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@ARTICLE{Trapp:11850,
      author       = {Trapp, M. and Gutberlet, T. and Juranyi, F. and Unruh, T.
                      and Demé, B. and Tehei, M. and Peters, J.},
      title        = {{H}ydration dependent studies of highly aligned multilayer
                      lipid membranes by neutron scattering},
      journal      = {The journal of chemical physics},
      volume       = {133},
      issn         = {0021-9606},
      address      = {Melville, NY},
      publisher    = {American Institute of Physics},
      reportid     = {PreJuSER-11850},
      pages        = {164505},
      year         = {2010},
      note         = {The authors thank F. Natali and S. Busch for the fruitful
                      discussions. M. Trapp was supported by a Ph.D. scholarship
                      from the French Ministry for Research and Technology. This
                      research project has been supported by the European
                      Commission under the Sixth Framework Program through the Key
                      Action: Strengthening the European Research Area, Research
                      Infrastructures (Contract No. RII3-CT-2003-5059825). We
                      acknowledge the ILL and the FRM II for the allocation of
                      beamtime and the financial support from the Access to Major
                      Research Facilities Program which is a component of the
                      International Science Linkages Program established under the
                      Australian Government's innovation statement, Backing
                      Australia's Ability.},
      abstract     = {We investigated molecular motions on a picosecond timescale
                      of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) model
                      membranes as a function of hydration by using elastic and
                      quasielastic neutron scattering. Two different hydrations
                      corresponding to approximately nine and twelve water
                      molecules per lipid were studied, the latter being the fully
                      hydrated state. In our study, we focused on head group
                      motions by using chain deuterated lipids. Information on
                      in-plane and out-of-plane motions could be extracted by
                      using solid supported DMPC multilayers. Our studies confirm
                      and complete former investigations by König et al. [J.
                      Phys. II (France) 2, 1589 (1992)] and Rheinstädter et al.
                      [Phys. Rev. Lett. 101, 248106 (2008)] who described the
                      dynamics of lipid membranes, but did not explore the
                      influence of hydration on the head group dynamics as
                      presented here. From the elastic data, a clear shift of the
                      main phase transition from the P(β) ripple phase to the
                      L(α) liquid phase was observed. Decreasing water content
                      moves the transition temperature to higher temperatures. The
                      quasielastic data permit a closer investigation of the
                      different types of head group motion of the two samples. Two
                      different models are needed to fit the elastic incoherent
                      structure factor and corresponding radii were calculated.
                      The presented data show the strong influence hydration has
                      on the head group mobility of DMPC.},
      keywords     = {Dimyristoylphosphatidylcholine: chemistry / Membranes,
                      Artificial / Neutron Diffraction / Phase Transition / Water:
                      chemistry / Membranes, Artificial (NLM Chemicals) /
                      Dimyristoylphosphatidylcholine (NLM Chemicals) / Water (NLM
                      Chemicals) / J (WoSType)},
      cin          = {IFF-4 / IFF-5 / Jülich Centre for Neutron Science JCNS
                      (JCNS) ; JCNS},
      ddc          = {540},
      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)TOF-TOF-20140101},
      shelfmark    = {Physics, Atomic, Molecular $\&$ Chemical},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:21033803},
      UT           = {WOS:000283753600036},
      doi          = {10.1063/1.3495973},
      url          = {https://juser.fz-juelich.de/record/11850},
}