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 16401 - 16425 of 74053

Enzyme-catalyzed Reactions

May 23, 2016
Author(s)
Robert N. Goldberg
The thermodynamic principles that pertain to both chemical and overall biochemical reactions are discussed with particular emphasis on enzyme-catalyzed reactions. Chemical reactions involve specific species (which may also be biochemical importance) and

k-asymmetric spin-splitting at the interface between transition metal ferromagnets and heavy metals.

May 23, 2016
Author(s)
Sergiy Grytsyuk, Abderrezak Belabbes, Paul M. Haney, Hyun-Woo Lee, Kyung Jin Lee, Mark D. Stiles, Udo Schwingenschlogl, Aurelien Manchon
We systematically investigate the spin-orbit coupling-induced band splitting originating from inversion symmetry breaking at the interface between a Co monolayer and 4d (Tc, Ru, Rh, Pd, and Ag) or 5d (Re, Os, Ir, Pt, and Au) transition metals. In spite of

Near-field microwave microscopy of one-dimensional nanostructures

May 23, 2016
Author(s)
Samuel Berweger, Paul T. Blanchard, Rebecca C. Quardokus, Frank W. DelRio, Thomas Mitchell (Mitch) Wallis, Pavel Kabos, Sergiy Krylyuk, Albert Davydov
With the ability to measure sample conductivity with nanometer spatial resolution, scanning microwave microscopy (SMM) is a powerful tool to study nanoscale electronic systems and devices. Here we demonstrate the general capability to image electronic

Physical Properties of the Ce 2 MAl 7 Ge 4 Heavy-Fermion Compounds (M = C0, Ir,Ni,Pd)

May 23, 2016
Author(s)
N. J. Ghimire, S. K. Cary, S. Eley, N. A. Wakeham, P. F. S. Rosa, T. Albrecht-Schmitt, Y. Lee, M. Janoschek, Craig Brown, L. Civale, J. D. Thompson, F. Ronning, E. D. Bauer
The synthesis, crystal structure and physical properties by means of single crystal x-ray diffraction, neutron powder diffraction, magnetic, thermal and transport measurements of the new heavy fermion compounds Ce 2M Al 7Ge 4(M = Co, Ir, Ni, Pd) are

Structure Elucidation of Mixed-Linker Zeolitic Imidazolate Frameworks by Solid-State 1H CRAMPS NMR Spectroscopy and Computational Modeling

May 23, 2016
Author(s)
Ryan C. Nieuwendaal, Krishna Jayachandrababu, Ross Verploegh, Johannes Leisen, David Sholl, Sankar Nair
Mixed-linker zeolitic imidazolate frameworks (ZIFs) are nanoporous materials that exhibit continuous and controllable tunability of properties like effective pore size, hydrophobicity and organophilicity. The structure of mixed-linker ZIFs has been studied

Thermography and Weld Strength Characterization of Thermoplastic Extrusion 3D Printing

May 23, 2016
Author(s)
Jonathan E. Seppala, Kaitlyn E. Hillgartner, Chelsea S. Davis, Kalman D. Migler
In fused filament fabrication (FFF), a material extrusion additive manufacturing (AM) method, thermoplastic filament is extruded though a rastering nozzle on prior layers building a 3 dimensional object. The resulting strength of the FFF produced part is

Towards Estimating the Uncertainty Associated with 3D Geometry Reconstructions from Medical Image Data

May 23, 2016
Author(s)
Zachary H. Levine, Karim O. Genc, Stephen M. Luke, Todd Pietiela, Ross T. Cotton, Benjamin Ache, Phillipe G. Young, Marc Horner, Kevin C. Townsand
3D image based modeling for visualization, physics-based simulation or additive manufacturing, is becoming more common within R&D labs in academia, government and commercial industry. Computed Tomography (CT) is a common imaging modality used to obtain the

Large-scale Time-lapse Microscopy of Oct4 Expression in Human Embryonic Stem Cell Colonies

May 22, 2016
Author(s)
Kiran Bhadriraju, Michael Halter, Julien M. Amelot, Peter Bajcsy, Joe Chalfoun, Antoine Vandecreme, Barbara Mallon, Kye-yoon Park, John T. Elliott, Subhash Sista, Anne L. Plant
Identification of critical characteristics of therapeutically active cells, and quantification of those characteristics, are essential for assuring consistency and potency of cell therapy products. We have developed image analysis and visualization

Effective Spin-1/2 Scalar Chiral Order on Kagome Lattices in Nd 3 Sb 3 Mg 2 O 14

May 20, 2016
Author(s)
A. Scheie, M. Sanders, J. Krizan, Yiming Qiu, R. J. Cava, Collin L. Broholm
We introduce Nd 3Sb 3Mg 2O 14 with ideal kagome lattices of neodymium ions in ABC stacking. Thermodynamic measurements show a Curie-Weiss temperature of θ cw = -0.12 Jm a Bd 3+ spin 1/2 Kramers doublet ground state, and as second order phase transition at

Geometrical pumping with a Bose-Einstein condensate

May 20, 2016
Author(s)
Lauren M. Aycock, Dina Genkina, Seiji Sugawa, Max Schemmer, Hsin I Lu, Ian Spielman
We realized a quantum "charge" pump for a Bose-Einstein condensate (BEC) in a novel bipartite magnetic lattice, whose bands are characterized by non-trivial topological invariants: the Zak phases. For each band, the Zak phase is determined by that band's

Multiple Sensor Detection of Process Phenomena in Laser Powder Bed Fusion

May 20, 2016
Author(s)
Brandon M. Lane, Eric P. Whitenton, Shawn P. Moylan
Laser powder bed fusion (LPBF) is an additive manufacturing (AM) process in which a high power laser melts metal powder layers into complex, three-dimensional shapes. LPBF parts are known to exhibit relatively high residual stresses, anisotropic

Pore Chemistry and Size Control in Hybrid Porous Materials for Acetylene Capture from Ethylene

May 20, 2016
Author(s)
Xili Cui, Kaijie Chen, Huabin Xing, Qiwei Yang, Rajamani Krishna, Zongbi Bao, Hui Wu, Wei Zhou, Xinglong Dong, Yu Han, Bin Li, Qilong Ren, Michael J. Zaworotko, Banglin Chen
The trade-off between physical adsorption capacity and selectivity of porous materials is a major barrier for efficient gas separation and purification through physisorption. We report control over pore chemistry and size in copper coordination networks

Representation of PIV Chain-of-Trust for Import and Export

May 20, 2016
Author(s)
Hildegard Ferraiolo, Ramaswamy Chandramouli, Ketan L. Mehta, Jason Mohler, Stephen Skordinski, Steven Brady
This document provides a common XML-based data representation of a chain-of-trust record to facilitate the exchange of PIV Card enrollment data. The exchanged record is the basis to personalize a PIV Card for a transferred employee and also for service

Towards a dynamic pressure standard based on laser absorption spectroscopy

May 20, 2016
Author(s)
Kevin O. Douglass, Douglas A. Olson
We describe an approach for creating a cost-effective, field deployable dynamic pressure standard based on measurement of fundamental quantum properties of molecular systems. From the linewidth and intensities of ro-vibrational transitions we plan on
Displaying 16401 - 16425 of 74053
Was this page helpful?