U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 1 - 25 of 143596

Sensitivity Study of Operating Conditions and Liquid Water Transport Behavior in an AEMFC Aided by Modeling and Neutron Radiography

June 1, 2025
Author(s)
Mrittunjoy Sarker, Felipe Mojica, Ami Neyerlin, Bryan Pivovar, Daniel Hussey, Jacob LaManna, David Jacobson, Po-Ya Chuang
Two types of anion exchange ionomers, powder and dispersion, are studied in this work. The gas diffusion electrode (GDE) with the dispersion-type ionomer exhibits strong hydrophobicity, thus not enabling sufficient ionic exchange during the potassium

NIST Special Publication 260 NIST.SP.260-256 Certification of Standard Reference Material(R)s 3672a & 3673a: Organic Contaminants in Smokers' Urine (Frozen) & Organic Contaminants in Non-Smokers' Urine (Frozen)

May 14, 2025
Author(s)
Ashley Russell, Carolyn Burdette, Johanna Camara, Nathanael Heckert, Jennifer Hoguet, Kevin Huncik, Jared Ragland, Elena Wood
Standard Reference Material (SRM) 3672a Organic Contaminants in Smokers' Urine (Frozen) and SRM 3673a Organic Contaminants in Non-Smokers' Urine (Frozen) are intended for use in evaluating analytical methods for the determination of selected naturally

Selecting longitudinal community outcomes for resilience indicator validation

May 13, 2025
Author(s)
Donghwan Gu, Maria Dillard, Michael Gerst, Jarrod Loerzel
Assessing community resilience is a long-sought goal in multiple fields of study and practice. Community resilience frameworks have been designed to estimate the level of resilience through varying sets of cross-sectional indicators. However, community

A Fully Registered In-Situ and Ex-Situ Dataset for Metal Powder Bed Fusion Additive Manufacturing: Data Processing, Feature Extraction, Registration, and Uncertainties

May 8, 2025
Author(s)
Zhuo Yang, Yan Lu, Ho Yeung, Brandon Lane, Nicole Van Handel
This document details the data registration process for the previously published datasets from Additive Manufacturing Metrology Testbed (AMMT) parts, "Overhang Part X4," generated at the National Institute of Standards and Technology. The two datasets —one

Broadband Optoelectronic Mixer for Terahertz Frequency-Comb Measurements

May 5, 2025
Author(s)
Jizhao Zang, Jesse Morgan, Andreas Beling, Scott Papp
We demonstrate ultra-broadband optoelectronic mixing of frequency combs that provides phase-coherent detection of a repetition frequency up to 500 GHz, using a high-speed modified uni-traveling carrier (MUTC) photodiode. Nonlinear photo-electron effects in

China's Manufacturing Innovation Centers: A Benchmarking Report for the Manufacturing USA Network

May 5, 2025
Author(s)
Michael Molnar, Kelley Rogers, Frank Gayle, Susan Ipri-Brown, Mai Tran, Joseph Long, Clifton Ray, Albert Shih, Douglas Thomas
This review of China's Manufacturing Innovation Centers (MICs) describes the status of the country's flagship manufacturing innovation program. At least 33 MICs have been established to date, suggesting that China is within reach of its goal of 40 MICs by

NIST GenAI (Pilot): an Overview of Text-to-Text Evaluation Results

May 5, 2025
Author(s)
Yooyoung Lee, Hariharan Iyer
The 2024 NIST Generative AI (GenAI) Pilot Study focuses on evaluating text-to-text (T2T) generation and discrimination tasks to assess the capabilities and limitations of generative AI models. The study aims to measure the effectiveness of AI-generated

Certification of Standard Reference Material(R) 1989 Monodisperse Irregularly Shaped Epoxy-Based Particles (Nominal 100 mm, 150 mm, 220 mm)

May 2, 2025
Author(s)
Srivalli Telikepalli, Dean Ripple, Michael Carrier, Kristen Steffens, David Newton, Christopher Montgomery, Nicholas Ritchie, Anthony Asmar, Michael Halter
Standard Reference Material (SRM) 1989 is a NIST particle standard produced using photolithographic methods and delivers a certified value for particle size of an irregularly shaped particle. This SRM was developed to allow a more accurate monitoring of

A re-assessment of archived (1989-2006) beluga liver from the North American Arctic with non-targeted analysis reveals brominated chemicals of emerging concern

