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Search Publications

NIST Authors in Bold

Displaying 1451 - 1475 of 2958

Observation of a promethium complex in solution

May 22, 2024
Author(s)
Bruce D. Ravel, Darren Driscoll, Frankie White, SUBHAMAY PRAMANIK, Jeffrey Einkauf, Dmytro Bykov, Santanu Roy, Richard Mayes, Laetitia Delmau, Samantha Schrell, Thomas Dyke, April Miller, Matt Silveira, Silveira2 van Cleve, Roy Copping, Sandra Davern, Santa Jansone-Popova, Ilja Popovs, Alexander Ivanov
Lanthanide rare earth metals are ubiquitous in modern technologies, but we know little about chemistry of the 61st element, promethium (Pm), a lanthanide which is highly radioactive and inaccessible. Despite its significance, Pm has conspicuously been

Steady State Vapor Bubble in Pool Boiling

February 3, 2016
Author(s)
An Zou, Ashish Chanana, Amit Agrawal, Peter C. Wayner, Jr., Shalabh C. Maroo
Boiling, a dynamic and multiscale process, has been studied for over five decades; however, a comprehensive understanding of the process is still lacking. The bubble ebullition cycle, which involves nucleation, growth and departure, happens over a very

Topological Robustness of Transport Statistics for Photons in a Synthetic Gauge Field

August 20, 2014
Author(s)
Sunil Mittal, Jingyun Fan, Sanli Faez, Alan L. Migdall, Jacob M. Taylor, Mohammad Hafezi
Electronic transport through a disordered medium leads generically to localization, where conductance drops exponentially with system size, even at zero temperature. The addition of gauge fields to disordered media leads to fundamental changes in transport

Creation of a six-atom Schrodinger cat state

December 1, 2005
Author(s)
Dietrich G. Leibfried, Emanuel H. Knill, Signe Seidelin, Joseph W. Britton, Brad R. Blakestad, J Chiaverini, David Hume, Wayne M. Itano, John D. Jost, C. Langer, R Ozeri, Rainer Reichle, David J. Wineland
Among highly entangled states of multiple quantum systems, Schrödinger cat states are particularly useful. Cat states are equal superpositions of two maximally different quantum states. They are a fundamental resource in fault-tolerant quantum computing

NIST Atomic and Molecular Databases on the World Wide Web

August 1, 1998
Author(s)
Robert A. Dragoset, Peter J. Mohr, Karen J. Olsen, Edward B. Saloman, G G. Wiersma, D Zucker
The Physics Laboratory of the National Institute of Standards and Technology is using the world wide web to disseminate the physical reference data it has been producing and/or evaluating. Web databases have been developed, each with an interface specially

Development of Publicly Available Forensic DNA Sequence Mixture Data

March 12, 2025
Author(s)
Erica Romsos, Kevin Kiesler, Carolyn Steffen, Lisa Borsuk, Sarah Riman, Lauren Mullen, Jodi Irwin, Peter Vallone, Katherine Gettings
Background: In 2018, the Next-Generation Sequencing Committee of SWGDAM queried bioinformatic and statistical interpretation method developers regarding data needs for the development of sequence-based probabilistic genotyping software. Methods: Based on

Generation of perfect vortex beams by dielectric geometric metasurface for visible light

October 31, 2021
Author(s)
Qianwei Zhou, Mingze Liu, Wenqi Zhu, Lu Chen, Yongze Ren, Henri Lezec, Yanqing Lu, Ting Xu, Amit Agrawal
Perfect vortex beam (PVB) is a propagating optical field carrying orbital angular momentum (OAM) with a radial intensity profile that is independent of topological charge. PVB can be generated through the Fourier transform of a Bessel-Gaussian beam, which

The Cu II Spectrum

February 24, 2017
Author(s)
Alexander Kramida, Gillian Nave, Joseph Reader
New wavelength measurements in the vacuum ultraviolet (VUV), ultraviolet and visible spectral regions have been combined with available literature data to refine and extend the description of the spectrum of singly ionized copper (Cu II). In the VUV region

Calibration of rheometers for cementitious materials

May 16, 2016
Author(s)
Chiara F. Ferraris, Nicos Martys, William L. George, Edward J. Garboczi, Alex Olivas
The calibration of rheometers to determine the rheological properties of cement based materials ranging from cement paste to concrete cannot be done using standard oils as they are cost prohibitive and do not possess sufficient granularity to test slip

Theory of Curvature and Grooving Effects in DIGM I: The Physics

October 16, 2008
Author(s)
John W. Cahn, O Penrose
We take the formulation of steady-state diffusion-induced grain boundary motion from our earlier work [1], and combine it with the results of Mullins' theory for surface grooves from steadily moving grain boundaries, to formulate a theory of DIGM in thin

Electrodeposition of Cu on Ru Barrier Layers for Damascene Processing

December 2, 2005
Author(s)
Thomas P. Moffat, Marlon L. Walker, P J. Chen, John E. Bonevich, William F. Egelhoff Jr., Lee J. Richter, Daniel Josell, C A. Witt, T Aaltonen, M Ritala, M Leskela
… acid solution, followed by rapid wet transfer to a Cu plating bath, enables robust superfilling of trenches and …

LEAD-FREE SOLDER DATA: COLLECTION AND DEVELOPMENT

January 10, 2005
Author(s)
Thomas A. Siewert, David R. Smith, Yi-Wen Cheng, Juan C. Madeni, S X. Liu
The rising interest in lead-free solders creates a need for complete property data on the various lead-free solder compositions. Various types of data are available, but are widely dispersed through the literature. To improve the sharing of this important

Fatigue and Damage Tolerance of Y-TZP Ceramics in Layered Biomechanical Systems

October 1, 2004
Author(s)
Yu Zhang, Antonia Pajares, Brian R. Lawn
The fatigue properties of fine-grain Y-TZP in cyclic flexural testing are studied. Comparative tests on a coarser-grain alumina provide a baseline control. A bilayer configuration with ceramic plates bonded to a compliant polymeric substrate and loaded

Layered Droplet Microstructures in Sheared Emulsions: Finite-Size Effects

November 1, 2002
Author(s)
Jai A. Pathak, M C. Davis, Steven D. Hudson, Kalman D. Migler
We investigate the influence of confinement on the steady state microstructure of emulsions sheared between parallel plates, in a regime where the average droplet dimension is comparable to the gap width between the confining walls. Utilizing droplet

Coherent Phase Equilibria in a Bending Film

April 1, 2002
Author(s)
Alexander L. Roytburd, Julia Slutsker
The theory of coherent phase diagrams is expanded to phase transformations in films. Coherent phase transformations in a free standing film or a thin plate are considered. It is suggested that the misfit between the phases dictates their layer arrangement

Optomechanical feedback cooling of a 5 mm long torsional mode

November 30, 2023
Author(s)
Dianqiang Su, Yuan Jiang, Pablo Solano, Luis Orozco, John R. Lawall, Yanting Zhao
We report three orders of magnitude optical cooling of the fundamental torsional mode of a 5 mm-long, 550 nm diameter optical nanofiber. The rotation of the nanofiber couples to the polarization of guided laser fields. We use a weak laser probe to monitor
Displaying 1451 - 1475 of 2958
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