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@ARTICLE{vanderLoop:22197,
      author       = {van der Loop, T.H. and Panman, M.R. and Lotze, S. and
                      Zhang, J. and Vad, T. and Bakker, H.J. and Sager, W.F.C. and
                      Woutersen, S.},
      title        = {{S}tructure and dynamics of water in nonionic reverse
                      micelles: {A} combined time-resolved infrared and small
                      angle x-ray scattering study},
      journal      = {The journal of chemical physics},
      volume       = {137},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-22197},
      pages        = {044503},
      year         = {2012},
      note         = {The authors would like to thank Stichting voor Fundamenteel
                      Onderzoek der Materie (FOM) for financial support and Dr. P.
                      Konarev (EMBL-Hamburg) for assistance in performing the SAXS
                      experiments.},
      abstract     = {We study the structure and reorientation dynamics of
                      nanometer-sized water droplets inside nonionic reverse
                      micelles (water/Igepal-CO-520/cyclohexane) with
                      time-resolved mid-infrared pump-probe spectroscopy and small
                      angle x-ray scattering. In the time-resolved experiments, we
                      probe the vibrational and orientational dynamics of the O-D
                      bonds of dilute HDO:H(2)O mixtures in Igepal reverse
                      micelles as a function of temperature and micelle size. We
                      find that even small micelles contain a large fraction of
                      water that reorients at the same rate as water in the bulk,
                      which indicates that the polyethylene oxide chains of the
                      surfactant do not penetrate into the water volume. We also
                      observe that the confinement affects the reorientation
                      dynamics of only the first hydration layer. From the
                      temperature dependent surface-water dynamics, we estimate an
                      activation enthalpy for reorientation of 45 ± 9 kJ mol(-1)
                      (11 ± 2 kcal mol(-1)), which is close to the activation
                      energy of the reorientation of water molecules in ice.},
      keywords     = {J (WoSType)},
      cin          = {ICS-3},
      ddc          = {540},
      cid          = {I:(DE-Juel1)ICS-3-20110106},
      pnm          = {BioSoft: Makromolekulare Systeme und biologische
                      Informationsverarbeitung},
      pid          = {G:(DE-Juel1)FUEK505},
      shelfmark    = {Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:22852627},
      UT           = {WOS:000307611500038},
      doi          = {10.1063/1.4736562},
      url          = {https://juser.fz-juelich.de/record/22197},
}