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Search Publications

NIST Authors in Bold

Displaying 8076 - 8100 of 73927

Stable Postfullerene Solar Cells via Direct C-H Arylation Polymerization. Morphology-Performance Relationships

May 16, 2019
Author(s)
Subhrangsu Mukherjee, Thomas Aldrich, Weigang Zhu, Lee J. Richter, Eliot Gann, Dean DeLongchamp, Antonio Facchetti, Ferdinand Melkonyan, Tobin Marks
The scope of the environmentally benign direct C-H arylation polymerization (DARP) process is validated and significantly extended in the synthesis of a high-performance benzodithiophene- based copolymer series, PBDT(Ar)-FTTE, with previously untested and

Structured Illumination Mueller Matrix Imaging

May 16, 2019
Author(s)
Joseph P. Angelo, Thomas Germer, Maritoni Litorja
We perform Mueller matrix imaging (MMI) of diffusely scattering phantoms under sinusoidal irradiance of varying spatial frequency. Quantitative polarimetric sensing via MMI completely characterizes a sample's polarimetric properties, while structured

Electromagnetically induced transparency in inhomogeneously broadened solid media

May 15, 2019
Author(s)
Kumel H. Kagalwala, Fan Haoquan, Sergey Polyakov, Alan L. Migdall, Elizabeth A. Goldschmidt
We study, theoretically and experimentally, electromagnetically induced transparency (EIT) in two di erent solid-state systems. Unlike many implementations in homogeneously broadened media, these systems exhibit inhomogeneous broadening of their optical

Incommensurate Magnetism near Quantum Criticality in CeNiAsO

May 15, 2019
Author(s)
Shan Wu, W. A. Phelan, L. Liu, J. R. Morey, J. A. Tutmaher, J. C. Neuefeind, Ashfia Huq, Matthew B. Stone, M. Feygenson, David W. Tam, Benjamin A. Frandsen, Benjamin Trump, Cheng Wan, S. R. Dunsiger, Tyrel M. McQueen, Y. J. Uemura, Collin L. Broholm

On the Importance of Firebrand Processes in Large Outdoor Fires

May 15, 2019
Author(s)
Samuel L. Manzello
Firebrands are produced from combustion of both vegetative and structural fuels in large outdoor fires. It is well known that firebrand generation, transport, and ignition mechanisms result in rapid and potentially devastating fire spread processes in

Post-Quantum Cryptography and 5G Security: Tutorial

May 15, 2019
Author(s)
T. Charles Clancy, Robert W. McGwier, Lidong Chen
The Fifth Generation (5G) mobile broadband standards make a fundamental shift in cryptography. Prior generations based their security and privacy principally on symmetric key cryptography. The Subscriber Identity Module (SIM) and its successors contain a

Practical Guides for X-Ray Photoelectron Spectroscopy: First Steps in Planning, Conducting, and Reporting XPS Measurements

May 15, 2019
Author(s)
Cedric J. Powell, Donald R. Baer, Kateryna Artyushkova, Christopher R. Brundle, James E. Castle, Mark Engelhard, Karen Gaskell, John Grant, Richard Haasch, Matthew Linford, Peter Sherwood, Vincent Smentkowski, Alexander Shard
Over the past three decades, the use of x-ray photoelectron spectroscopy (XPS) in research and applications has grown to make XPS the most popular method of surface analysis. There has also been an increase in the number of new or inexperienced users along

Voices of First Responders – Examining Public Safety Communication Problems and Requested Functionality: Findings from User-Centered Interviews, Phase 1, Volume 2.1

May 15, 2019
Author(s)
Shanee T. Dawkins, Yee-Yin Choong, Mary F. Theofanos, Kristen Greene, Susanne M. Furman, Michelle P. Steves, Sandra S. Prettyman
The public safety community has a unique opportunity to improve communication technology for incident response with the creation of the national public safety broadband network (NPSBN). Understanding the problems currently being experienced by first

Identification of machine tool squareness errors via inertial measurements

May 14, 2019
Author(s)
Karoly Szipka, Andreas Archenti, Gregory W. Vogl, Alkan Donmez
The accuracy of multi-axis machine tools is affected to a large extent by the behaviour of the system's axes and their error sources. In this paper, a novel methodology using circular inertial measurements quantifies changes in squareness between two axes

NISTIR 7383, Selected Procedures for Volumetric Calibrations (2019 Ed)

