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Search Publications

NIST Authors in Bold

Displaying 226 - 250 of 73697

Residual stress-assisted static globularization in electron beam powder bed fusion Ti-6Al-4V from powder recovery and hot isostatic pressing

June 10, 2025
Author(s)
Nicholas Derimow, Thomas Berfield, Keenan Hanson, Jake Benzing, Nikolas Hrabe
The residual stresses from controlled powder recovery blasting on electron beam powder bed fusion (PBF-EB) Ti-6Al-4V were investigated via hole drilling, profilometry, and microscopy. After hot isostatic pressing, the near-surface lamellar the near-surface

Spin-lattice entanglement in CoPS3

June 10, 2025
Author(s)
Angela Hight Walker, Kevin Garrity, Rebecca Dally
Complex chalcogenides in the MPS3 family of materials (M = Mn, Fe, Co, and Ni) display remarkably different phase progressions depending upon the metal center orbital filling, character of the P–P linkage, and size of the van der Waals gap. There is also a

Uranium Particle Age Dating, Aggregation, and Model Age Best Estimators

June 9, 2025
Author(s)
Evan Groopman, Todd Williamson, Timothy Pope, Michael Bronikowski, Spencer M. Scott, Matthew Wellons
We present important aspects of uranium particle age dating by Large-Geometry Secondary Ion Mass Spectrometry (LG-SIMS) that can introduce bias and increase model age uncertainties, especially for small, young, and/or low-enriched particles. This metrology

Examining Generalizability of AI Models for Catalysis

June 7, 2025
Author(s)
Kamal Choudhary, Shih Han Wang, Hongliang Xin, Luke Achenie
In this work, we investigate the generalizability of problem-specific machine-learning models for catalysis across different datasets and adsorbates, and examine the potential of unified models as pre-screening tools for density functional theory

An Autonomous Agent for Soft Material Structural Optimization and Discovery

June 6, 2025
Author(s)
Tyler Martin, Austin McDannald, Aaron Kusne, Peter Beaucage
The pace of formulation (re)development and design is rapidly increasing as both consumers and new legislation demand products that do less harm to the environment while maintaining high standards of performance. To meet this need, we have developed an

Dual-Field Multicollector LG-SIMS Analysis of Mixed U-Pu Reference Particles

June 6, 2025
Author(s)
Evan Groopman, Todd Williamson, Kyle Samperton, Spencer M. Scott, Bryan Foley, Michael Bronikowski, George King, Matthew Wellons
In this study, we demonstrate a new dual-field multicollector protocol for magnetic sector large-geometry secondary ion mass spectrometry that enables concurrent analysis of U and Pu isotopes. We apply this analysis protocol to recently produced mixed U-Pu

Out-of-plane electrochemical transport in all-thin-film hetero-epitaxial solid oxide fuel cell structures

June 6, 2025
Author(s)
Huairuo Zhang, Albert Davydov, Yangang Liang, Xiaohang Zhang, Yaoyu Ren, Seunghun Lee, H.M. Jaim, Eric Marksz, Takeuchi Ichiro, Haiyan Tan, Leonid Bendersky, Chris Kucharczyk, Ruiyun Huang, Sossina Haile
We have fabricated all-thin-film solid oxide fuel cell (SOFC) heterostructures and investigated the transport properties of Sm0.2Ce0.8O2-δ (SDC20) in an out-of-plane measurement geometry. The SOFC heterostructures, consisting of a bottom SrRuO3 (SRO) or

Implications of the Bullet Black Box Study

June 5, 2025
Author(s)
Bullet Black Box Working Group
The Bullet Black Box Working Group (BulletBB-WG) was convened to review the results of the NIST-Noblis Bullet Black Box Study, and assess the implications of that study on casework. This report includes the recommendations of the BulletBB-WG on how to

Metrics and Methodology for Hardware Security Constructs

June 5, 2025
Author(s)
Sanjay Rekhi, Kostas Amberiadis, Abir Ahsan Akib, Ankur Srivastava
Although hardware is commonly believed to be security-resilient, it is often susceptible to vulnerabilities arising from design and implementation flaws. These flaws have the potential to jeopardize not only the hardware's security, but also its operations

Anomalous Hall Effect Emerging from Field-Induced Weyl Nodes in SmAlSi

June 4, 2025
Author(s)
Yuxiang Gao, Shiming Lei, Eleanor Clememts, Yichen Zhang, Xue-Jian Gao, Songxue Chi, Kam Law, Ming Yi, Jeffrey Lynn, Emilia Morosan
The intrinsic anomalous Hall effect (AHE) has been reported in numerous ferromagnetic Weyl semimetals. However, the AHE in the antiferromagnetic (AFM) or paramagnetic (PM) state of Weyl semimetals has rarely been observed experimentally. Different

