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2019-05-16
11:28
OpenAccess [FZJ-2019-02835] Journal Article

Model-independent recovery of interfacial structure from multi-contrast neutron reflectivity data
Neutron specular reflectivity at soft interfaces provides sub-nanometre information concerning the molecular distribution of thin films, while the application of contrast variation can highlight the scattering from different parts of the system and lead to an overall reduction in fitting ambiguity. Traditional modelling approaches involve the construction of a trial scattering length density profile based on initial speculation and the subsequent refinement of its parameters through minimization of the discrepancy between the calculated and measured reflectivity. [...]
ddc:540
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2019-05-14
11:28
[FZJ-2018-07659] Contribution to a book

Powder and single crystal diffractometry: chemical and magnetic structures
Lecture Notes of the 50th IFF Spring School 'Scattering! Soft, Functional and Quantum Materials' Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Schriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien / Key Technologies 190, D3 - D3.32 ()
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2019-04-06
11:28
[FZJ-2018-06731] Contribution to a book

The structure of complex fluids
Lecture Notes of the 50th IFF Spring School 'Scattering! Soft, Functional and Quantum Materials' Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Schriften des Forschungszentrums Jülich Reihe Schlüsseltechnologien / Key Technologies 190, B3.1 bis B3.27 ()

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2019-03-13
11:28
OpenAccess [FZJ-2019-01733] Journal Article
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The locally columnar model for clay/polymer systems: Connections to scattering experiments
A tight connection of scattering to thermodynamic models is missing for clay systems. A new approach called “locally columnar model” gives an attempt for making this connection. [...]
ddc:540
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2019-02-08
11:28
OpenAccess [FZJ-2019-00718] Journal Article
et al
Using neutron methods SANS and PGAA to study evolution of structure and composition of Alkali-doped Polybenzimidazole membranes
Potassium hydroxide (KOH) doped polybenzimidazole (PBI) membranes are investigated as compelling candidates for water electrolysis applications, drastically reducing the ohmic losses in contrast to thick ZrO2 based diaphragms. Using small angle neutron scattering (SANS) we have found that the structure of the (KOH doped) PBI changes with doping time on a minute time scale, and that the development of the structure is highly dependent on the KOH concentration. [...]
ddc:570
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2019-01-11
11:31
OpenAccess [FZJ-2018-07629] Journal Article
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Fluorine-free water-in-ionomer electrolytes for sustainable lithium-ion batteries
The continuously increasing number and size of lithium-based batteries developed for large-scale applications raise serious environmental concerns. Herein, we address the issues related to electrolyte toxicity and safety by proposing a “water-in-ionomer” type of electrolyte which replaces organic solvents by water and expensive and toxic fluorinated lithium salts by a non-fluorinated, inexpensive and non-toxic superabsorbing ionomer, lithium polyacrylate. [...]
ddc:500
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2018-10-08
12:41
OpenAccess [FZJ-2018-05175] Journal Article
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Stability of near-surface ordering of bicontinuous microemulsions in external shear-fields
The lubrication effect of bicontinuous microemulsions describes a facilitated flow along hydrophilic planar surfaces because the fluid forms lamellar domains that can slide off along each other much better than randomly ordered domains. The applicability of this effect is based on the prerequisite of the lamellar structure not being destroyed by external shear-fields. [...]
ddc:540
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2018-09-14
11:28
OpenAccess [FZJ-2018-03075] Journal Article
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The high-intensity reflectometer of the Jülich Centre for Neutron Science: MARIA
MARIA (magnetism reflectometer with high incident angle) is a world class vertical sample reflectometer dedicated to the investigation of thin films in the fields of magnetism, soft matter and biology. The elliptical vertically focusing guide allows one to measure small samples with a typical size of 1 × 1 cm very efficiently. [...]
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2018-08-03
11:28
OpenAccess [FZJ-2018-04349] Journal Article

Strategies for removing multiple scattering effects revisited
The multiple scattering problem of small angle neutron scattering (SANS) is revisited using differential equations from which different contributions are derived. The coherent scattering is connected to multiple scattering events and the ideal single scattering cross sections can be related to the apparent scattering cross section. [...]
ddc:530
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2018-05-06
11:33
OpenAccess [FZJ-2018-02694] Journal Article
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Capillary condensation and gelling of microemulsions with clay additives
The capillary condensation in bicontinuous microemulsions takes place when two parallel surfaces are narrowed that result in a completely lamellar microemulsion. We expected that this phase transition is also observable when the amount of hydrophilic surfaces from clay particles is raised, because hydrophilic surfaces induce lamellar ordering locally. [...]
ddc:540
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