Analysis of SESANS data by numerical Hankel transform implementation in SasView

Bakker, J.H.; Washington, A. L.; Parnell, Steven R.; Well, A.A. van; Pappas, C.; Bouwman, Wim G.

doi:10.3233/jnr-200154

Cited by 10 publications

(10 citation statements)

References 33 publications

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“…The solid lines, therefore, represent subsequent nonlinear least square fits with the polydisperse hard-sphere model, where the projected real-space correlation function G(ξ) is calculated by a numerical Hankel transform, according to Ref. [32] (Equation ( 3)), of the analytic expression of the scattered intensity according to Equations ( 5)- (12). The model thus accommodates the form factor (FG) of the spheres, i.e., the hard-sphere structure factor, for their high concentration and thus correlation, as well as their polydispersity.…”

Section: Resultsmentioning

confidence: 99%

Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study

Kim

Valsecchi

et al. 2022

Applied Sciences

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Scattering studies of milk and milk products, which are highly relevant food products on the global market, are often utilized and reported in literature to investigate and understand the subtle microscopic structural differences between dairy samples. These structural features determine the physical properties and ultimately the texture of milk products and, thus, also influence the consumer’s experience. Small-angle neutron scattering is a prominent example, which enables observations of length scales, which convey proteins and fat globules in food-grade milk. In addition, deuteration enables contrast variations between the constituents of dairy products. In this study, we investigate the potential of probing small-angle neutron scattering from milk samples through quantitative neutron dark-field imaging using grating interferometry, to establish the feasibility of studying, in particular, fat globules and milk gel structures with this spatially resolved scattering technique.

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Section: Resultsmentioning

confidence: 99%

Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study

Kim

Valsecchi

et al. 2022

Applied Sciences

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“…Normalization, primary beam masking, and background subtraction were carried out using RAW. 62 Analysis was carried out using SASView (version 4.1.2, http://www.sasview.org/) 63 assuming scattering length densities of 9.47 × 10 −6 /Å 2 and 126 × 10 −6 /Å 2 for the water and nanoparticles, respectively. As small metallic nanoparticles are known to be facetted, the data were fit assuming them to be square prisms, 64 which yielded good fits over the entire scattering vector range without needing to add polydispersity.…”

Section: Methodsmentioning

confidence: 99%

Lethal Interactions of Atomically Precise Gold Nanoclusters and Pseudomonas aeruginosa and Staphylococcus aureus Bacterial Cells

Linklater

Guével

Bryant

et al. 2022

ACS Appl. Mater. Interfaces

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Ultrasmall metal nanoclusters (NCs) are employed in an array of diagnostic and therapeutic applications due to their tunable photoluminescence, high biocompatibility, polyvalent effect, ease of modification, and photothermal stability. However, gold nanoclusters’ (AuNCs’) intrinsically antimicrobial properties remain poorly explored and are not well understood. Here, we share an insight into the antimicrobial action of atomically precise AuNCs based on their ability to passively translocate across the bacterial membrane. Functionalized by a hydrophilic modified-bidentate sulfobetaine zwitterionic molecule (AuNC-ZwBuEt) or a more hydrophobic monodentate-thiolate, mercaptohexanoic acid (AuNC-MHA) molecule, 2 nm AuNCs were lethal to both Gram-negative Pseudomonas aeruginosa and Gram-positive Staphylococcus aureus bacteria. The bactericidal efficiency was found to be bacterial strain-, time-, and concentration-dependent. The direct visualizations of the translocation of AuNCs and AuNC–cell and subcellular interactions were investigated using cryo-soft X-ray nano-tomography, transmission electron microscopy (TEM), and scanning TEM energy-dispersive spectroscopy analyses. AuNC-MHA were identified in the bacterial cytoplasm within 30 min, without evidence of the loss of membrane integrity. It is proposed that the bactericidal effect of AuNCs is attributed to their size, which allows for efficient energy-independent translocation across the cell membrane. The internalization of both AuNCs caused massive internal damage to the cells, including collapsed subcellular structures and altered cell morphology, leading to the eventual loss of cellular integrity.

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“…Several studies have explored polymer systems such as colloids [ 57 ] and fibrous calcium caseinate gels [ 58 ]. However, it is only recently that new instrumentation at large facilities [ 59 ], and straightforward analysis techniques, have emerged for structural determination [ 60 ]. There also exist possibilities to use this technique to look at the kinetics [ 61 ], and a similar approach could be undertaken to look at the kinetics of film formation.…”

Section: Advanced Structural Characterization Of Pil-based Membranesmentioning

confidence: 99%

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

Bernardo

Gaspar

2023

Polymers

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Poly(ionic liquid)-based membranes have been the subject of intensive research in the last 15 years due to their potential for the separation of CO2 from other gases. In this short review, different types of PIL-based membranes for CO2 separation are described (neat PIL membranes; PIL-IL composite membranes; PIL-polymer blend membranes; PIL-based block copolymer membranes, and PIL-based mixed matrix membranes), and their state-of-the-art separation results for different gas pairs (CO2/N2, CO2/H2, and CO2/CH4) are presented and discussed. This review article is focused on the most relevant research works performed over the last 5 years, that is, since the year 2017 onwards, in the field of poly(ionic liquid)-based membranes for CO2 separation. The micro- and nano-morphological characterization of the membranes is highlighted as a research topic that requires deeper study and understanding. Nowadays there is an array of advanced structural characterization techniques, such as neutron scattering techniques with contrast variation (using selective deuteration), that can be used to probe the micro- and nanostructure of membranes, in length scales ranging from ~ 1 nm to ~ 15 mm. Although some of these techniques have been used to study the morphology of PIL-based membranes for electrochemical applications, their use in the study of PIL-based membranes for CO2 separation is still unknown.

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Analysis of SESANS data by numerical Hankel transform implementation in SasView

Cited by 10 publications

References 33 publications

Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study

Quantitative Neutron Dark-Field Imaging of Milk: A Feasibility Study

Lethal Interactions of Atomically Precise Gold Nanoclusters and Pseudomonas aeruginosa and Staphylococcus aureus Bacterial Cells

Recent Advances in Poly(Ionic Liquid)-Based Membranes for CO2 Separation

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