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Neutron research

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Displaying 151 - 175 of 925

Bi 12 O 17 Cl 2 with a Sextuple Bi-O Layer Composed of Rock-Salt and Fluorite Units and its Structural Conversion through Fluorination to Enhance Photocatalytic Activity

October 10, 2022
Author(s)
Daichi Kato, Osamu Tomita, Ryky Nelson, Maria A. Kirsanova, Richard Dronskowski, Hajime Suzuki, Chengchao Zhong, Cedric Tassel, Kohdai Ishida, Yosuke Matsuzaki, Craig Brown, Koji Fujita, Kotaro Fujii, Masatomo Yashima, Yoji Kobayashi, Akinori Saeki, Itaru Oikawa, Hitoshi Takamura, Ryu Abe, Hiroshi Kageyama, Tatiana E. Gorelik, Artem M. Abakumov
Layered bismuth oxyhalides with bilayered (Bi 2O 2) fluorite slabs are promising visible-light photocatalysts because of the ability to control the valence band levels. Here we show that a structurally uncharacterized Bi 12O 17Cl 2, which has been

Structural and Biophysical Properties of Farnesylated KRas Interacting with the Chaperone SmgGDS-558

October 4, 2022
Author(s)
Dennis J. Michalak, Bethany Unger, Ellen Lorimer, Alexander Grishaev, Carol Williams, Frank N. Heinrich, Mathias Losche
KRas is a small GTPase and membrane-bound signaling protein. Newly synthesized KRas is posttranslationally modified with a membrane-anchoring prenyl group. KRas chaperones are therapeutic targets in cancer due to their participation in trafficking oncogeni

Restricting a-Synuclein Transport into Mitochondria by Inhibition of a-Synuclein-VDAC Complexation as a Potential Therapeutic Target for Parkinson's Disease Treatment

October 1, 2022
Author(s)
Megha Rajendran, Maria Queralt-Martin, Philip A. Gurnev, William M. Rosencrans, Amandine Rovini, Daniel Jacobs, Kaitlin Abrantes, David Hoogerheide, Sergey M. Bezrukov, Tatiana Rostovtseva
Involvement of alpha-synuclein (αSyn) in Parkinson's disease (PD) is complicated and difficult to trace on cellular and molecular levels. Recently we established that αSyn can regulate mitochondrial function by voltage-activated complexation with the

Fabrication of Lithium Indolide and Derivates for Ion Conduction

September 14, 2022
Author(s)
Jintao Wang, Yang Yu, Anan Wu, Khai Chen Tan, Hui Wu, Teng He, Ping Chen
Alkali-ion batteries have been widely used nowadays. The development of solid-state electrolytes (SSEs) to replace the widely used organic liquid electrolytes could effectively solve the issue of combustion due to the formation of alkali metal dendrites

Energy Broadening of Neutron Depth Profiles by Thin Polyamide Films

September 7, 2022
Author(s)
Jamie Weaver, Anna Job, Kedar Manandhar, Ichiro Takeuchi, Robert Gregory Downing
A protective covering is often required for neutron depth profiling (NDP) measurements of sensitive materials (e.g., Li-ion batteries). Addition of this layer can increase NDP profile energy broadening and depth assignment uncertainty. This study evaluates

a-Synuclein Interaction with Lipid Bilayer Discs

August 23, 2022
Author(s)
Marija Dubackic, Yun Liu, Elizabeth Kelley, Crispin Hetherington, Michael Haertlein, Juliette Devos, Sara Linse, Emma Sparr, Ulf Olsson
α-Synuclein (aSyn) is a 140 residue long protein that is present in presynaptic termini of nerve cells. The protein is also pathologically associated with Parkinson's disease, where it has been found to self-assemble into long amyloid fibrils forming

Relative effects of polymer composition and sample preparation on glass dynamics

August 17, 2022
Author(s)
Christopher Soles, Amanda L. Forster, Katherine Evans, Madhusudan (Madhu) Tyagi, Robert M. Elder, Timothy Sirk, Joseph Dennis, Kanae Ito, Osama Yamamuro, Hiroshi Akiba
Modern design of common adhesives, composites and polymeric parts makes use of polymer glasses that are stiff enough to maintain their shape under a high stress while still maintaining a ductile behavior after the yield point. Typically, material

The Single Residue K12 Governs the Exceptional Voltage Sensitivity of Mitochondrial Voltage-Dependent Anion Channel Gating

