
      year         = {2010},
      note         = {The authors acknowledge the SoftComp Network of Excellence
                      (NoE) program for support. The Basque Country Government
                      (IT-436-07) and the Spanish Ministry of Education and
                      Science (MAT 2007-63681) Consolider/Spanish Ministry of
                      Education and Science are also gratefully acknowledged. We
                      are also thankful to Dr Angel Moreno for many stimulating
                      discussions and Dr Aurel Radulescu and Dr Marie-Sousai
                      Appavou for assistance during the SANS experiments.},
      abstract     = {Block copolymers that self-assemble into nano-structured
                      melts provide an interesting template for soft confinement.
                      An important question that arises is how the chain dynamics
                      is affected in such self-assembled systems. Here we consider
                      a system composed of poly(isoprene)-b-poly(dimethyl
                      siloxane) (PI6-PDMS30, where the numbers indicate the
                      molecular weight in kg mole(-1)) having a large asymmetry
                      where the minor PI component block constitutes $19\%$ of the
                      total molecular weight. As shown by small angle neutron
                      scattering (SANS), the system forms hexagonally ordered
                      cylindrical structures composed of a PI phase (with a
                      cylinder radius of about 6.4 nm) in a continuous PDMS
                      matrix. Here we demonstrate using neutron spin-echo
                      spectroscopy and careful H/D contrast matching schemes how
                      the dynamics of single polymer chains (single chain
                      contrast) and the interfacial dynamics of the domains can be
                      resolved independently. This is achieved in the former
                      "single chain contrast'' case by matching out the net domain
                      scattering leaving only the intra chain coherent structure
                      factor visible. In the latter "bulk contrast'' case, the
                      protonated (h) PI and deuterated (d) PDMS domains are
                      visible and most of the contrast comes from the small
                      interfacial layer where h-PI/d-PDMS segments are intermixed
                      and give rise to a significant contrast by which the
                      fluctuations can be observed. Combining the results from the
                      two contrast conditions, we show that the dynamics can be
                      consistently described in terms of Rouse motion modified by
                      the surface fluctuation and laterally restricted to 2D
                      surface diffusion. Surprisingly, the fluctuations of the
                      interface significantly contribute to the dynamics and the
                      interfacial tension drives the fluctuations of a sizeable
                      portion of the polymer chains while the dynamics is similar
                      to Rouse motion.},
      keywords     = {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)J-NSE-20140101 / EXP:(DE-MLZ)KWS2-20140101},
      shelfmark    = {Chemistry, Physical / Materials Science, Multidisciplinary
                      / Physics, Multidisciplinary / Polymer Science},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000275947800026},
      doi          = {10.1039/b922649d},
      url          = {https://juser.fz-juelich.de/record/11980},
}