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 8176 - 8200 of 74070

The role of Si in GaN/AlN/Si(111) PAMBE Epitaxy: Polarity and Inversion

May 22, 2019
Author(s)
Alexana Roshko, Matthew D. Brubaker, Paul T. Blanchard, Todd E. Harvey, Kristine A. Bertness
The microstructure, polarity and Si distribution in AlN/GaN layers grown by PAMBE on Si(111) was assessed by STEM. Samples grown under both metal- and nitrogen-rich conditions contained defects at the AlN/Si interface which suggest formation of an Al-Si

Development and Interlaboratory Evaluation of a NIST Reference Material RM 8366 for EGFR and MET Gene Copy Number Measurements

May 21, 2019
Author(s)
Hua-Jun He, Biswajit Das, Megan H. Cleveland, Chen Li, Corinne Camalier, Liang-Chu Liu, Kara L. Norman, Andrew Fellowes, Christopher McEvoy, Steven P. Lund, Jamie L. Almeida, Carolyn R. Steffen, Chris Karlovich, P. M. Williams, Kenneth D. Cole
The National Institute Standard and Technology (NIST) Reference Material RM 8366 was developed to improve the quality of gene copy measurements of EGFR (epidermal growth factor receptor) and MET (proto-oncogene, receptor tyrosine kinase), important targets

Health Assessment Measurements Quality Assurance Program: Exercise 2 Final Report

May 21, 2019
Author(s)
Charles A. Barber, Jeanice M. Brown Thomas, Carolyn Q. Burdette, Johanna Camara, Stephen E. Long, Melissa M. Phillips, Benjamin J. Place, Catherine A. Rimmer, Laura J. Wood, Lee L. Yu
The NIST Health Assessment Measurements Quality Assurance Program (HAMQAP) was launched in collaboration with the National Institutes of Health (NIH) Office of Dietary Supplements (ODS) in 2017. HAMQAP was established to enable laboratories to improve the

Long-term drift of Si-MOS quantum dots with intentional donor implants

May 21, 2019
Author(s)
m rudolph, B Sarabi, Roy E. Murray, M Carroll, Neil M. Zimmerman
Charge noise can be detrimental to the operation of quantum dot (QD) based semiconductor qubits. We study the low-frequency charge noise by charge o set drift measurements for Si-MOS devices with intentionally implanted donors near the QDs. We show that

Nanoscale Particle Motion Reveals Polymer Mobility Gradient in Nanocomposites

May 21, 2019
Author(s)
Erkan Senses, Suresh Narayanan, Antonio Faraone
Polymer mobility near nanoparticle surfaces has been extensively discussed, however, direct experimental observation in the nanocomposite melts has been a difficult task. Here, by taking advantage of large dynamical asymmetry between miscible matrix and

Architecture for the photonic integration of an optical atomic clock

May 20, 2019
Author(s)
Zachary L. Newman, Vincent N. Maurice, Tara E. Drake, Jordan R. Stone, Travis Briles, Daryl T. Spencer II, Connor D. Fredrick, Qing Li, Daron A. Westly, Bojan R. Ilic, B. Shen, M.-G Suh, K. Y. Yang, C Johnson, D.M. S. Johnson, Leo Hollberg, K. Vahala, Kartik A. Srinivasan, Scott A. Diddams, John E. Kitching, Scott B. Papp, Matthew T. Hummon
Optical atomic clocks, which rely on high-frequency, narrow-line optical transitions to stabilize a clock laser, outperform their microwave counterparts by several orders of magnitude due to their inherently large quality factors. Optical clocks based on

Cybersecurity Framework Manufacturing Profile

May 20, 2019
Author(s)
Keith A. Stouffer, Timothy A. Zimmerman, CheeYee Tang, Joshua Lubell, Jeffrey A. Cichonski, John McCarthy
This document provides the Cybersecurity Framework (CSF) implementation details developed for the manufacturing environment. The "Manufacturing Profile" of the Cybersecurity Framework can be used as a roadmap for reducing cybersecurity risk for

FIPS 140-3 Adopts ISO/IEC Standards

May 20, 2019
Author(s)
Kim B. Schaffer
This bulletin summarizes the information found in FIPS 140-3: Security Requirements for Cryptographic Modules which is applicable to all federal agencies that use cryptographic-based security systems to provide adequate information security for all agency

Quantum Frequency Conversion of a Quantum Dot Single-Photon Source on a Nanophotonic Chip

May 20, 2019
Author(s)
Anshuman Singh, Qing Li, Shunfa Liu, Ying Yu, Xiyuan Lu, Christian Schneider, Sven Hofling, John Lawall, Varun Verma, Richard Mirin, Sae Woo Nam, Jin Liu, Kartik Srinivasan
Single self-assembled InAs/GaAs quantum dots are promising bright sources of indistinguishable photons for quantum information science. However, their distribution in emission wavelength, due to inhomogeneous broadening inherent to their growth, has

Uncertainty in global downwelling plane irradiance estimates from sintered polytetra fluoroethylene plaque radiance measurements

May 20, 2019
Author(s)
Alexandre Castagna, B. Carol Johnson, Kenneth Voss, Heidi M. Dierssen, Heather Patrick, Thomas Germer, Zhehai Shang
Global downwelling plane irradiance is a necessary variable to normalize the water-leaving radiance measurements, reducing the magnitude and spectral variabilities introduced by the incident light field. As a result, the normalized measurements, known as

Mechanisms of spontaneous chain formation and subsequent microstructural evolution in shear- driven strongly confined drop monolayers

May 18, 2019
Author(s)
Sagnik Singha, Abhilash R. Malipeddi, Mauricio Zurita-Gotor, Kausik Sarkar, Kevin Shen, Michael Loewenberg, Kalman D. Migler, Jerzy Blawzdziewicz
It was experimentally demonstrated by Migler and his collaborators [Phys. Rev. Lett. 2001, 86, 1023; Langmuir 2003, 19, 8667] that a strongly confined drop monolayer sheared between two parallel plates can spontaneously develop a flow-oriented drop-chain

A Review of Organotin Contamination in Arctic and Subarctic Regions

May 17, 2019
Author(s)
John Kucklick, MIchael Ellisor
Organotin (OT) compounds are of continued arctic concern as they still widely used despite the most well-studied OT, tributyl tin (TBT), being restricted for use on marine vessels to prevent fouling by marine organisms. The highest OT concentrations found

Measuring Ion-Pairing and Hydration in Variable Charge Supramolecular Cages with Microwave Microfluidics

May 17, 2019
Author(s)
Angela C. Stelson, Cynthia M. Hong, Mitchell C. Groenenboom, Charles A. Little, James C. Booth, Nathan D. Orloff, Robert G. Bergman, Kenneth N. Raymond, Kathleen A. Schwarz, F. D. Toste, Christian J. Long
MetaMetal–organic supramolecular cages can act as charged molecular containers that mediate reactions, mimic enzymatic catalysis, and selectively sequester chemicals.1,2 The hydration of these cages in solution plays a crucial role in their interactions
Displaying 8176 - 8200 of 74070