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Neutron research

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Displaying 176 - 200 of 925

Fabrication of black body grids by thick film printing for quantitative neutron imaging

June 8, 2022
Author(s)
Martin Wissink, Kirk Goldenberger, Luke Ferguson, Yuxuan Zhang, Hassina Bilheux, Jacob LaManna, David Jacobson, Michael Kass, Charles Finney, Jonathan Willocks
Neutron imaging offers deep penetration through many high-Z materials while also having high sensitivity to certain low-Z isotopes such as 1H, 6Li, and 10B. This unique combination of properties has made neutron imaging an attractive tool for a wide range

Probing the Link between Pancratistatin and Mitochondrial Apoptosis through Changes in the Membrane Dynamics on the Nanoscale

June 6, 2022
Author(s)
Stuart R. Castillo, Brett W. Rickeard, Mitchell DiPasquale, Michael H. Nguyen, Aislyn Lewis-Laurent, Milka Doktorova, Batuhan Kav, Markus S. Miettinen, Michihiro Nagao, Elizabeth Kelley, Drew Marquardt
Pancratistatin (PST) is a natural antiviral alkaloid that has demonstrated specificity towards cancerous cells and explicitly targets the mitochondria. PST initiates apoptosis while leaving healthy, noncancerous cells unscathed. However, the manner by

Phase retrieval based on deep learning in grating interferometer

April 25, 2022
Author(s)
Ohsung Oh, Youngju Kim, Daeseung Kim, Daniel Hussey, Seung Wook Lee
Grating interferometry is a promising technique to obtain differential phase contrast images with illumination source of low intrinsic transverse coherence. However, retrieving the phase contrast image from the differential phase contrast image is

Structures and Dynamics of Anionic Lipoprotein Nanodiscs

April 21, 2022
Author(s)
D. Sweeney, Susan T. Krueger, Kakali Sen, John Hackett
Nanolipoprotein particles known as nanodiscs (NDs) have emerged as versatile and powerful tools for the stabilization of mem-brane proteins permitting a plethora of structural and biophysical studies. Part of their allure is their flexibility to

Q-Dependent Collective Relaxation Dynamics of Glass-Forming Liquid Ca 0.4 K 0.6 (NO 3 ) 1.4 Investigated by Wide-Angle Neutron Spin-Echo

April 19, 2022
Author(s)
Peng Luo, Yanqin Zhai, Peter Falus, Victoria Garcia Sakai, Monika Hartl, Maiko Kofu, Kenji Nakajima, Antonio Faraone, Y. Z
Employing high-intensity wide-angle neutron spin-echo spectroscopy, we measured the coherent intermediate scattering function of the prototypical ionic glass former Ca 0.4K 0.6(NO 3) 1.4 in the equilibrium and supercooled liquid state from 383 to 519 K

Transformation of Lipid Vesicles into Micelles by Adding Nonionic Surfactants: Elucidating the Structural Pathway and the Intermediate Structures

March 24, 2022
Author(s)
Igor K. Mkam Tsengam, Marzhana Omarova, Elizabeth Kelley, Alon V. McCormick, Geoffrey D. Bothun, Srinivasa R. Raghavan, Vijay T. John
The phospholipid lecithin (L) and the nonionic surfactant Tween 80 (T) are used together in various contexts, including in drug delivery and oil spill remediation. There is hence a need to elucidate the nanostructures in L/T mixtures, which is the focus of

Analysis of a silicon comb structure using an inverse Talbot-Lau neutron grating interferometer

March 3, 2022
Author(s)
Youngju Kim, Daeseung Kim, Jongyul Kim, Daniel Hussey, Mona Mirzaei, Dmitri Pushin, Charles W. Clark, Seung Lee
We describe an inverse Talbot-Lau neutron grating interferometer that provides an extended autocorrelation length range for quantitative dark-field imaging. To our knowledge, this is the first report of a Talbot-Lau neutron grating interferometer (nTLI)

Head on Comparison of Self- and Nano-Assemblies of Gamma Peptide Nucleic Acid Amphiphiles

February 9, 2022
Author(s)
Shipra Malik, Vikas Kumar, Chung-Hao Liu, Kuo-Chih Shih, Susan T. Krueger, Mu-Ping Neih, Raman Bahal
Peptide nucleic acids (PNAs) are nucleic acid analogs with superior hybridization properties and enzymatic stability than deoxyribonucleic acid (DNA). In addition to gene targeting applications, PNAs have garnered significant attention as bio-polymer due

Low-Background Neutron Reflectometry from Solid/Liquid Interfaces

February 1, 2022
Author(s)
David Hoogerheide, Joseph Dura, Brian B. Maranville, Charles F. Majkrzak
Liquid cells are an increasingly common sample environment for neutron reflectometry experiments and are critical for measuring the properties of materials at solid/liquid interfaces. Background scattering determines the maximum useful scattering vector

Neutron vibrational spectroscopic evidence for short H???H contacts in the RNiInH1.4; 1.6 (R = Ce, La) metal hydride

February 1, 2022
Author(s)
Ryan Klein, Rafael Balderas-Xicohtencatl, Jan Petter Maehlen, Terrence J. Udovic, Craig Brown, Robert Delaplane, Yongqiang Cheng, Roman Denys, Anibal Ramirez Cuesta, Volodymyr Yartys
Intermetallic metal hydrides are critical materials for hydrogen storage applications, however, metal hydrides with greater storage capacities are still needed. Within metal hydrides, the volumetric storage capacities are limited by the number of hydrogen

Styrene-Maleic Acid Copolymer Nanodiscs to Determine the Shape of Membrane Proteins

January 28, 2022
Author(s)
Cheol Jeong, Ryan Franklin, Karen J. Edler, Kenno Vanommeslaeghe, Joseph E. Curtis
Lipid nanodiscs can be used to solubilize functional membrane proteins (MPs) in nativelike environments. Thus, they are promising reagents that have been proven useful to characterize MPs. Both protein and non-protein molecular belts have shown promise to

Dynamics of Molecular Associates in Methanol/Water Mixtures

January 26, 2022
Author(s)
Yanqin Zhai, Peng Luo, Jackson Waller, Jeffrey L. Self, Leland Harriger, Y. Z., Antonio Faraone
The dynamics of molecular associates in methanol/water mixtures was investigated using quasielastic neutron scattering. By measuring the signal from four methanol/water samples differing only by their isotopic composition, the relative motion of the water

Intact, Commercial Lithium-Polymer Batteries: Spatially Resolved Grating-Based Interferometry Imaging, Bragg Edge Imaging, and Neutron Diffraction

January 25, 2022
Author(s)
Adam Brooks, Daniel Hussey, Kyungmin Ham, David Jacobson, Ingo Manke, Nikolay Kardjilov, Leslie G. Butler
We survey several neutron imaging and diffraction methods for non-destructive testing and evaluation of intact, commercial lithium-ion batteries. Specifically, far-field interferometry was explored as an option to probe a wide range of autocorrelation

Predicting the plateau modulus from molecular parameters of conjugated polymers

January 18, 2022
Author(s)
Abigail Fenton, Renxuan Xie, Melissa Aplan, Youngmin Lee, Michael Gill, Ryan Fair, Fabian Kempe, Michael Sommer, Chad R. Snyder, Enrique Gomez, Ralph Colby
The relationship between Kuhn length lk, Kuhn monomer volume v0, and plateau modulus GN0 , initially proposed by Graessley and Edwards for flexible polymers, and extended by Everaers, has a large gap in experimental data between the flexible and stiff
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