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Search Publications

NIST Authors in Bold

Displaying 6951 - 6975 of 73697

Field-Induced Topological Hall Effect and Double-Fan Spin Structure with a c-Axis Component in the Metallic Kagome Antiferromagnetic Compound YMn 6 Sn 6

January 12, 2021
Author(s)
Qi Wang, Kelly J. Neubauer, Chunruo Duan, Qiangwei Yin, Satoru Fujitsu, Hideo Hosono, Feng Ye, Rui Zhang, Songxue Chi, Kathryn L. Krycka, Hechang Lei, Pengcheng Dai
The geometrical frustration nature of the kagome lattice makes it a great host to flat electronic band, non-trivial topological properties, and novel magnetisms. Metallic kagome antiferromagnet YMn 6Sn 6 exhibits the topological Hall effect (THE) when an

Off-stoichiometric semiconductors Cu1.33+xZn1.33-xIn1.33Se4 (x = 0, 0.1, 0.2 and 0.3): Synthesis, structure, and thermal and electrical properties

January 12, 2021
Author(s)
Alzahrani Noha, Hagen Poddig, Hsin Wang, Joshua Martin, Wencong Shi, Lilia M. Woods, George S. Nolas
The synthesis, structure, and temperature dependent thermal and electrical properties of off-stoichiometric polycrystalline modified zinc blende quaternary chalcogenides Cu1.33+xZn1.33-xIn1.33Se4, where x ​= ​0, 0.1, 0.2 and 0.3, are investigated

Recent advances in superconducting nanowire single-photon detector technology for exoplanet transit spectroscopy in the mid-infrared

January 12, 2021
Author(s)
Varun Verma, Jeff Chiles, Adriana Lita, Richard Mirin, Sae Woo Nam, Yao Zhai, Adam McCaughan, Emma Wollman, Alexander Walter, Boris Korzh, Jason Allmaras, Ekkehart Schmidt, S. Frasca, Matthew Shaw
Superconducting nanowire single-photon detectors, or SNSPDs, have become the highest-performing class of single-photon detectors in the near-IR. At telecom wavelengths, SNSPDs have demonstrated detection effi- ciency above 95%, intrinsic dark count rates

Selective Filling of n-Hexane in a Tight Nanopore

January 12, 2021
Author(s)
Jeffrey Fagan, Haoran Qu, Archith Rayabharam, Narayana Aluru, Xiaojian Wu, Peng Wang, Yunfeng Li, YuHuang Wang
Molecular sieving may occur when two similarly sized molecules compete for a nanopore. This size-selectivity generally favors the adsorption of molecules with smaller kinetic diameter into the pore while excluding larger ones. In nearly all known examples

Design of a novel, native-like secreted form of the hepatitis C virus E1E2 heterodimer

January 11, 2021
Author(s)
Johnathan D. Guest, Ruixue Wang, Khadija Elkholy, Andrezza Chagas, Kinlin L. Chao, Thomas Cleveland, Young C. Kim, Zhen-Yong Keck, Alexander Marin, Roy Mariuzza, Alexander K. Andrianov, Eric A. Toth, Steven Foung, Brian Pierce, Thomas R. Fuerst
Hepatitis C virus (HCV) is a major worldwide health burden, and a preventive vaccine is needed for global control or eradication of this virus. A substantial hurdle to an effective HCV vaccine is the high variability of the virus, leading to immune escape

Entropic-based separation of diastereomers. Size-exclusion chromatography with on-line viscometry and refractometry detection for analysis of blends of mannose and galactose methyl-alpha-pyranosides at "ideal" size-exclusion conditions

January 11, 2021
Author(s)
Andre M. Striegel, Steven Trainoff
TThe separation of carbohydrate diastereomers by an ideal size-exclusion mechanism, i.e., in the absence of enthalpic contributions to the separation, can be considered one of the grand challenges in chromatography: Can a difference in the location of a

