NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

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 7001 - 7025 of 73697

Homogenization of Concrete Microstructures in Nuclear Power Plants

December 31, 2020
Author(s)
Christa Torrence, Aishwarya Baranikumar, Zachary Grasley, Edward Garboczi
Nearly all nuclear power plants in the United States are operating past their intended lifetimes or are requesting lifetime extensions, therefore understanding changes to the concrete containment structure over time is crucial to evaluate the structure's

Identifying risk factors for levels of perfluoroalkyl substances in the placenta in a high-risk pregnancy cohort in North Carolina

December 31, 2020
Author(s)
Jacqueline T. Bangma, Lauren A. Eaves, Kirsi Oldenburg, Jessica L. Reiner, Tracy Manuck, Rebecca C. Fry
Prenatal exposure to perfluoroalkyl substances (PFAS), a ubiquitous class of chemicals, is associated with adverse outcomes such as preeclampsia, low infant birth weight and later-life adiposity. The objectives of this study were to examine PFAS levels in

Microstructure Homogenization of Concrete Used in Nuclear Power Plants

December 31, 2020
Author(s)
Edward Garboczi, Christa Torrence, Zachary Grasley, Aishwarya Baranikumar, William Lawrimore
Nearly all nuclear power plants in the United States are operating past their intended lifetimes or are requesting lifetime extensions. Therefore, understanding changes to the concrete containment structure over time is crucial to evaluate the structure's

Ra-224 activity, half-life, and 241 keV gamma ray absolute emission intensity: a NIST-NPL bilateral comparison

December 31, 2020
Author(s)
Denis E. Bergeron, Sean Collins, Leticia Pibida, Jeffrey T. Cessna, Ryan P. Fitzgerald, Brian E. Zimmerman, Peter Ivanov, John Keightley, Elisa Napoli
The national metrology institutes for the United Kingdom and the United States have compared activity standards for 224Ra, an -particle emitter of interest as the basis for therapeutic radiopharmaceuticals. Solutions of 224RaCl2 were assayed by absolute

Relationship between the Pacific Decadal Oscillation (PDO) and persistent organic pollutants in sympatric Alaskan seabird (Uria aalge and U. lomvia) eggs between 1999 and 2010

December 31, 2020
Author(s)
Vrinda Kalia, Stacy Schuur, Keith A. Hobson, Howard H. Chang, Lance A. Waller, Steven Hare, Matthew O. Gribble
Although climate change occurs alongside other anthropogenic ecosystem impacts, little is known about how sea-surface temperature variability influences the ecotoxicology of persistent organic pollutants (POPs). We analyzed POP contaminant levels, and

Ruddlesden-Popper-Phase Hybrid Halide Perovskite/Small-Molecule Organic Blend Memory Transistors

December 31, 2020
Author(s)
Murali Gedda, Emre Yengel, Hendrik Faber, Fabian Paulus, Joshua Kreb, Ming Chun Tang, Siyuan Zhang, Christina A. Hacker, Prashant Kumar, Dipti R. Naphade, Yana Vaynzof, George Volonakis, Feliciano Giustino, Thomas D. Anthopoulos
Controlling the morphology of metal halide perovskite layers during processing is critical for the reliable manufacturing of optoelectronic devices. Here we report on a strategy to control the microstructure of solution-processed layered Ruddlesden-Popper

The interactive effect of heat and mass transport on water condensation in the gas diffusion layer of a proton exchange membrane fuel cell

December 31, 2020
Author(s)
Po-Ya A. Chuang, Md A. Rahman, Felipe Mojica, Daniel S. Hussey, David L. Jacobson, Jacob LaManna
Despite recent advancement in fuel cell technology, significant challenges remain in achieving high power density operation to meet the stringent targets of performance, durability and cost. This is due to the lack of fundamental understanding in

A system for probing Casimir energy corrections to the condensation energy

December 28, 2020
Author(s)
Diego J. Perez, Alexander Stange, Richard Lally, Lawrence Barrett, Matthias Imboden, Abhishek Som, David Campbell, Vladimir Aksyuk, David Bishop
In this article, we present a nano-electromechanical system (NEMS) designed to detect changes in the Casimir Energy. The Casimir effect is a result of the appearance of quantum fluctuations in the electromagnetic vacuum. Previous experiments have used nano

A technique to measure spin-dependent trapping events at the metal-oxide-semiconductor field-effect transistor interface: Near zero field spin-dependent charge pumping

