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@ARTICLE{Sharma:908553,
      author       = {Sharma, Aakash and Kruteva, Margarita and Zamponi, Michaela
                      and Ehlert, Sascha and Richter, Dieter and Förster,
                      Stephan},
      title        = {{Q}uasielastic neutron scattering reveals the temperature
                      dependent rotational dynamics of densely grafted oleic acid},
      journal      = {The journal of chemical physics},
      volume       = {156},
      number       = {16},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2022-02677},
      pages        = {164908 -},
      year         = {2022},
      abstract     = {We study the dynamics of pure oleic acid and grafted oleic
                      acid synthesized by decomposing iron oleate into oleic acid
                      grafted iron oxide nanoparticles. Our quasielastic neutron
                      scattering study shows that oleic acid dominantly performs
                      translational diffusion at room temperature. On the other
                      hand, in nanocomposites, constraints imposed by grafting and
                      crowding of neighboring chains restrict the grafted oleic
                      acid to uniaxial rotation. Interestingly, it also manifests
                      mobility in grafted oleic acid below the crystallization
                      temperature of pure oleic acid. The data from grafted oleic
                      acid could be effectively described using a uniaxial
                      rotational diffusion model with an additional elastic
                      scattering contribution. This kind of elastic scattering
                      arises due to the restricted bond mobility and increases
                      with decreasing temperature. The radius of rotation obtained
                      from the fitted data agrees very well with the geometry of
                      the molecule and grafting density. These results open
                      possibilities of research on the confined surfactant
                      systems, which could be analyzed using the approach
                      described here},
      cin          = {JCNS-FRM-II / MLZ / JCNS-1 / JCNS-2 / JCNS-4 / PGI-4 /
                      JARA-FIT},
      ddc          = {530},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
                      I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106 /
                      I:(DE-Juel1)JCNS-4-20201012 / I:(DE-Juel1)PGI-4-20110106 /
                      $I:(DE-82)080009_20140620$},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)SPHERES-20140101},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {35490007},
      UT           = {WOS:000818945100017},
      doi          = {10.1063/5.0089874},
      url          = {https://juser.fz-juelich.de/record/908553},
}