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Search Publications

NIST Authors in Bold

Displaying 226 - 250 of 910

Neutron Scattering Investigations of the Global and Local Structures of Ammine Yttrium Borohydrides

July 22, 2021
Author(s)
Jakob Grinderslev, Mikael S. Andersson, Benjamin Trump, Wei Zhou, Terrence J. Udovic, Maths Karlsson, Torben Jensen
Complex metal hydrides are a fascinating and continuously expanding class of materials with many properties relevant for solid-state hydrogen and ammonia storage and solid state electrolytes. The crystal structures are often investigated using powder X-ray

Antiferromagnetic Order and Spin-Canting Transition in the Corrugated Square Net Compound Cu 3 (TeO 4 )(SO 4 ):H 2 O

July 19, 2021
Author(s)
Zhi-Cheng Wang, Kulatheepan Thanabalasingam, Jan P. Scheifers, Alenna Streeter, Gregory T. McCandless, Jonathan N. Gaudet, Craig Brown, Carlo U. Segre, Julia Y. Chan, Fazel Tafti
Strongly correlated electrons in layered perovskite structures have been the birthplace of high-temperature superconductivity, spin liquid, and quantum criticality. Specifically, the cuprate materials with layered structures made of corner sharing square

Polymorphism of Calcium Decahydrido-closo-decaborate and Characterization of Its Hydrates

July 12, 2021
Author(s)
Mathias Jorgensen, Wei Zhou, Hui Wu, Terrence J. Udovic, Mark Paskevicius, Radovan Cerny, Torben R. Jensen
Metal closo-borates and their derivatives have shown promise in several fields of application from cancer therapy to solid-state electrolytes partly owing to their stability in aqueous solutions and high thermal stability. We report the synthesis and

Atomic Dynamics of Metallic Glass Melts La 50 Ni 15 Al 35 and Ce 70 Cu 19 Al 11 Studied by Quasielastic Neutron Scattering

June 23, 2021
Author(s)
Peng Luo, Abhishek Jaiswal, Yanqin Zhai, Zhikun Cai, Nathan P. Walter, Long Zhou, Dawei Ding, Ming Liu, Rebecca Mills, Andrey Podlesnyak, Georg Ehlers, Antonio Faraone, Haiyang Bai, Weihua Wang, Y. Z.
By employing quasi-elastic neutron scattering, we studied the atomic-scale relaxation dynamics and transport mechanism of La 50Ni 15Al 35 and Ce 69Cu 20Al 10Nb 1 Studied by Quasi-Elastic Neutron Scattering metallic glass melts in the temperature range of

Collective Dynamics in Lipid Membranes Containing Transmembrane Peptides

June 21, 2021
Author(s)
Elizabeth Kelley, Paul Butler, Michihiro Nagao
Biological membranes are composed of complex mixtures of lipids and proteins that influence each other's structure and function. The biological activities of many channel-forming peptides and proteins are known to depend on the material properties of the

Copper-binding anticancer peptides from the piscidin family: an expanded mechanism that encompasses physical and chemical bilayer disruption

June 16, 2021
Author(s)
Fatih Comert, Frank N. Heinrich, Ananda Chowdhury, Mason Schoeneck, Caitlin Darling, Kyle Anderson, M. Daben J. Libardo, Alfredo Angeles-Boza, Vitalii I. Silin, Myriam Cotten, Mihaela Mihailescu
In the search for novel broad‑spectrum therapeutics to fight chronic infections, inflammation, and cancer, host defense peptides (HDPs) have garnered increasing interest. Characterizing their biologically‑active conformations and minimum motifs for

Probing Clustering Dynamics between Silicon and PAA or LiPAA Slurries under Processing Conditions

June 3, 2021
Author(s)
Mary Burdette-Trofimov, Beth Armstrong, Ryan Murphy, Luke Heroux, Mathieu Doucet, Alexander Rogers, Gabriel Veith
This work explores the complex interplay between slurry aggregation, agglomeration, and conformation (i.e. shape) of poly(acrylic acid) (PAA) and lithiated poly(acrylic acid) (LiPAA) based silicon slurries as a function of shear rate, and the resulting

Biodegradable Zwitterionic Poly(Carboxybetaine) Microgel for Sustained Delivery of Antibodies with Extended Stability and Preserved Function

June 2, 2021
Author(s)
Amir Erfani, Abanoub Hanna, Payam Zarrintaj, Saeed Manouchehri, Katie Weigandt, Clint P. Aichele, Joshua D. Ramsey
Many recent innovative treatments are based on monoclonal antibodies (mAbs) and other protein therapies. Nevertheless, sustained subcutaneous, oral or pulmonary delivery of such therapeutics are limited by the poor stability, short half-life, and non

Imaging with Neutrons

June 1, 2021
Author(s)
Daniel Hussey, Gilberto Artioli
By exploiting the penetration and scattering properties of neutrons, images of matter in two or three dimensions reveal information unobtainable with other probes. Despite the limitation in brilliance of neutron sources, several neutron-based imaging