Characteristics and Mechanisms of Hydrogen-Induced Quasi-Cleavage Fracture of Lath Martensitic Steel

January 10, 2021
Author(s)
Lawrence Cho, Peter E. Bradley, Damian S. Lauria, May L. Martin, Matthew J. Connolly, Jake Benzing, Eun Jung Seo, Kip O. Findley, John G. Speer, Andrew J. Slifka
This study presents an in-depth characterization of the microstructures, crystallographic orientations, and dislocation characteristics beneath the hydrogen-induced quasi-cleavage features of an as-quenched, lath martensitic (') 22MnB5 steel. The fracture

Influence of bearing ball recirculation on error motions of linear axes

January 10, 2021
Author(s)
Gregory W. Vogl, Kyle F. Shreve, Alkan Donmez
For positioning systems utilizing linear guides and trucks with recirculating balls, a method is presented that uses the measured total error motions and the measured phase of ball loops within trucks to determine the influence of each ball loop on the

Conduction Band Control of Oxyhalides with a Triple-Fluorite Layer for Visible Light Photocatalysis

January 8, 2021
Author(s)
Akinobu Nakada, Daichi Kato, Hikaru Takahira, Masayoshi Yabuuchi, Masanobu Higashi, Hajime Suzuki, Maria Kirsanova, Naoji Kakudou, Cedric Tassel, Takafumi Yamamoto, Craig Brown, Akinori Saeki, Artem M. Abakumov, Hiroshi Kageyama, Ryu Abe
Compounds with fluorite-type Bi 2O 2 layers display various properties due to stereoactive Bi-ions. Bi 2O 2-based oxyhalides are promising visible-light photocatalysts, where several strategies have been demonstrated to control the valence band maximum

DNA Origami Design: A How-To Tutorial

January 8, 2021
Author(s)
Jacob Majikes, James Alexander Liddle
While the design and assembly of DNA origami are straightforward, its relative novelty as a nanofabrication technique means that the tools and methods for designing new structures have not been codified as well as they have for more mature technologies

The Character of Residential Cooktop Fires

January 8, 2021
Author(s)
Yue Hu, Jian Chen, Zhigang Wang, Ki Yong Lee, Matthew Bundy, Anthony Hamins, Marco G. Fernandez
A series of experiments was conducted to investigate the pre-combustion and combustion properties of corn oil heated in pans from 10 cm to 26 cm diameter by a residential electric- coil element cooktop. For comparison, torch-ignited gasoline, heptane and

Comparison of measured and simulated spin-wave mode spectra of magnetic nanostructures

January 6, 2021
Author(s)
Hans Nembach, Robert McMichael, Michael Schneider, Justin Shaw, Thomas J. Silva
Motivated by the importance of magnetization dynamics in nanomagnets for the development and optimization of magnetic devices and sensors, we measured and modeled spin wave spectra in patterned elliptical nanomagnets. Ferromagnetic resonance spectra for

State Readout of a Trapped Ion Qubit Using a Trap-integrated Superconducting Photon Detector

January 6, 2021
Author(s)
Susanna L. Todaro, Varun Verma, Katherine C. McCormick, David T. Allcock, Richard Mirin, David J. Wineland, Sae Woo Nam, Andrew C. Wilson, Dietrich Leibfried, Daniel Slichter
We detect fluorescence photons emitted by a single $^9$Be$^+$ ion confined in a surface- electrode rf ion trap, using a superconducting nanowire single photon detector integrated directly into the trap. We achieve a qubit readout fidelity of 99.91(1) %

White-Box Evaluation of Fingerprint Matchers: Robustness to Minutiae Perturbations

January 6, 2021
Author(s)
Steven Grosz, Joshua J. Engelsma, Nicholas G. Paulter Jr., Anil K. Jain
Prevailing evaluations of fingerprint recognition systems have been performed as end-to-end black-box tests of fingerprint identification or authentication accuracy. However, performance of the end-to-end system is subject to errors arising in any of its
Displaying 6951 - 6975 of 73697
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