Amount of substance

News and Updates

Identifying Individual Molecules: NIST Study Suggests How to Build a Better ‘Nanopore’ Biosensor

April 27, 2021

Researchers have spent more than three decades developing and studying miniature biosensors that can identify single molecules. In five to 10 years, when such

After 90 Years, a Better Way to Measure the Composition of Paper

February 14, 2019

Researchers at the National Institute of Standards and Technology (NIST), in collaboration with the U.S. Government Publishing Office (GPO), have developed a

NIST researcher Jodie Pope with the big blue ball

Better Flowmeters with the Big Blue Ball

February 24, 2017

Last year, upwards of 25 trillion cubic feet of natural gas were delivered to customers in the United States, and when it changed hands, nearly every cubic foot

Projects and Programs

NIST PS1 Primary Standard for quantitative NMR (Benzoic Acid)

The "first-of-its-kind" in an entirely new class of reference material, NIST PS1 Primary Standard for quantitative NMR (Benzoic Acid) is now available! The PS

Surface Desorption Ambient Mass Spectrometry

Surface desorption ambient mass spectrometry enables direct solid surface interrogation for sampling and ionization of trace analytes. This project encompasses

Magnetic Sector Secondary Ion Mass Spectrometry

Magnetic sector secondary ion mass spectrometry (SIMS) generates isotopic and elemental information from solid surfaces with depth profiling capabilities to

Standards for Metagenomics

Metagenomics, or identifying the organisms present in a sample through DNA-based analysis, is a revolutionary technology made possible through advances in

Publications

Thickness measurement of nm HfO2 films

August 11, 2021

Author(s)

K.J. Kim, A Kim, S.C. Kim, S.W. Song, H. Ruh, W.E.S. Unger, J. Radnik, J. Mata-Salazar, J.M. Juarez-Garcia, O. Cortazar-Martinez, A. Herrera-Gomez, P.E. Hansen, J.S. Madsen, C.A. Senna, B.S. Archanjo, J.C. Damasceno, C.A. Achete, H. Wang, M. Wang, Donald Windover, Eric B. Steel, A. Kurokawa, T. Fujimoto, Y. Azuma, S. Terauchi, L. Zhang, W.A. Jordaan, S.J. Spencer, A.G. Shard, L. Koenders, M. Krumrey, I. Busch, C. Jeynes

A pilot study for the thickness measurement of HfO2 films was performed by the Surface Analysis Working Group (SAWG) of the Consultative Committee for Amount of

Atom probe tomography

July 22, 2021

Author(s)

Ann Chiaramonti Debay, Baptiste Gault, Julie Cairney, Michael P. Moody, Oana Cojocaru-Miredin, Patrick Stender, Renelle Dubosq, Christoph Freysoldt, Surendra Kumar Makineni, Tong Li

Atom probe tomography (APT) provides three-dimensional compositional mapping with sub-nanometre resolution. The sensitivity of APT is in the range of parts per

Decision Tree for Key Comparisons

April 27, 2021

Author(s)

Antonio Possolo, Amanda Koepke, David Newton, Michael R. Winchester

This contribution describes a Decision Tree intended to guide the selection of statistical models and data reduction procedures in key comparisons (KCs). The

A new highly enriched 233U reference material for improved simultaneous determination of uranium amount and isotope amount ratios in trace level samples

January 26, 2021

Author(s)

Richard Essex, Ross W. Williams, Kayron T. Rogers, Cole R. Hexel, Tashi Parsons-Davis, Kerri C. Treinen

A highly-enriched 233U reference material (>0.99987 n(233U)/n(U)) has been prepared and characterized for use as an isotope dilution mass spectrometry spike. An

Tools and Instruments

Local Electrode Atom Probe Tomography (LEAP)

Field evaporates (with a voltage and laser pulse) a sharp tip-shaped specimen. Collects the ionization products in a position-sensitive, time-of-flight mass

Material Analysis Using Neutron Depth Profiling

Light elements such as helium, lithium, boron, and nitrogen are essential constituents in materials that enable energy technologies; lithium ion batteries