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NIST Authors in Bold

Displaying 3226 - 3250 of 3362

International Comparison, Final Summary Report

November 1, 2000
Author(s)
James P. Randa
An international comparison of noise temperature of coaxial (GPC-7) sources at 2 GHz, 4 GHz and 12 GHz has been completed. Participating laboratories included the Physikalisch-Technische Bundesanstalt (PTB); the Bureau National de Metrologie-Laboratoire

Top-Down Scoring of Spectral Fitness by Image Analysis for Protein Structure Validation

May 6, 2025
Author(s)
Benjamin Harding, Barry DeZonia, Rajat Garg, Ziling Hu, Frank Delaglio, Tim Grant, Chad Rienstra
Nuclear magnetic resonance (NMR) spectroscopy is a powerful technique for protein structure determination, but traditional approaches require extensive manual assignment of hundreds to thousands of resonances. Here we present NMRFAM-BPHON, a novel "top

Visualizing the merger of tunably coupled graphene quantum dots

December 6, 2023
Author(s)
Daniel Walkup, Fereshte Ghahari, Steven R. Blankenship, Kenji Watanabe, Takashi Taniguchi, Nikolai Zhitenev, Joseph A. Stroscio
Coupled quantum dots have been realized in a wide variety of physical systems and have attracted interest for many different applications. Here, we examine novel graphene quantum dots in backgated devices on hBN, and visualize their merger using scanning

Untargeted metabolomics analyses and contaminant chemistry of Dreissenid mussels at the Maumee River Area of Concern in the Great Lakes

November 22, 2023
Author(s)
Tracey Schock, Daniel Bearden, Fabio Casu, Michael Edwards, Annie Jacob, Edward Johnson, Amanda Bayless, Elena Legrand
Bivalves stand out as an ideal ecological indicator and have been the basis of NOAA's Mussel Watch Program to monitor environmental health. In this study, we aimed to investigate the health of the Dreissenid mussel in the Maumee River. In addition to the

Multi-omics characterization of NIST seafood reference materials and alternative matrix preparations

September 18, 2023
Author(s)
Debra Ellisor, Amanda Bayless, William Davis, Tracey Johnston, Benjamin Trey Knott, John Seghers, Hanne Leys, Hakan Emteborg
The National Institute of Standards and Technology (NIST) has prepared four seafood reference materials (RMs) for use in food safety and nutrition studies: wild-caught and aquacultured salmon (RM 8256 and RM 8257) and wild-caught and aquacultured shrimp

Structural Fingerprinting of siRNA Therapeutics by Solution NMR Spectroscopy

August 4, 2022
Author(s)
Owen Becette, Anh Tran, Jace Jones, John Marino, Robert Brinson
Nucleic acids are an increasingly popular platform for the development of biotherapeutics to treat a wide variety of illnesses, including diseases where traditional drug development efforts have failed. To date, there are 14 short oligonucleotide

Opportunities in electrically tunable 2D materials beyond graphene: Recent progress and future outlook

November 30, 2021
Author(s)
Tom Vincent, Jiayun liang, simrjit singh, eli castanon, xiaotian zhang, deep jariwala, olga kazakova, zakaria al-balushi, Amber McCreary
The interest in two-dimensional and layered materials continues to expand, driven by the compelling properties of individual atomic layers that can be stacked and/or twisted into synthetic heterostructures. The plethora of electronic properties as well as

Topological Frequency Combs and Nested Temporal Solitons

August 5, 2021
Author(s)
Sunil Mittal, Gregory Moille, Kartik Srinivasan, Yanne Chembo, Mohammad Hafezi
Recent advances in realizing optical frequency combs using nonlinear parametric processes in integrated photonic resonators have revolutionized on-chip optical clocks, spectroscopy, and multi channel optical communications. At the same time, the

A System for Validating Resistive Neural Network Prototypes

July 27, 2021
Author(s)
Brian Hoskins, Mitchell Fream, Matthew Daniels, Jonathan Goodwill, Advait Madhavan, Jabez J. McClelland, Osama Yousuf, Gina C. Adam, Wen Ma, Muqing Liu, Rasmus Madsen, Martin Lueker-Boden
Building prototypes of heterogeneous hardware systems based on emerging electronic, magnetic, and photonic devices is an increasingly important area of research. On the face of it, the novel implementation of these systems, especially for online learning

