Contribution of Small-Angle X-Ray and Neutron Scattering (SAXS and SANS) to the Characterization of Natural Nanomaterials

Barré, Loı̈c

doi:10.1007/978-3-662-48606-1_12

Cited by 4 publications

(2 citation statements)

References 66 publications

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“…As commonly proposed for such systems, 35,36,37 P(q) is taken as a core shell spherical form factor and a sticky hard sphere structure factor S(q). 38−42 Details of equations are given in the Supporting Information.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Understanding the Effect of the Phase Modifier n-Octanol on Extraction, Aggregation, and Third-Phase Appearance in Solvent Extraction

Dourdain

Pellet‐Rostaing

2020

Langmuir

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Phase modifiers are often added to solvent extraction processes to avoid the third-phase formation. While this important issue was attributed to sticky interactions between reverse aggregates, structural effects of phase modifiers remain ambiguous. As they are similar to reverse hydrotropes, phase modifiers may act as cosurfactants or cosolvents in the organic phase in a solvent extraction system. We therefore applied an innovative small-angle scattering approach coupled with surface tension measurements on the industrially applied AMEX process to evaluate how phase modifiers repel the third phase and affect the extraction properties. We first confirmed that adding 1-octanol has a small influence on the extraction performance. By varying the scattering contrast of the solution with deuterated 1-octanol, we found that 1-octanol is located both in the solvent, acting as a cosolvent and diluting the aggregates, and in an outer shell of the aggregates. Further surface tension measurements demonstrated that instead of penetrating till the core of the aggregates as a cosurfactant, 1-octanol only penetrates their shell and forms a shielding barrier avoiding the coalescence of aggregates.

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Section: ■ Results and Discussionmentioning

confidence: 99%

“…As commonly proposed for such systems, ,, P( q ) is taken as a core shell spherical form factor and a sticky hard sphere structure factor S( q ). − Details of equations are given in the Supporting Information. P( q ) depends on the core and aggregate radii and on their scattering length densities.…”

Section: Resultsmentioning

confidence: 99%

Understanding the Effect of the Phase Modifier n-Octanol on Extraction, Aggregation, and Third-Phase Appearance in Solvent Extraction

Dourdain

Pellet‐Rostaing

2020

Langmuir

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Application of Small- and Ultra-Small-Angle Neutron Scattering for the Characterization of Mechanically Plated Coatings

Chung,

Mata,

Wang

et al. 2024

J. of Materi Eng and Perform

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Post-mechanical plating heat treatment induces the formation of an iron–zinc (Fe-Zn) rich intermetallic layer between Zn and ZnSn coatings and the substrate. Despite increased outer coating porosity, the corrosion resistance of Zn- and ZnSn-coated steels significantly improves after heat treatment, attributed to the formation of intermetallic phases. This study employs small- and ultra-small-angle neutron scattering (SANS and USANS) to investigate the behavior of mechanically plated Zn and ZnSn coatings pre- and post-heat treatment. In the presence of a relatively thick steel substrate, strong multiple scattering occurs. However, by identifying a specific high Q-range region where multiple scattering is negligible, we reveal small but significant differences. Porod’s slopes, denoted as ‘n’, are calculated for uncoated steel, and Zn- and ZnSn-coated steels (both with and without heat treatment). These slope values reflect contributions from different interfaces on the particles’ surface roughness. Despite the challenges of multiple scattering, our findings offer valuable insights into coatings’ behavior. The study lays a foundation for future investigations into coating behavior using SANS/USANS techniques.

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Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

Krasley,

Li,

Galeana

et al. 2024

Chem. Rev.

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Fluorescent carbon nanomaterials have broadly useful chemical and photophysical attributes that are conducive to applications in biology. In this review, we focus on materials whose photophysics allow for the use of these materials in biomedical and environmental applications, with emphasis on imaging, biosensing, and cargo delivery. The review focuses primarily on graphitic carbon nanomaterials including graphene and its derivatives, carbon nanotubes, as well as carbon dots and carbon nanohoops. Recent advances in and future prospects of these fields are discussed at depth, and where appropriate, references to reviews pertaining to older literature are provided.

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Contribution of Small-Angle X-Ray and Neutron Scattering (SAXS and SANS) to the Characterization of Natural Nanomaterials

Cited by 4 publications

References 66 publications

Understanding the Effect of the Phase Modifier n-Octanol on Extraction, Aggregation, and Third-Phase Appearance in Solvent Extraction

Understanding the Effect of the Phase Modifier n-Octanol on Extraction, Aggregation, and Third-Phase Appearance in Solvent Extraction

Application of Small- and Ultra-Small-Angle Neutron Scattering for the Characterization of Mechanically Plated Coatings

Carbon Nanomaterial Fluorescent Probes and Their Biological Applications

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