Chopped Cold Neutron Beam Activation Analysis

May 17, 2021
Author(s)
Danyal J. Turkoglu, Heather H. Chen-Mayer
A linear fast neutron beam chopper has been deployed at the prompt gamma activation analysis instrument, enabling in-beam activation analysis of short-lived (T1/2 > 10 ms) neutron capture products without needing sample transfer. This paper describes the

An Optical Investigation of the Heavy Fermion Normal State in Superconducting UTe 2

May 11, 2021
Author(s)
Sirak Mekonen, Chang-Jong Kang, Dipanjan Chaudhuri, David Barbalas, Sheng Ran, Gabriel Kotliar, Nicholas Butch, N. Armitage
The recently discovered superconductor, UTe 2, has attracted immense scientific interest due to the experimental observations that suggest odd-parity superconductivity. It is believed that the material becomes a heavy-fermion metal at low temperatures

Compact Thermal Actuation by Water and Flexible Hydrophobic Nanopore

April 29, 2021
Author(s)
Miroslaw Chorazewski
Efficient and compact energy conversion is at the heart of sustainable development of humanity. In this work it is demonstrated that hydrophobic flexible nanoporous materials can be used for thermal-to-mechanical energy conversion when coupled with water

A Rod-Packing Hydrogen-Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation

April 26, 2021
Author(s)
Xu Zhang, Jia-Xin Wang, Libo Li, Jiyan Pei, Rajamani Krishna, Hui Wu, Wei Zhou, Guodong Qian, Bin Li, Banglin Chen
The discovery of new materials for separating ethane (C 2H 6) from ethylene (C 2H 4) by adsorption is a critical enterprise in the chemical industry. It still remains as a daunting challenge to target both high C 2H 6 adsorption capacity and gas

Superconductivity in Co-Layered LaCoSi

April 22, 2021
Author(s)
Zhengwen He, Rongjin Huang, Kaiyao Zhou, Ye Liu, Shibin Guo, Yuzhu Song, Zhongnan Guo, Shuxian Hu, Lunhua He, Qingzhen Huang, Laifeng Li, Jingyan Zhang, Shouguo Wang, Jiangang Guo, Xianran Xing, Jun Chen

A portable triaxial cell for beamline imaging of rocks under triaxial state of stress

April 21, 2021
Author(s)
Amer Syed, Yukie Tanino, Jacob LaManna, David L. Jacobson, Daniel S. Hussey, Eli Baltic, Genoveva Burca
With recent developments in direct imaging techniques using x-ray and neutron imaging, there is an increasing need for an efficient design of a test setup to study mechanical and/or the transport behaviour of porous rocks. Bespoke design from commercial

Accurate measurement of the through-plane water content of proton-exchange membranes using neutron radiography

April 21, 2021
Author(s)
Daniel S. Hussey, David L. Jacobson, Dusan Spernjak, Adam Weber, Rangachary Mukundan, Joseph Fairweather, Eric Brosha, John Davey, Jacob Spendelow, Rodney Borup
The water sorption of proton-exchange membranes (PEMs) was measured in situ using high-resolution neutron imaging in small-scale fuel-cell test sections. A detailed characterization of the measurement uncertainties and corrections associated with the

Average Soil Water Retention Curves Measured by Neutron Radiography

April 21, 2021
Author(s)
Daniel S. Hussey, David L. Jacobson, Chu-lin Cheng, Misun Kang, Juske Horita, sophie voisin, Hassina Bilheux, Warren Jeffery, Edward Perfect
Water retention curves are essential for understanding the hydrologic behavior of partially- saturated porous media and modeling flow transport processes within the vadose zone. In this paper we report direct measurements of the main drying and wetting

Demonstration of focusing Wolter mirrors for neutron phase and magnetic imaging

April 21, 2021
Author(s)
Daniel S. Hussey, Han Wen, Huarui Wu, Thomas R. Gentile, Wangchun Chen, David L. Jacobson, Jacob LaManna, B. Khaykovich
Image-forming focusing mirrors were employed to demonstrate two different modalities of neutron imaging, phase imaging with a far-field interferometer, and magnetic-field imaging through the manipulation of the neutron beam polarization. For the phase

Demonstration of Small-Angle Neutron Scattering Measurements with a Nested Neutron-Focusing Supermirror Assembly

April 21, 2021
Author(s)
Huarui Wu, Zhiyuan Wang, Yao Zhang, Wenbo Mo, Pulin Bai, Kun Song, Zhong Zhang, Zhanshan Wang, Daniel S. Hussey, Yun Liu, Zhe Wang, Xuewu Wang
Neutron-focusing mirrors with both a nested structure and supermirror coatings enable a large collecting area, and consequently a large neutron current gain for mirror-based instruments. A nested neutron-focusing supermirror assembly has been fabricated
Displaying 226 - 250 of 910
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