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Search Publications

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Displaying 1 - 25 of 2772

Redefining Reference Materials for the Evolving Metabolomics Landscape

September 2, 2026
Author(s)
Tracey Johnston, Fabio Casu, Ashley Russell, Hariharan Iyer, Kristine Gierz, William Davis, Amanda Bayless
The evolution of metabolomics, a field aimed at comprehensively measuring the chemical composition of a biological matrix, fundamentally reshaped the landscape of analytical measurement reliability. The 2011 release of Standard Reference Material (SRM)

Optical Measurement of Radiometric Aperture Areas

September 1, 2026
Author(s)
Ulf Griesmann
The National Institute of Standards and Technology (NIST) calibrates the areas of radiometric and photometric apertures using an optical coordinate measuring machine, which provides direct traceabililty of aperture areas to the length unit meter of the

A Reference Low-Pressure CO2 Adsorption Isotherm for Zeolite 13X: Results of an Interlaboratory Study

August 28, 2026
Author(s)
Huong Giang Nguyen, David Newton, Riaz Ahmad, Carsten Prinz, Mario Zorrilla-Valtierra, Krista Walton, Killian Gmyrek, Ronny Pini, Camille Petit, Marcus Lange, Jens Mollmer, Evelyn Fuhrmann, Katharina Volz, Garrett Taggart, Andreas Schreiber, Yuko Konishi, Kazuyuki Nakai, Christos Tampaxis, Theodore Steriotis, Hai Wang, Charles David Brewster, Mi Tian, Rajan Jagpal, Siyi Liu, George Neville, Sunanda Sain, Timothy Mays, Riccardo Rea, Enzo Mangano, Stefano Brandani, Maxwell Tsipoaka, Fateme Rezaei, Adrien Houze, Nicolas Heymans, Guy De Weireld, Charles Holland, Armin D. Ebner, James Ritter
This paper reports the results of an international interlaboratory study sponsored by the Versailles Project on Advanced Materials and Standards (VAMAS) and led by the National Institute of Standards and Technology (NIST) on the measurement of low-pressure

Methods for Estimating Fe Redox in Mesoamerican Jadeite Jade

August 5, 2026
Author(s)
Edward P. Vicenzi, Thomas Lam, Evan Jahrman, Bruce Ravel, Melinda Dyar, Jamie Weaver
Green jadeite has been selectively mined and used by Mesoamerican Indigenous cultures for centuries, with the green hues resulting from interactions among various chromophores, including Cr3+, Fe3+, and Fe2+. This study employed Fe K-edge X-ray absorption

Redox-Buffering PEAI-CeOx Passivation Suppresses Thermo-Mechanical Degradation in Perovskite Solar Cells Under Rapid Thermal Cycling

July 27, 2026
Author(s)
George Asare, Minwoo Lee, Joshua Adu, Juhong Oh, Behrang Hamadani, Jae Sung Yun, Helen Park
Perovskite solar cells (PSCs) show critical thermo-mechanical and defect mediated degradation at interfaces, limiting their deployment in terrestrial high-temperature and space-like environments. This study presents a dual-function interfacial passivation

Terrestrial laser scanners and contrast targets: Effect of algorithm, resolution, distance, and target rotational orientation on center coordinate

July 13, 2026
Author(s)
Balasubramanian Muralikrishnan, Aum Shah, Mary Gregg, Katharine Shilling, Vincent Lee, Braden Czapla
Terrestrial laser scanners (TLSs) are portable dimensional measurement instruments that produce a 3D point cloud by measuring the distance and two angles to points in the scene. Contrast targets are sometimes used to evaluate the performance of these

NIST SP 2200-08: Suitability of Cannabis Scales (2026 Ed.)

June 29, 2026
Author(s)
Jan Konijnenburg, Loren Minnich, David Sefcik, Nathanael Heckert
In the last several years, the sale and use of cannabis products have been legalized in multiple States in the U.S. With this legalization comes the legal control over the sale of cannabis products, including weights and measures regulation. State and

Literature Review of Fabricated Artifacts for X-ray Computed Tomography

June 22, 2026
Author(s)
John Wu, Felix Kim
This report provides a comprehensive literature review of fabricated artifacts, commonly referred to as phantoms, used for the performance evaluation of X-ray computed tomography (XCT) systems. As XCT is increasingly adopted for high-precision metrology in

A Switchable Longitudinal & Shear BLS Microscope for Comprehensive Modulus Imaging of Semiconductor Packaging Materials

