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Search Publications

NIST Authors in Bold

Displaying 326 - 350 of 74014

Tracking Active Phase Behavior on Boron Nitride during the Oxidative Dehydrogenation of Propane Using Operando X-Ray Raman Spectroscopy

November 6, 2023
Author(s)
Melissa Cendejas, Oscar Paredes Mellone, Unni Kurumbail, Zisheng Zhang, Jacob Jansen, Faysal Ibrahim, Son Dong, John Vinson, Anastassia Alexandrova, Dimosthenis Sokaras, Simon Bare, Ive Hermans
Hexagonal boron nitride (hBN) is a highly selective catalyst for the oxidative dehydrogenation of propane (ODHP) to propylene. Using a variety of ex situ characterization techniques, the activity of the catalyst has been attributed to the formation of an

ASTRA: a Transition-Density-Matrix Approach to Molecular Ionization

November 3, 2023
Author(s)
Luca Argenti, Juan Martin Randazzo, carlos maranthe, Jeppe Olsen, Siddhartha Chattopadhyay, Barry I. Schneider
We describe ASTRA (AttoSecond TRAnsitions), a new close-coupling approach to molecular ionization that uses many-body transition density matrices between ionic states with arbitrary spin and symmetry, in combination with hybrid integrals between Gaussian

Digital Twin Core Conceptual Models and Services

November 3, 2023
Author(s)
Shi-Wan Lin, Kym Watson, Guodong Shao, Ljiljana Stojanovic, Bassam Zarkout
To improve operational efficiency and enhance competitiveness in business, organizations are broadly undergoing digital transformation. As a foundation for digital transformation, digital twins enable system operators to dynamically represent, diagnose

Linkage Transformations in a Three-Dimensional Covalent Organic Framework for High-Capacity Adsorption of Perfluoroalkyl Substances

November 3, 2023
Author(s)
Andrea Zeppuhar, Devin Rollins, Dale L. Huber, Emmanuel Bazan-Bergamino, Fu Chen, Hayden Evans, Mercedes Taylor
Despite their many advantages, covalent organic frameworks (COFs) built from three-dimensional monomers are synthetically difficult to functionalize. Herein, we provide a new synthetic approach to the functionalization of a three-dimensional covalent

Long Range and Collective Impact of Au Surface Adatoms on Nanofin Growth

November 3, 2023
Author(s)
Babak Nikoobakht, Aaron Johnston-Peck, Jerry Tersoff
In the Au-catalyzed vapor-liquid-solid (VLS) growth of semiconductor nanowires, individual Au nanodroplets can result in single nanowires per site. However, growth of single nanofins per site using the same process becomes unpredictable. Our results show

Partial Elastic Shape Registration of 3D Surfaces using Dynamic Programming

November 3, 2023
Author(s)
Javier Bernal, James F. Lawrence
The computation of the elastic shape registration of two simple surfaces in 3−dimensional space and therefore of the elastic shape distance between them has been investigated by Kurtek, Jermyn, et al. who have proposed algorithms to carry out this

Annual Report on the U.S. Manufacturing Economy: 2023

November 2, 2023
Author(s)
Douglas Thomas
This report provides a statistical review of the U.S. manufacturing industry. There are three aspects of U.S. manufacturing that are considered: (1) how the U.S. industry compares to other countries, (2) the trends in the domestic industry, and (3) the

Recommendations for setting a criterion and assessing commutability of sample materials used in external quality assessment/proficiency testing schemes

November 2, 2023
Author(s)
Sverre Sandberg, Pernille Fauskanger, Jesper Johansen, Thomas Keller, Jeffrey Budd, Neil Greenberg, robert rej, MAURO PANTEGHINI, VINCENT DELATOUR, Ferruccio Ceriotti, Liesbet Deprez, Johanna Camara, Finlay MacKenzie, Alicia Lyle, Eline van der Hagen, Chris Burns, W. Greg Miller
It is important for external quality assessment materials (EQAMs) to be commutable with clinical samples; i.e., they should behave like clinical samples when measured using end-user clinical laboratory in vitro diagnostic medical devices (IVD-MDs). Using

