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[lecture#5]

[lecture#5]. [lecture#5]. 3. Small Angle Neutron Scattering. ILL. ILL, Grenoble/FR : the most advanced Neutron Scattering facility in the world. . ILL Guide Hall . ILL Reactor. ILL Experimental Hall. SANS at ILL : Beamline D22. SANS at IFF - Jülich / GE. NEUTRON Sources.

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[lecture#5]

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  1. [lecture#5]

  2. [lecture#5] 3.Small Angle Neutron Scattering

  3. ILL ILL, Grenoble/FR : the most advanced Neutron Scattering facility in the world.

  4. ILL Guide Hall

  5. ILL Reactor

  6. ILL Experimental Hall

  7. SANS at ILL : Beamline D22

  8. SANS at IFF - Jülich / GE

  9. NEUTRON Sources

  10. NEUTRON Sources

  11. Scattering lengths and Cross section

  12. H2O vs. D2O

  13. SANS Contrast Matching

  14. Scattering from a Gaussian coil polymer in solution

  15. Scattering from a uniform sphere

  16. Scattering from cylindrical shapes

  17. Real SANS data

  18. Real SANS data

  19. Real SANS data

  20. Real SANS data

  21. Real SANS data

  22. Real SANS data

  23. Real SANS data

  24. Real SANS data

  25. Real SANS data

  26. Real SANS data

  27. Real SANS data

  28. Real SANS data

  29. Nucleation and growth studied by time-resolved SANS S.U. Egelhaaf (ILL), P. Schurtenberger (ETH Zürich), J. Morris, U. Olsson, H. Wennerström (Lund University) Figure 1: Oligodisperse oil-in-water microemulsion droplets are quenched into a two phase area. At final equilibrium, smaller droplets coexist with an excess oil phase that nucleates at a few of the initial droplets which subsequently grow (t > 0), allowing the majority of droplets to decrease in size. This growth phase proceeds with a constant number of large drops (t >> 0).

  30. Nucleation and growth studied by time-resolved SANS S.U. Egelhaaf (ILL), P. Schurtenberger (ETH Zürich), J. Morris, U. Olsson, H. Wennerström (Lund University) Figure 2: Sequence of scattering curves from a time-resolved small-angle neutron-scattering experiment recorded during the nucleation and growth of an excess oil phase from oil-in-water microemulsion droplets. For clarity only every second measurement is shown. As an example the scattering curve obtained at t = 3150 s is added as an inset.

  31. Nucleation and growth studied by time-resolved SANS S.U. Egelhaaf (ILL), P. Schurtenberger (ETH Zürich), J. Morris, U. Olsson, H. Wennerström (Lund University) Figure 3: Time-dependence of the radius of gyration Rg,big as obtained from a Guinier fit. Also shown is the power law behaviour expected for a classical Ostwald ripening process.

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