May 1, 2025
Author(s)
Jacqueline Bangma, Chris Fuller, James McCord, Heather Whitehead, Richard Liberatore, Jason Boettger, Amanda Moors, Rebecca Pugh, Steven O'Connell, Jessica Reiner
In 2011, 68 archived beluga whale (Delphinapterus leucas) liver samples collected from Cook Inlet and the eastern Chukchi Sea from 1989 to 2006 were characterized for 12 per- and polyfluoroalkyl substances (PFAS) using targeted mass spectroscopy (MS)

MEMSDuino: An Arduino-Based MEMS Switch Controller

May 1, 2025
Author(s)
Lafe Spietz, Adam Sirois, Nathan Flowers-Jacobs, Peter Hopkins, Samuel Benz, Steve Waltman
Radio frequency cryogenic switches are a critical enabling technology for quantum information science, both for calibration and high throughput testing of samples. Traditionally solenoid-based switches have been used, but transition is being made to MEMS

The Burning Characteristics of 3 m to 6 m Dry Douglas-Fir Trees

May 1, 2025
Author(s)
Erik Johnsson, Giovanni Di Cristina Torres, Eric Mueller, Matthew Bundy, Anthony Chakalis, Marco Fernandez, Anthony Hamins
A series of experiments are reported on the burning behavior of dry, 3 m to 6 m tall, Douglas fir trees. The measurements were conducted in the open under quasi-quiescent conditions. The global measurements reported include the transient, peak, and total

Atomic layer deposition of Al2O3 to Ti-6Al-4V feedstock improves oxidation resistance and tensile strength in additively manufactured parts

April 30, 2025
Author(s)
Nicholas Derimow, Joseph Gauspohl, Alec Saville, Jake Benzing, Elisabeth Mansfield, Christopher Gump, Nikolas Hrabe
With the ever-increasing research and development into additive manufacturing (AM) via laser powder bed fusion (PBF-L) of Ti-6Al-4V alloy, there has been numerous efforts to introduce different coatings onto the metal powder feedstock in order to achieve

CODATA Recommended Values of the Fundamental Physical Constants: 2022

April 30, 2025
Author(s)
Peter Mohr, David Newell, Barry N. Taylor, Eite Tiesinga
We report the 2022 self-consistent values of constants and conversion factors of physics and chemistry recommended by the Committee on Data of the International Science Council (CODATA). The recommended values can also be found at physics.nist.gov

Modular Autonomous Virtualization System for Two-Dimensional Semiconductor Quantum Dot Arrays

April 30, 2025
Author(s)
Anantha Rao, Donovan Buterakos, Barnaby van Straaten, Valentin John, Cecile Yu, Stefan Oosterhout, Lucas Stehouwer, Giordano Scappucci, Menno Veldhorst, Francesco Borsoi, Justyna Zwolak
Arrays of gate-defined semiconductor quantum dots are among the leading candidates for building scalable quantum processors. High-fidelity initialization, control, and readout of spin qubit registers require exquisite and targeted control over key

A Plan for Global Engagement on AI Standards

April 29, 2025
Author(s)
Jesse Dunietz, Mark Latonero, Kathleen Roberts
This plan has been developed by the Department of Commerce in coordination with the Department of State and agencies across the U.S. Government. It reflects more than 65 comments received in response to a December 2023 Request for Information

Multistage Networks for Glassy Holographic Photopolymers

April 29, 2025
Author(s)
Alexander Osterbaan, Andrew Sias, Marianela Trujillo-Lemon, Kieran Fung, Jason Killgore, ROBERT MCLEOD, Christopher Bowman
In the writing of holographic photopolymers, the addition of a third stage cure to the typical polyurethane matrix and acrylate writing monomer steps is used here to modify the ultimate thermomechanical properties of the final holographic photopolymer

Application of neutron grating interferometry and tomography to study ancient Korean copper-based coins

April 28, 2025
Author(s)
Youngju Kim, Michael Daugherty, Caitlyn Wolf, Daniel Hussey, Jacob LaManna, David Jacobson, Paul A. Kienzle, Daeseung Kim, Seung Wook Lee, Minsoo Han, Hahn Choo, Jongyul Kim, Taejoo Kim
Distinguishing differences between authentic artifacts and replicas is a significant challenge in the field of cultural heritage. In this study, we explore the application of neutron grating interferometry and tomography techniques to identify ancient

Cannabis Laboratory Quality Assurance Program: Exercise 3 Moisture Final Report

April 28, 2025
Author(s)
Andrea Yarberry, Charles Barber, Laura Wood, Walter Wilson
NIST launched a Cannabis Laboratory Quality Assurance Program (CannaQAP) in 2020 to assist laboratories in demonstrating and improving cannabis (hemp and marijuana) measurement comparability and competence. CannaQAP provided tools that allowed analysts and
Displaying 1 - 25 of 143596