December 28, 2020
Author(s)
Mark A. Anders, Patrick M. Lenahan, Nicholas J. Harmon, Michael E. Flatte
We discuss a new technique to measure spin dependent trapping events at the MOSFET interface named near zero field spin dependent charge pumping (NZF SDCP) which is based on the powerful MOSFET interface trap characterization measurement called charge

Developing Single Layer MOS Quantum Dots for Diagnostic Qubits

December 28, 2020
Author(s)
Yanxue Hong, Aruna Ramanayaka, Ryan Stein, Joshua M. Pomeroy
The design, fabrication and characterization of single metal gate layer, metal-oxide- semiconductor (MOS) quantum dot devices robust against dielectric breakdown are presented as prototypes for future diagnostic qubits. These devices were developed as a

Workshop Report: Test Methods and Metrics for Effective HRI in Collaborative Human-Robot Teams, ACM/IEEE Human-Robot Interaction Conference, 2019

December 28, 2020
Author(s)
Shelly Bagchi, Murat Aksu, Megan L. Zimmerman, Jeremy Marvel, Brian Antonishek
Verified and validated test methods, being necessary to measure the performance of complex systems, are important tools for driving innovation, benchmarking and improving performance, and establishing trust in collaborative human-robot teams. This full-day

CCQM-K143 Comparison of Copper Calibration Solutions Prepared by NMIs/DIs

December 24, 2020
Author(s)
John Molloy, Michael Winchester, Therese Butler, Olaf Rienitz, Volker Goerlitz, Anita Roethke, Volker Goerlitz, Rodrigo Caciano de Sena, Lu Yang, Kenny Nadeau, Patricia R. Arancibia, Wu Bing, Zhou Tao, James Snell, Jochen Vogl, Maren Koenig, R. K. Kotnala, S. Swarupa Tripathy, Christine Elishian, Rosi Ketrin, Toshihiro Suzuki, Tom Oduor Okumu, Yong-Hyeon Yim, Judith Velina Lara Manzano, Mirella Buzoianu, Alena Sobina, Veniamin Zyskin, Egor Sobina, Pavel Migal, Mare Linsky, Suleyman Z. Can, Betul Ari, Heidi Goenaga Infante
CCQM-K143 is a key comparison that assesses participants' ability to prepare single element calibration solutions. Preparing calibration solutions properly is the cornerstone of establishing a traceability link to the International System of Units (SI)

Kitaev Interactions in the Co Honeycomb Antiferromagnets Na 3 Co 2 SbO 6 and Na 2 Co 2 TeO 6

December 24, 2020
Author(s)
M. Songvilay, J. Robert, Jose Rodriguez Rivera, William D. Ratcliff, F. Damay, V. Baledent, M. Jimenez-Ruiz, P. Lejay, E. Pachoud, A. Hadj-Azzem, V. Simonet, C. Stock
Co 2+ ions in an octahedral crystal field, stabilize a jeff = 1⁄2 ground state with an orbital degree of freedom and and have been recently put forward for realising Kitaev interactions, a prediction that we have tested by investigating spin dynamics in

Microscale Photopatterning of Through-thickness Modulus in a Monolithic and Functionally Graded 3D Printed Part

December 24, 2020
Author(s)
Asais C. Uzcategui, Callie I. Higgins, John Hergert, Andrew Tomaschke, Victor Crespo-Cuevas, Virginia L. Ferguson, Stephanie Bryant, Robert R. McLeod, Jason Killgore
3D printing is transforming traditional processing methods in applications ranging from tissue engineering to optics. To fulfill its maximum potential, 3D printing requires a robust technique for producing structures with precise three-dimensional (x, y

Independent Amplitude Control of Arbitrary Orthogonal States of Polarization via Dielectric Metasurfaces

December 23, 2020
Author(s)
Qingbin Fan, Mingze Liu, Cheng Zhang, Wenqi Zhu, Yilin Wang, Peicheng Lin, Feng Yan, Lu Chen, Henri Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
Exquisite polarization control using optical metasurfaces has attracted considerable attention thanks to their ability to manipulate multichannel independent wavefronts with subwavelength resolution. Here we present a new class of metasurface polarization

Confinement and Processing Can Alter the Morphology and Periodicity of Bottlebrush Block Copolymers in Thin Films

December 22, 2020
Author(s)
Daniel Sunday, Moshe Dolejsi, Alice B. Chang, Lee Richter, Ruipeng Li, Paul Nealey, Robert H. Grubbs
Bottlebrush block copolymers (BBCPs) are intriguing architectural variations on linear BCPs with highly tunable structure. Confinement can have a significant impact on polymer assembly, giving rise to changes in morphology, assembly kinetics, and properties
Displaying 7001 - 7025 of 73697
Was this page helpful?