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Small momentum transfer diffractometer D16

D16 is a small momentum transfer diffractometer with variable vertical focusing, for the study of partially ordered structures such as stacked membranes or intercalated layers. The scattering geometry obtained with large, vertically oriented samples, profits the most from the large vertical cross section of the beam at the sample position. The instrument can also be used for small angle scattering and powder diffraction in an intermediate q-range (0.01-2.5 Å-1).

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Applications


Biology/Biophysics

  • diffraction studies of biological materials (e.g.: collagen in human bone, spider dragline silk)
  • structures and phase transitions of bulk and solid supported lyotropic mesophases (phospholipids, glycolipids, nucleic acids)
  • glass transition of water confined between lipid bilayers
  • studies of fusion peptides in model membranes
  • purple membranes (thermal dynamics after flash cooling, effect of high pressures)
  • topological studies of histone tetramers in solution
  • hydration and denaturation of proteins in non-aqueous solvents


Colloids/Surfactants

  • mapping of in-plane charge distribution in mixtures of anionic and cationic surfactants
  • swelling of clay minerals under confined conditions and controlled relative humidity
  • phase transitions of surfactants confined in the clay interlamellar space
  • water structure in the interlayer space of cationic and anionic clay minerals
  • structure-permeability relations in plate-spherical particle mixtures
  • swelling of single crystal vermiculites by aqueous polymer solutions
  • structure of cyanobiphenyls liquid crystals confined in porous sol-gel glasses


Polymer physics

  • superstructure in syndiotactic polystyrene intercalates
  • extension and orientation in polymer extrudate from a multipass rheometer


Material science

  • diffraction from crystalline bundles of single-wall carbon nanotubes
  • characterization of Ti and Co substituted manganites
  • hydrogen sorption in magnesium composites
  • neutron diffraction studies of isotope-substituted i-AlCuFe quasicrystals
  • improved hydrogen sorption kinetics in new magnesium composites for clean energy storage and transport
  • the role of doped electrons in Mn4+ -rich 'bi-layer' manganite perovksites: search for evidence of FM clusters
  • search for a cluster-glass state in perovksites
  • phase separation in manganites: magnetic cluster formation and percolation
  • neutron scattering study of the Verwey transition in magnetite
  • neutron diffraction investigation of a predicted quantum critical point in doped manganites


Surface science

  • surface induced changes in the structure of sheared liquids
  • phase behaviour of adsorbed monolayers of binary alcohol mixtures
  • mechanisms of structure formation in templated growth of metal oxide films

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