June 17, 2026
Author(s)
Andrew Gayle, Sebastian Engmann, Ran Tao, Andrew Korovich, Polette Centellas, Yvonne Gerbig, Christopher Soles, Chris Michaels
Brillouin light scattering (BLS) offers an optical, noncontact, nondestructive method for probing the mechanical properties of next-generation semiconductor packaging materials. In this work, a switchable BLS microscope with both backscattered and off-axis

The Effect of Different Gases on Critical Flow Nozzles

May 20, 2026
Author(s)
John Wright, Christopher Crowley, Aaron Johnson, Shinichi Nakao
Critical nozzles and critical flow venturis are widely used gas flow meters because of their excellent calibration stability and well-developed flow theory. It is often desirable to calibrate them using one gas (dry air or nitrogen) and extrapolate that

Operando XPS in reactive plasmas: The importance of the wall reactions

May 15, 2026
Author(s)
John Diulus, Ashley Head, J. Anibal Boscoboinik, Andrei Kolmakov
Advancements in differential pumping and electron optics over the past few decades have enabled x-ray photoelectron spectroscopy (XPS) measurements at near-ambient pressures, bridging the pressure gap for characterizing realistic sample chemistries

Using a 4-Megapixel Hybrid Photon Counting Detector for Fast, Laboratory-Based Nanoscale X-Ray Tomography

May 12, 2026
Author(s)
Jordan Fonseca, Zachary Levine, Andras Vladar, Daniel Swetz, Felix Kim, John Henry Scott, Joseph Fowler, Nathan Ortiz, Paul Szypryt, Nathan Nakamura
Abstract Hybrid photon counting detectors (HPCDs) have unlocked new capabilities for X-ray-based measurements at synchrotrons around the world in the last 30 years. By leveraging independently optimized sensor and readout layers, they offer high quantum

Bootstrap Metric for Quantifying the Depth Resolution of 3D Sensors

April 27, 2026
Author(s)
Prem Rachakonda, Hariharan Iyer, Marek Franaszek, Kamel Saidi
Depth resolution of a 3D imaging system or 3D sensor is defined as the smallest change in physical depth that causes a detectable change in the corresponding measured or derived depth. The ability of a sensor to resolve depth on a particular target is

Redetermination of the Gravitational Constant with the BIPM torsion balance at NIST

April 16, 2026
Author(s)
Stephan Schlamminger, Leon Chao, Vincent Lee, Craig Shakarji, David Newell, Julian Stirling, Robert Cochrane, Clive Speake
We report the first replication of a high-precision measurement of the gravitational constant, $G$. The experiment employed the torsion balance originally designed and constructed at the International Bureau of Weights and Measures (BIPM) approximately

The Integration of Focused Ultrasonication, ddPCR, and Flow Cytometry Effectively Estimates Genome Copies per Cell and Enhances DNA Extraction Efficiency in Escherichia coli Samples

April 16, 2026
Author(s)
Sandra Da Silva, Nancy Lin, Kirsten Parratt, Hariharan Iyer, Guilherme Pinheiro, Holly Hack, Ian Hines, Stephanie Servetas
Microbiology researchers rely on nucleic acid measurement techniques, such as the quantitative polymerase chain reaction (qPCR) and DNA sequencing, to address diverse scientific and practical challenges. These applications range from detecting microbial

Ultra-High Speed Printing Regime in Laser Powder Bed Fusion of Highly Reflective Metals

April 5, 2026
Author(s)
Natalya Kublik, Laura Duenas Gonzalez, David Deisenroth, zhengtao gan, Bruno Azeredo
Additive manufacturing of highly reflective metals, such as copper and aluminum, often entail excessive energy losses, especially in laser powder bed fusion (LPBF). To compensate for reflected losses, high powered lasers and low scan speeds (i.e., ≤ 0.8 m

Origin of the voltage gap and recombination losses in all-perovskite tandem solar cells

March 19, 2026
Author(s)
Hurriyet Yuce Cakir, John Roller, Haoran Chen, Tingting Zhu, Susanna Thon, Yanfa Yan, Zhaoning Song, Behrang Hamadani
All-perovskite tandem solar cells with narrow and wide bandgap perovskite absorbers are promising candidates for low-cost and high efficiency photovoltaic applications. However, the open circuit voltage of typical tandem structures is generally smaller

Accurate Volume Determination for Low Gas Flow Standards

March 17, 2026
Author(s)
Jodie Pope, Christopher Crowley, Max Low, John Wright, Aaron Johnson
The National Institute of Standards and Technology (NIST) has developed the Semiconductor Low Flow Standard (SLowFlowS), a new rate-of-rise (RoR) gas flow standard capable of measuring flows as low as 0.01 standard cm³/min. SLowFlowS incorporates two
Displaying 1 - 25 of 2772
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