Designing 3D printable cementitious materials with gel-forming polymers

December 11, 2020
Author(s)
Edward Garboczi, Hajar Taheri Afarani, William carroll, Joseph J. Biernacki
Cement based pastes for 3D printing applications were prepared using hydrogel-forming polymers. Preliminary results suggest that such gel-forming polymers can reduce the need for more complex admixture packages as printing aids. The influence of polymer

Local negative permittivity and topological-phase transition in polar skyrmions

October 12, 2020
Author(s)
Sujit Das, Zijian Hong, Vladimir Stoica, Mauro A. Goncalves, Yu-Tsun Shao, Eric Parsonnet, Eric J. Marksz, Sahar Saremi, Margaret McCarter, A Reynoso, Chris Long, Aaron Hagerstrom, D Meyers, V Ravi, B Prasad, H Zhou, Z Zhang, H Wen, F Gomez-Ortiz, P Garcia-Fernandez, J Bokor, J Iniguez, J Freeland, Nate Orloff, J Junquera, Long-Qing Chen, Sayeef Salahuddin, David A. Muller, L Martin, R. Ramesh
Topological solitons such as magnetic skyrmions have drawn enormous attention as stable quasi- particle-like objects. The recent discovery of polar vortices and skyrmions in ferroelectric- oxide superlattices, exhibiting exotic physical phenomena, has

Experimental and Theoretical Evidence of Hydrogen Doping in Solution Processed Indium Gallium Oxide via Polymer Incorporation

July 23, 2020
Author(s)
Wei Huang, Joshua Tedesco, Po-Hsiu Chien, Kyle McMillen, Li Zeng, Subhrangsu Mukherjee, Binghao Wang, Yao Chen, Gang Wang, Yang Wang, Yanshan Gao, Michael Bedzyk, Dean DeLongchamp, Julia E. Medvedeva, Yan-Yan Hu, Tobin Marks, Antonio Facchetti
Aqueous solution processed high performance indium gallium oxide (IGO) thin-film transistors (TFTs) are realized by the simple addition of a hydroxyl (C-OH) containing polymer [polyvinyl alcohol (PVA)] into an IGO precursor solution. The field-effect

Chiral Superconductivity in Heavy-Fermion Metal UTe 2

March 24, 2020
Author(s)
Lin Jiao, Sean Howard
Spin-triplet superconductivity is a condensate of electron pairs with spin-1 and an odd parity pair wavefunction 1. A particularly interesting manifestation of triplet pairing is a chiral p-wave state which is topologically non-trivial and a natural

X-Ray Nanodiffraction Studies of Ionically Controlled Nanoscale Phase Separation in Cobaltites

August 5, 2019
Author(s)
Geoffery Rippy, Lacey Trinh, Alexander M. Kane, Aleksey L. Ionin, Michael S. Lee, Rajesh V. Chopdekar, Joyce M. Christiansen-Salameh, Dustin A. Gilbert, Alexander Grutter, Peyton D. Murray, Martin V. Holt, Zhonghou Cai, Kai Liu, Yayoi Takamura, Roopali Kukreja
Complex oxide heterostructures provide access to emergent functional and structural phases which are not present in the bulk constituent materials. In this letter, we focus on Gd/La 0.67Sr 0.33CoO 3 (LSCO) heterostructures due to the high oxygen ion

ELECTRON ENERGY-LOSS SPECTROSCOPY AND IMAGING

March 12, 2019
Author(s)
Vladimir P. Oleshko
This article describes electron energy-loss spectroscopy (EELS), energy-filtering transmission electron microscopy (EFTEM) and electron spectroscopic diffraction (ESD) in a transmission electron microscope (TEM) or in a scanning transmission electron

Optimization of Reflectometry Experiments using Information Theory

February 1, 2019
Author(s)
Bradley W. Treece, Paul A. Kienzle, David Hoogerheide, Charles Majkrzak, Mathias Loesche, Frank Heinrich
A method based on Bayesian statistics and information theory is developed to analyze the information gain Δ}H of surface-sensitive reflectometry experiments. After presenting the underlying mathematical framework and its implementation, the method is
Displaying 3226 - 3250 of 3362
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