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Journals

Addressable graphene encapsulation of wet specimens on a chip for optical, electron, infrared and X-ray based spectromicroscopy studies

October 15, 2021

Author(s)

Andrei Kolmakov

Label-free spectromicroscopy methods offer the capability to examine complex cellular phenomena. Electron and X-ray based spectromicroscopy methods, though...

Organic single crystals of charge-transfer complexes: model systems for the study of donor/acceptor interactions

October 15, 2021

Author(s)

Katelyn Goetz, Hamna Iqbal, Emily Bittle, Christina Hacker, Sujitra Pookpanratana, Oana Jurchescu

The charge-transfer (CT) state arising as a hybrid electronic state at the interface between charge donor and charge acceptor molecular units is important to a...

Collector Series-Resistor to Stabilize a Broadband 400 GHz Common-Base Amplifier

October 14, 2021

Author(s)

Jerome Cheron, Dylan Williams, Richard Chamberlin, Miguel Urteaga, Kassi Smith, Nick Jungwirth, Bryan Bosworth, Chris Long, Nate Orloff, Ari Feldman

The indium phosphide (InP) 130 nm double-heterojunction bipolar transistor (DHBT) offers milliwatts of output power and high signal amplification in the lower...

Measuring the Neutron Lifetime with Record-Breaking Precision

October 13, 2021

Author(s)

Shannon Hoogerheide

An improved version of a "bottle" experiment lets researchers lower the uncertainty on this important parameter—but a tantalizing discrepancy remains.

Artificial intelligence for search and discovery of quantum materials

October 13, 2021

Author(s)

Aaron Kusne, Takeuchi Ichiro, Valentin Stanev, Johnpierre Paglione

Artificial intelligence and machine learning are becoming indispensable tools in many areas of physics, including astrophysics, particle physics, and climate...

Cryogenic Characterization of a Superconductor Quantum-Based Microwave Reference Source for Communications and Quantum Information

October 13, 2021

Author(s)

Alirio De Jesus Soares Boaventura, Justus Brevik, Dylan Williams, Nathan Flowers-Jacobs, Manuel Castellanos Beltran, Anna Fox, Pete Hopkins, Paul Dresselhaus, Samuel P. Benz

We are developing a new instrument, the RF Josephson arbitrary waveform synthesizer (RF-JAWS), for communications metrology and quantum information applications...

Magnetic depth profiling Co/Cu multilayers to investigate magnetoresistance

October 12, 2021

Author(s)

John Unguris, D. Tulchinsky, Michael H. Kelley, Julie Borchers, Joseph Dura, Charles Majkrzak, S. Y. Hsu, R. Loloee, W. P. Pratt, J. Bass

The magnetic microstructure responsible for the metastable high resistance state of weakly coupled, as-prepared [Co(6nm)/Cu(6nm)] 20 multilayers was analyzed...

Electronic Excitation and Electron Interaction in Borazine

October 12, 2021

Author(s)

John P. Doering, Aharon Gedanken, A. P. Hitchcock, P. Fisher, J. H. Moore, Krishnan Raghavachari, James K. Olthoff, J. A. Tossell, M. B. Robin

Desorption of Ions from Rat Membranes: Selectvity of Different Ionization Techniques

October 12, 2021

Author(s)

Catherine Fenselau, James K. Olthoff, D. N. Heller, R. J. Cotter, Y. Kishimoto, M. Uy

The Design and Self-Calibration of Inductive Voltage Dividers for an Automated Impedance Scaling Bridge

October 12, 2021

Author(s)

Bryan C. Waltrip, Svetlana Avramov-Zamurovic, Andrew D. Koffman

The design and construction of an inductive voltage divider (IVD) for use in impedance bridge applications in the 20 Hz to 20 kHz frequency range is described...

A Standardised Computer Data File Format for Storage, Transport, and Off-line Processing of Partial Discharge Data

October 12, 2021

Author(s)

T. Huecker, P. Von Glahn, H. G. Kranz, T. Okamoto

Some Statistical Methods Applicable to Key Comparisons Studies

October 12, 2021

Author(s)

Hariharan K. Iyer, Chih-Ming Wang, Dominic F. Vecchia

Results of International Key Comparisons of National Measurement Standards provide the technical basis for the Mutual Recognition Arrangement formulated by Le...

EVALUATION OF INDUCTIVE VOLTAGE DIVIDERS AND 10 nF CAPACITORS IN A CAPACITANCE CALIBRATION METHOD

October 12, 2021

Author(s)

Svetlana Avramov-Zamurovic, Andrew D. Koffman, Bryan C. Waltrip

Researchers within the Quantum Electrical Metrology Division at the National Institute of Standards and Technology (NIST) have implemented a calibration...

Near-Field, Spherical-Scanning Antenna Measurements With Nonideal Probe Locations

October 12, 2021

Author(s)

Ronald C. Wittmann, Bradley Alpert, Michael H. Francis

We introduce a near-field, spherical-scanning algorithm for antenna measurements that relaxes the usual condition requiring data points to be on a regular...

Comment and Discussion on Digital Processing of PD Pulses

October 12, 2021

Author(s)

P. Von Glahn

Theory of Curvature and Grooving Effects in DIGM - II: the Mathematics

October 12, 2021

Author(s)

O Penrose, John W. Cahn

We examine and solve the mathematical problems that arise when diffusion induced grain boundary motion is formulated as a free boundary problem, i.e. as a...