Picosecond Josephson samplers: Modeling and measurements

June 4, 2025
Author(s)
Logan Howe, Bart van Zeghbroeck, David Olaya, John Biesecker, Charles Burroughs, Peter Hopkins, Samuel Benz
Measurement of signals generated by superconducting Josephson junction (JJ) circuits require ultra-fast components located in close proximity to the generating circuitry. We report a detailed study of optimal design criteria for a JJ-based sampler that

Accurate keyhole instability prediction in metal additive manufacturing through machine learning-aided numerical simulation

June 3, 2025
Author(s)
Jiahui Zhang, Runbo Jiang, Kangming Li, Pengyu Chen, Xiao Shang, Zhiying Liu, Brian Simonds, Qianglong Wei, Hongze Wang, Jason Hattrick-Simpers, Tao Sun, Anthony Rollet, Yu Zou
A primary obstacle impeding the use of metal additive manufacturing technologies in fatigue-sensitive applications is the presence of porosity, primarily caused by keyhole instability. To tackle this challenge, it is imperative to accurately forecast

Artificial Intelligence in the Fire Service: Considerations for Implementing Artificial Intelligence into Electronic Safety Equipment

June 3, 2025
Author(s)
Christopher Sampl, Clinton Smith, Albert Bahri, David Little, Richard Reel, Ash Liu, Jonathan Hodges, Ryan Falkenstein-Smith
Artificial Intelligence (AI) is becoming more pervasive in society, including public safety. There is a growing need for safety guidelines as AI becomes more integrated within electronic safety products used within the fire service. A group comprised of

Deciphering decomposition pathways of high explosives with cryogenic X-ray Raman spectroscopy

June 3, 2025
Author(s)
Oscar Parades Mellone, Michael Nielsen, Jeffrey Babicz, John Vinson, Trevor Willey, Dimosthenis Sokaras
We employed cryogenic X-ray Raman spectroscopy to investigate the early-stage decomposition of the high explosive molecule hexanitrohexaazaisowurtzitane (CL-20). By systematically varying the radiation dose under cryogenic conditions, we induced the

Strain-programmable van der Waals magnetic tunnel junctions

June 3, 2025
Author(s)
John Cenker, Dmitry Ovchinnikov, Harvey Yang, Daniel Chica, Catherine Zhu, Jiaqi Cai, Geoffrey Diederich, Zhaoyu Liu (liuzhaoyu), Xiaoyang Zhu, Xavier Roy, Ting Cao, Matthew Daniels, Jiun-Haw Chu, Di Xiao, Xiaodong Xu
Magnetic tunnel junctions (MTJs) are foundational spintronics devices with applications ranging from stable magnetic memory to emerging stochastic computing schemes. Integrating van der Waals magnets into these devices could enable the realization of

Phonon lifetimes and mode softening in cubic Cs2AgBiBr6

June 2, 2025
Author(s)
Zihan Zhang, Peter Gehring, Adam H. Slavney, Julian A. Vigil, Tao Hong, Jose Rodriguez Rivera, Johan Klarbring, Hemamala Karunadasa, Michael Toney, Nicholas Weadock
Metal halide perovskites (MHPs) have emerged as noteworthy candidates for photovoltaic applications in recent years. Their high power-conversion efficiency is largely attributed to the structure-function relationship, which is not well understood. In this

Imaging of induced surface charge distribution effects in glass vapor cells used for Rydberg atom-based sensors

June 1, 2025
Author(s)
Charles Patrick, Noah Schlossberger, Daniel Hammerland, Nikunjkumar Prajapati, Tate McDonald, Samuel Berweger, Rajavardhan Talashila, Alexandra Artusio-Glimpse, Christopher Holloway
We demonstrate the imaging of localized surface electric (E) field effects on the atomic spectrum in a vapor cell used in Rydberg atom-based sensors. These surface E-fields can result from an induced electric charge distribution on the surface. Induced

SEC-SAXS/MC Ensemble Structural Studies of the Microtubule Binding Protein Cdt1 Show Monomeric, Folded-Over Conformations

June 1, 2025
Author(s)
Kyle Smith, Srinivas Chakravarthy, Manas Chakraborty, Kristen M. Vosberg, Marco Tonelli, Maximilian G. Plach, Arabela A. Grigorescu, Joseph E. Curtis, Dileep Varma
Cdt1 is a mixed folded protein critical for DNA replication licensing and it also has a "moonlighting" role at the kinetochore via direct binding to microtubules and the Ndc80 complex. However, it is unknown how the structure and conformations of Cdt1

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
Displaying 226 - 250 of 73697
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