Watching (De)Intercalation of 2D Metals in Epitaxial Graphene: Insight into the Role of Defects

November 2, 2023
Author(s)
Falk Niefind, Qian Mao, Nadire Nayir, Malgorzata Kowalik, Jungjoon Ahn, Andrew Winchester, Chengye Dong, RINU ABRAHAM MANIYARA, Joshua A. Robinson, Adri van Duin, Sujitra Pookpanratana
The de-intercalation processes of 2D Ag and 2D Ga from the graphene-SiC interface was tracked using full-field photoemission electron microscopy. The intercalation "windows" are observed in both systems and follow very different dynamics. The de- and re

Dietary Supplement Laboratory Quality Assurance Program: Exercise 1 Final Report

November 1, 2023
Author(s)
Carolyn Burdette, Hugh Hayes, Jenna Klingsick, Colleen E. Bryan Sallee, Charles Barber, Steven J. Christopher, Lee L. Yu
The DSQAP was launched, in collaboration with the NIH ODS, in 2007. The program was established to enable laboratories to improve the accuracy of measurements in samples for nutrients, marker compounds, toxic elements, and/or contaminants in dietary

Divalent ions as mediators of carbonylation in cardiac myosin binding protein C

November 1, 2023
Author(s)
Christina Bergonzo, Baikuntha Aryal, Ashutosh Rao
The dosing and efficacy of chemotherapeutic drugs can be limited by toxicity caused by off-pathway reactions. One hypothesis for how such toxicity arises is via metal-catalyzed oxidative damage of cardiac myosin binding protein C (cMyBP-C) found in cardiac

NIST SI Units Card Deck

November 1, 2023
Author(s)
Dinelka Jagoda, Elizabeth Benham
Welcome to the SI Units Card Deck! This interactive educational activity offers a fun way for students to enhance their understanding of the International System of Units (SI), including the Defining Constants, Base Units, Derived Units with Special Names

Superconducting X-ray Sensors for Tomography of Microelectronics

November 1, 2023
Author(s)
Joseph Fowler, Zachary H. Levine, Paul Szypryt, Daniel Swetz
Tomographic imaging of integrated circuits at scales smaller than 1 micrometer is a challenging x-ray measurement. We describe a research instrument based upon superconducting x-ray microcalorimeters, which help to discriminate among materials in a sample

High-Pressure Vapor-Liquid Equilibrium Measurements of Methane + Water Mixtures by Nuclear Magnetic Resonance Spectroscopy

October 31, 2023
Author(s)
Samantha Miller, Chris Suiter, Mark O. McLinden, Jason A. Widegren, Nancy Levinger, Bret Windom, Michael Sartini
Accurate vapor-liquid equilibrium (VLE) data are required to predict the condensation of low-volatility components in natural gas pipelines. Here we apply 1H nuclear magnetic resonance (NMR) spectroscopy to measure the VLE of methane + water mixtures at

Modeling of hierarchical solidification microstructures in metal additive manufacturing: Challenges and opportunities

October 31, 2023
Author(s)
Dilip K. Banerjee, Supriyo Ghosh, Julien Zollinger, Miha Zaloznik, Christopher Newman, Raymundo Arroyave
Metal-based additive manufacturing (AM) processes often produce parts with improved properties compared to conventional manufacturing and metal working routes. However, currently, only a few alloys can be reliably additively manufactured as the vast

Superconducting Nanowire Single-Photon Detector Arrays for the Near- to Mid-Infrared

October 31, 2023
Author(s)
Benedikt Hampel, Richard Mirin, Sae Woo Nam, Varun Verma
Superconducting Nanowire Single-Photon Detectors (SNSPDs) are excellent devices for the analysis of faint light from the ultraviolet to the mid-infrared. Recent developments push their broad wavelength bandwidth further into the mid-infrared towards 20 μm
Displaying 326 - 350 of 74014