May 14, 2019
Author(s)
Georgia L. Harris, Val R. Miller
This publication contains Good Measurement Procedures (GMP), Good Laboratory Procedures (GLP), and Standard Operating Procedures (SOP) for use in calibration laboratories performing volumetric calibrations. It includes procedures for Volume Transfer and

Uncertainty of particle size measurements using dynamic image analysis

May 14, 2019
Author(s)

Justin G. Whiting, Vipin N. Tondare, John H. Scott, Thien Q. Phan, M A. Donmez

Metal powder particle size and size distribution (PSD) are critical factors affecting powder layer density and uniformity in additive manufacturing processes. Among various existing measurement methods, dynamic image analysis (DIA) instruments are very

A Testbed for Quantum Communication and Quantum Networks

May 13, 2019
Author(s)
Lijun Ma, Abdella Battou, Xiao Tang, Oliver T. Slattery
The development of Quantum Networks is underway with significant acceleration in in recent years. Meanwhile. quantum scale devices and components such as single photon sources, detectors, memories and interfaces are ever readier to leave the laboratory

BABAR: Black Array of Broadband Absolute Radiometers for far infrared sensing

May 13, 2019
Author(s)
Christopher S. Yung, Nathan A. Tomlin, Cameron Straatsma, Joel Rutkowski, Erik Richard, Dave Harber, John H. Lehman, Michelle S. Stephens
Currently at NIST, there is an effort to develop a black array of broadband absolute radiometers (BABAR) for far infrared sensing. The linear array of radiometer elements is based on uncooled vanadium oxide (VOx) microbolometer pixel technology but with

Co 25 Fe 75 Thin Films with Ultralow Total Damping

May 13, 2019
Author(s)
Eric R. Edwards, Hans T. Nembach, Justin M. Shaw
We measure the dynamic properties of Co 25 Fe 75 thin films grown by dc magnetron sputtering. Using ferromagnetic resonance spectroscopy, we demonstrate an ultralow total damping parameter in the out-of-plane configuration of

Comparison of Models for Heat Transfer in High-Density Fibrous Insulation

May 13, 2019
Author(s)
Sergio A. Carvajal, Edward Garboczi, Robert R. Zarr
This paper evaluates different models for calculating the effective thermal conductivity of fibrous insulation by comparing predicted values with certified values of Standard Reference Material 1450c, Fibrous Glass Board. The fiber diameter distribution

Design and performance study of actively holding-off GHz-gated InGaAs/InP SPADs

May 13, 2019
Author(s)
Alessandro Restelli, Joshua C. Bienfang, Alan L. Migdall
High-speed periodic gating of InGaAs/InP single-photon avalanche diodes (SPADs) has allowed these detectors to operate at count rates above $10^8$ per second with low-afterpulsing. However, a drawback of high-speed periodic gating is that bias gates are

Designing new structures in epitaxial graphene on SiC: transport and quantum effects

May 13, 2019
Author(s)
Randolph E. Elmquist, Hanbyul Jin, Mattias Kruskopf, Martina Marzano, Dinesh K. Patel, Alireza R. Panna, Albert F. Rigosi
When epitaxial graphene (EG) grows on hexagonal SiC(0001), chemical doping is produced by bonds at the epitaxial interface, or buffer layer. Robust quantum Hall effect (QHE) plateaus are observed at RK/2 = h/2e2, where RK is a constant of electrical

High-resolution, high-contrast mid-infrared imaging of fresh biological samples with ultraviolet-localized photoacoustic microscopy

May 13, 2019
Author(s)
Junhui Shi, Terrence Wong, Yun He, Lei Li, Ruiying Zhang, Christopher Yung, Jeeseong C. Hwang, Lihong Wang
Mid-infrared (MIR) microscopy provides rich chemical and structural information about biological samples, without staining. Conventionally, the long MIR wavelength severely limits the lateral resolution owing to optical diffraction; moreover, the strong

High-Pressure Synthesis of Non-Stoichiometric Li x WO 3 (0.5less than or equal to}xless than or equal to}1.0) with LiNbO 3 Structure

May 12, 2019
Author(s)
Kohdai Ishida, Yuya Ikeuchi, Cedric Tassel, Hiroshi Takatsu, Craig Brown, Hiroshi Kageyama
Compounds with the LiNbO 3-type structure are important for a variety of applications such as piezoelectric sensors, while recent attention has been paid to magnetic and electronic properties. However, all the materials reported are stoichiometric. This
Displaying 8076 - 8100 of 73927