Imperfect Surface Order and Functionalization in Vertical Carbon Nanotube Arrays Probed by Near Edge X-ray Absorption Fine Structure Spectroscoy (NEXAFS)

October 12, 2021

Author(s)

T Hemraj-Benny, S Banerjee, S Sambasivan, Daniel A. Fischer, G Eres, Alexander Puretzky, David B. Geohegan, D H. Lowndes, J A. Misewich, S S. Wong

Probing surface order in nanotube systems is of fundamental importance for incorporation of these materials into practical electronic devices. The current study...

The Influence of Matrix and LaserEnergy on the Molecular MassDistribution of Synthetic Polymers Obtained by MALDI-TOF-MS

October 12, 2021

Author(s)

S Wetzel, Charles M. Guttman, J. Girard

The molecular mass distribution (MMD) obtained in synthetic polymer characterization by matrix-assisted laser desorption/ionizationtime-of-flight mass...

The Suppression of Orange-Peel Coupling in Magnetic Tunnel Junctions by Pre-Oxidation

October 12, 2021

Author(s)

William F. Egelhoff Jr., Robert McMichael, Cindi L. Dennis, Mark D. Stiles, Alexander J. Shapiro, Brian B. Maranville, Cedric J. Powell

We have have found that pre-oxidation of the bottom Co electrode in magnetic tunnel junctions (MTJs) very effectively suppresses orange-peel coupling. The...

Anomalous Asymmetric Intermixing in Pt/Ti

October 12, 2021

Author(s)

P Sule, M. Menyhard, L Kotis, J Labar, William F. Egelhoff Jr.

The ion-sputtering induced intermixing is studied by Monte-Carlo TRIM, molecular dynamics (MD) simulations, and Auger electron spectroscopy depth pro_ling (AES...

Combinatorial Study of Nickel-Gold P-Contacts for Blue Indium Gallium Nitride Light-Emitting Diodes

October 12, 2021

Author(s)

M T. Ahrens, E B. Stokes, Albert Davydov, Peter K. Schenck, Abhishek Motayed, T R. Harris, S T. Morton

Although the efficiency of the Gallium Nitride (GaN) Light Emitting-Diode (LED) has improved in the past decade, a great opportunity for further efficiency...

Conformation of Arborescent Polymers in Solution by Small-Angle Neutron Scattering: Segment Density and Core-Shell Morphology

October 12, 2021

Author(s)

Seok I. Yun, Kai-Chi Lai, R M. Briber, Steven Teertstra, M Gauthier, Barry J. Bauer

The radius of gyration (Rg) was determined as a function of generation number for arborescent polystyrenes with two different side chain molecular weights (Mw =...

Pb electrodeposition on (111)-textured Cu in the Presence and Absence of C1superscript -}: a Combined Oblique Incidence Reflectivity Difference and In-situ AFM Study

October 12, 2021

Author(s)

G Y. Wu, S E. Bae, A A. Gewirth, J Gray, X D. Zhu, Thomas P. Moffat, W Schwarzacher

Oblique incidence reflectivity difference measurements reveal differences in the earliest stages of growth between Pb electrodeposition on (111)-textured Cu in...

NEMI Tin Whisker Test Method Standards

October 12, 2021

Author(s)

I Boguslavsky, P Bush, E Kam-Lum, M Kwoka, J McCullen, K Spalding, K Vo, Maureen E. Williams

The need to better understand whisker growth has dramatically increased as component suppliers convert from tin-lead (SnPb) finishes to Pb-free finishes of Sn...

Cure Monitoring of Hydrosilation-Curable Silicones by Fluorescence Spectroscopy

October 12, 2021

Author(s)

Y Hotta, K Komatsu, Francis W. Wang

Cure monitoring of hydrosilation is needed to control the fabrication of medical devices from hydrosilation-curable silicones. The fluorescence spectrum of a...

Percolation Theory Prediction of Green Strength in Composites

October 12, 2021

Author(s)

Y Shim, Lyle E. Levine, Richard J. Fields

We have measured the mechanical strength of composites made by pressing mixed powders of deformable aluminum (Al) and non-deformable silicon carbide (SiC) as a...

Environmentally Enhanced Crack Growth in AlN

October 12, 2021

Author(s)

Roy W. Rice, C C. Wu, K R. McKinney, Stephen W. Freiman, L E. Dolhert, J H. Enloe

Three tests: (1) dynamic fatigue; (2) flexure strength, and (3) direct, double-cantilever beam stress intensity-crack velocity measurements carried out in air...

Determination of the Complex Modulus of a Supported Ultra-Thin Polymer Film

October 12, 2021

Author(s)

Christopher C. White, Wen-Li Wu

A novel technique to quantitatively measure the complex modulus of ultra-thin polymer films (sub micron) is described. This technique employs a new mechanical...

Tin Whisker Test Method Development

October 12, 2021

Author(s)

Valeska Schroeder, P Bush, Nick Vo, Maureen E. Williams

In response to legislation banning Pb from electronics, any component suppliers plan to implement tin-based lead-free surfaces finishes to replace current Sn-Pb...

Microstructural Development and Thermal Diffusivity of Al₂O₃ Thin Films Prepared by a Continuous-Dip Coating Process

October 12, 2021

Author(s)

E J. Gonzalez, B Hockey, Joseph J. Ritter

Films of -Al2O3, 4:m to 6:m thick, have been coated onto inconel using the continuous-dip coating technique. The as-deposited films on an Inconel 600 substrate...

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