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@ARTICLE{Mark:836208,
      author       = {Mark, C. and Holderer, O. and Allgaier, J. and Hübner, E.
                      and Pyckhout-Hintzen, W. and Zamponi, M. and Radulescu, A.
                      and Feoktystov, A. and Monkenbusch, M. and Jalarvo, N. and
                      Richter, D.},
      title        = {{P}olymer {C}hain {C}onformation and {D}ynamical
                      {C}onfinement in a {M}odel {O}ne-{C}omponent
                      {N}anocomposite},
      journal      = {Physical review letters},
      volume       = {119},
      number       = {4},
      issn         = {1079-7114},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {FZJ-2017-05329},
      pages        = {047801},
      year         = {2017},
      abstract     = {We report a neutron-scattering investigation on the
                      structure and dynamics of a single-component nanocomposite
                      based on SiO2 particles that were grafted with polyisoprene
                      chains at the entanglement limit. By skillful labeling, we
                      access both the monomer density in the corona as well as the
                      conformation of the grafted chains. While the corona profile
                      follows a r−1 power law, the conformation of a grafted
                      chain is identical to that of a chain in a reference melt,
                      implying a high mutual penetration of the coronas from
                      different particles. The brush crowding leads to topological
                      confinement of the chain dynamics: (i) At local scales, the
                      segmental dynamics is unchanged compared to the reference
                      melt, while (ii) at the scale of the chain, the dynamics
                      appears to be slowed down; (iii) by performing a mode
                      analysis in terms of end-fixed Rouse chains, the slower
                      dynamics is tracked to topological confinement within the
                      cone spanned by the adjacent grafts; (iv) by adding $50\%$
                      matrix chains, the topological confinement sensed by the
                      grafted chain is lifted partially and the apparent chain
                      motion is accelerated. We observe a crossover from pure
                      Rouse motion at short times to topological confined motion
                      beyond the time when the segmental mean squared displacement
                      has reached the distance to the next graft.},
      cin          = {Neutronenstreuung ; JCNS-1 / ICS-1 / JCNS (München) ;
                      Jülich Centre for Neutron Science JCNS (München) ;
                      JCNS-FRM-II / JCNS-SNS},
      ddc          = {550},
      cid          = {I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)ICS-1-20110106 /
                      I:(DE-Juel1)JCNS-FRM-II-20110218 /
                      I:(DE-Juel1)JCNS-SNS-20110128},
      pnm          = {551 - Functional Macromolecules and Complexes (POF3-551) /
                      6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
                      / 6215 - Soft Matter, Health and Life Sciences (POF3-621)},
      pid          = {G:(DE-HGF)POF3-551 / G:(DE-HGF)POF3-6G4 /
                      G:(DE-HGF)POF3-6215},
      experiment   = {EXP:(DE-MLZ)KWS1-20140101 / EXP:(DE-MLZ)SPHERES-20140101 /
                      EXP:(DE-MLZ)J-NSE-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000406334600014},
      doi          = {10.1103/PhysRevLett.119.047801},
      url          = {https://juser.fz-juelich.de/record/836208},
}