Silver behenate and silver stearate powders for calibration of SAS instruments

Nyam-Osor, M; Soloviov, Dmytro; Kovalev, Yu. S.; Zhigunov, Alexander; Rogachev, Andrey; Ivankov, Oleksandr I.; Erhan, Raul Victor; Куклин, А. И.

doi:10.1088/1742-6596/351/1/012024

Cited by 39 publications

(24 citation statements)

References 9 publications

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“…The X-ray wavelength, energy and total flux during the measurements were 0.59 Å, 21.0 keV, and ~10 13 photon mm -2 s −1 , respectively. Calibrations for sample-to-detector distance and instrument were performed using silver behenate for SAXS 33 and LaB6 for WAXS. USAXS, SAXS, and WAXS data were obtained by reducing the collected data using the Irena 34 and Nika 35 macros in the IgorPro software (Wavemetrics, Lake Oswego, OR).…”

Section: Experimental Methods and Materialsmentioning

confidence: 99%

Interfacial Reactivity and Speciation Emerging from Namontmorillonite Interactions with Water and Formic Acid at 200°C: Insights from Reactive Molecular Dynamics Simulations, Infrared Spectroscopy, and X-ray Scattering Measurements

Muraleedharan

Asgar²,

Hahn³

et al. 2020

Preprint

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Reactive organic fluid - mineral interactions at elevated temperatures contribute to the evolution of planetary matter. One of the less studied but important transformations in this regard involves the reactions of formic acid with naturally occurring clays such as sodium montmorillonite. To advance a mechanistic understanding of these interactions, we use ReaxFF reactive molecular dynamics simulations in conjunction with infrared (IR) spectroscopy and X-ray scattering experiments to investigate the speciation behavior of water-formic acid mixtures on sodium montmorillonite interfaces at 473 K and 1 atm. Using a newly developed reactive forcefield, we show that the experimental IR spectra of unreacted and reacted mixture can be accurately reproduced by ReaxFF/MD. We further benchmark the simulation predictions of sodium carbonate and bicarbonate formation in the clay interlayers using Small and Wide-Angle X-ray Scattering measurements. Subsequently, leveraging the benchmarked forcefield, we interrogate the pathway of speciation reactions with emphasis on carbonate, formate, and hydroxide groups elucidating the energetics, transition states, intermediates, and preferred products. We also delineate the differences in reactivities and catalytic effects of clay edges, facets, and interlayers owing to their local chemical environments, which have far reaching consequences in their speciation behavior. The experimental and simulation approaches described in this study and the transferable forcefields can be applied translationally to advance the science of clay-fluid interactions for several applications including subsurface fluid storage and recovery and clay-pollutant dynamics

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Section: Experimental Methods and Materialsmentioning

confidence: 99%

Interfacial Reactivity and Speciation Emerging from Namontmorillonite Interactions with Water and Formic Acid at 200°C: Insights from Reactive Molecular Dynamics Simulations, Infrared Spectroscopy, and X-ray Scattering Measurements

Muraleedharan

Asgar²,

Hahn³

et al. 2020

Preprint

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“…Water was used as a buffer sample. Center of beam line and conversation channel to value of module q -vector was done using silver behenate [ 11 ].…”

Section: Methodsmentioning

confidence: 99%

SAXS Combined with UV-vis Spectroscopy and QELS: Accurate Characterization of Silver Sols Synthesized in Polymer Matrices

et al. 2016

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The present work demonstrates a validation of small-angle X-ray scattering (SAXS) combining with ultra violet and visible (UV-vis) spectroscopy and quasi-elastic light scattering (QELS) analysis for characterization of silver sols synthesized in polymer matrices. Polymer matrix internal structure and polymer chemical nature actually controlled the sol size characteristics. It was shown that for precise analysis of nanoparticle size distribution these techniques should be used simultaneously. All applied methods were in good agreement for the characterization of size distribution of small particles (less than 60 nm) in the sols. Some deviations of the theoretical curves from the experimental ones were observed. The most probable cause is that nanoparticles were not entirely spherical in form.

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“…Two-detector system has no such disadvantage. The need of high resolution at the nearest position for the wide spectrum of samples (alconates [15], proteins [16][17][18][19], dendrimers [20][21][22][23][24][25], nanotubes [26], lipids [27][28][29]) leads to conducting the experiments at the nearest position of the well-collimated detector. Consequently the time of measurements range on the spectrometer YuMO is from 3 min [30,31] up to 12h [32,33].…”

Section: The Comparison Of the Time Of Measurements: One Detector At mentioning

confidence: 99%

High-throughput SANS experiment on two-detector system of YuMO spectrometer

Куклин

Ivankov

Soloviov

et al. 2018

J. Phys.: Conf. Ser.

Self Cite

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Abstract. Using a multidetector system on the YuMO spectrometer allows shortening the time of measurements. The quantitative comparison of the measurement time using one and twodetector mode is done. The time range for experiments was from several minutes up to 12 hours. It was shown that two-detector system shortens more than twice the time of the measurement. While making a structural investigation using advanced software the twodetector system allows to treat the data at a qualitatively new level. An example illustrating the features of the channels choice and measurement time on the spectrometer was shown. The results of this paper could be used when planning the experiments on the YuMO spectrometer, for modernization of the installation and for equipment using time-of-flight method.

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Silver behenate and silver stearate powders for calibration of SAS instruments

Cited by 39 publications

References 9 publications

Interfacial Reactivity and Speciation Emerging from Namontmorillonite Interactions with Water and Formic Acid at 200°C: Insights from Reactive Molecular Dynamics Simulations, Infrared Spectroscopy, and X-ray Scattering Measurements

Interfacial Reactivity and Speciation Emerging from Namontmorillonite Interactions with Water and Formic Acid at 200°C: Insights from Reactive Molecular Dynamics Simulations, Infrared Spectroscopy, and X-ray Scattering Measurements

SAXS Combined with UV-vis Spectroscopy and QELS: Accurate Characterization of Silver Sols Synthesized in Polymer Matrices

High-throughput SANS experiment on two-detector system of YuMO spectrometer

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