Neutron reflectivity for the investigation of coatings and functional layers

Wolff, Max; Gutfreund, Philipp

doi:10.1016/b978-0-444-63239-5.00004-4

Cited by 2 publications

(2 citation statements)

References 116 publications

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“…The details of the NR technique, which is designed to study the structure of thin films and other layered systems, can be found elsewhere 19 and recently a review on the study of surface coatings with NR was published. 20 Shortly, the technique is based on the measurement of the reflected intensity R of a neutron beam sent under grazing incidence on the surface to be studied. A sketch of the scattering geometry is shown in Figure 1a.…”

Section: Neutron Reflectivitymentioning

confidence: 99%

Neutron Reflectivity in Corrosion Research on Metals

Karlsson,

Johansson,

Mazzei

et al. 2024

ACS Mater. Au

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Neutron reflectivity (NR) is potentially a powerful tool for characterizing chemical and morphological changes in thin films and at buried interfaces in corrosion science. While the scope of NR is limited by its inherent demands for low surface roughness and high sample planarity, these drawbacks are compensated for by the unique ability to detect light elements and distinguish between isotopes. Furthermore, the generally weak absorption of neutrons by matter allows the use of bulky sample environments and in situ experiments. In particular, the layer thickness range of 3–100 nm accessible by NR is appropriate for studying air-formed films and passive films, which are crucial for the ability of metallic materials to resist corrosion, as well as for investigating the interaction of metal surfaces with hydrogen and its compounds, e.g., water. Also, NR is suitable for studying early stages of oxide growth on metals at high temperature, including the transition from Cabrera–Mott-type films to Wagner-type growth. Here, we outline key characteristics of NR as applied to the study of corrosion of metals, exemplified by earlier work, and discuss perspectives for future work in the field. The aim of our work is to stimulate the application of the unique capabilities of NR to corrosion science.

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Section: Neutron Reflectivitymentioning

confidence: 99%

Neutron Reflectivity in Corrosion Research on Metals

Karlsson,

Johansson,

Mazzei

et al. 2024

ACS Mater. Au

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“…For more details on the method and a recent review see ref. 6 . As for X-rays, lateral fluctuations can be investigated via, so called, off-specular and grazing incidence small angle neutron scattering (GISANS) 7 , 8 .…”

Section: Introductionmentioning

confidence: 99%

Π-GISANS: probing lateral structures with a fan shaped beam

Vorobiev

Paracini

Cárdenas

et al. 2021

Sci Rep

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We have performed grazing incidence neutron small angle scattering using a fan shaped incident beam focused along one dimension. This allows significantly reduced counting times for measurements of lateral correlations parallel to an interface or in a thin film where limited depth resolution is required. We resolve the structure factor of iron inclusions in aluminium oxide and show that the ordering of silica particles deposited on a silicon substrate depends on their size. We report hexagonal packing for 50 nm but not for 200 nm silica spheres deposited by a modified Langmuir-Schaefer method on a silicon substrate. For the 200 nm particles we extract the particles shape from the form factor. Moreover, we report dense packing of the particles spread on a free water surface. We name this method π-GISANS to highlight that it differs from GISANS as it gives lateral information while averaging the in-depth structure.

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Neutron reflectivity for the investigation of coatings and functional layers

Cited by 2 publications

References 116 publications

Neutron Reflectivity in Corrosion Research on Metals

Neutron Reflectivity in Corrosion Research on Metals

Π-GISANS: probing lateral structures with a fan shaped beam

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