August 17, 2022
Author(s)
Van Ngo, Maria Queralt-Martin, Farha Khan, Lucie Bergdoll, Jeff Abramson, Sergey M. Bezrukov, Tatiana Rostovtseva, David Hoogerheide, Sergei Noskov
The voltage-dependent anion channel (VDAC) is a β-barrel channel of the mitochondrial outer membrane (MOM) that passively transports ions, metabolites, polypeptides, and single-stranded DNA. VDAC responds to a transmembrane potential by transitioning to a

The Effect of Transverse Wavefront Width on Specular Neutron Reflection

August 1, 2022
Author(s)
Charles Majkrzak, Norman F. Berk, Brian B. Maranville, Joseph Dura, Terrence J. Jach
In the analysis of neutron scattering measurements of condensed matter structure, it normally suffices to treat the incident and scattered neutron beams as if composed of incoherent distributions of plane waves with wavevectors of different magnitudes and

Does ITZ influence moisture transport in concrete?

July 24, 2022
Author(s)
Laura E. Dalton, Jacob LaManna, Scott Jones, Mohammad Pour-Ghaz
The contributions of the interfacial transition zone (ITZ) to mass transport in cement-based materials remain ambiguous and disputed. In this study, the neutron and X-ray tomography (NeXT) system is used to capture unsaturated moisture flow in a concrete

Electrostatic Repulsion Slows Relaxations of Polyelectrolytes in Semidilute Solutions

July 19, 2022
Author(s)
Ali Slim, Winnie Shi, Farshad S. Samghabadi, Antonio Faraone, Amanda Marciel, Ryan Poling-Skutvik, Jacinta Conrad
We investigate the structure and dynamics of unentangled semidilute solutions of sodium polystyrene sulfonate (NaPSS) using small-angle neutron scattering (SANS) and neutron spin-echo (NSE) spectroscopy. The effects of electrostatic interactions and chain

Unraveling the Stable Cathode Electrolyte Interface in all Solid-State Thin-Film Battery Operating at 5 V

July 4, 2022
Author(s)
Ryosuke Shimizu, Diyi Cheng, Jamie Weaver, Minghao Zhang, Bingyu Lu, Thomas Wynn, Randall Burger, Min-cheol Kim, Guomin Zhu, Ying Shirley Meng
Spinel-type LiNi0.5Mn1.5O4 (LNMO) is one of the most promising 5 V-class cathode materials for Li-ion batteries that can achieve high energy density and low production costs. However, in liquid electrolyte cells, the high voltage causes continuous cell

Results from neutron imaging phase change experiments with LH2 and LCH4

July 2, 2022
Author(s)
Kishan Bellur, Ezequiel Medici, Daniel Hussey, David Jacobson, Jacob LaManna, Juscelino Leao, Julia Scherschligt, James Hermanson, Chang Kyoung Choi, Jeffrey Allen
Predicting evaporation and cryo-storage behavior of liquid hydrogen poses a challenge for both terrestrial energy infrastructure and long term space missions. The current understanding of cryogenic phase change and subsequent boil-off is limited, in part

EXPANSE: A time-of-flight EXPanded Angle Neutron Spin Echo spectrometer at the Second Target Station of the Spallation Neutron Source

July 1, 2022
Author(s)
Changwoo Do, Rana Ashkar, Cristina Boone, Wei-Ren Chen, Georg Ehlers, Peter Falus, Antonio Faraone, Jason Gardner, Van Graves, Thomas Huegle, Reika Katsumata, Darian Kent, Jiao Lin, Bill Mchargue, Bradley D. Olsen, Yangyang Wang, Danielle Wilson, Y. Z.
EXPANSE, an EXPanded Angle Neutron Spin Echo instrument, has been proposed and selected as one of the first suite of instruments to be built at the Second Target Station of the Spallation Neutron Source at the Oak Ridge National Laboratory. This instrument

Polyoxocationic Antimony Oxide Cluster with Acidic Protons

June 17, 2022
Author(s)
Yuki Watanabe, Kim Hyeon-Deuk, Takafumi Yamamoto, Masayoshi Yabuuchi, Olesia M. Karakulina, Yasuto Noda, Takuya Kurihara, I-Ya Chang, Masanobu Higashi, Osamu Tomita, Cedric Tassel, Daichi Kato, Jingxin Xia, Tatsuhiko Goto, Craig Brown, Yuto Shimoyama, Naoki Ogiwara, Joke Hadermann, Artem M. Abakumov, Sayaka Uchida, Ryu Abe, Hiroshi Kageyama
The success and continued expansion of research in polyoxometalates (POMs) owe largely to their structural richness and wide range of functions. However, while most POM clusters known to date are negatively charged, there is only a handful of cationic POMs
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