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Search Publications

NIST Authors in Bold

Displaying 19651 - 19675 of 73832

Mid-Infrared Time-Resolved Frequency Comb Spectroscopy of Transient Free Radicals

June 10, 2014
Author(s)
Adam J. Fleisher, Bryce Bjork, Thinh Q. Bui, Kevin C. Cossel, Mitchio Okumura, Jun Ye
Quantitative measurements in chemical kinetics require unambiguous determinations of reactant, intermediate, and product concentrations on time scales faster than the reaction rate. Direct absorption spectroscopy in the mid-infrared (mid-IR) can fulfill

650 GHz bistatic scattering measurements on human skin

June 9, 2014
Author(s)
Richard A. Chamberlin, Natalie P. Mujica-Schwahn, Erich N. Grossman
Many groups are developing submillimeter cameras that will be used to screen human subjects for improvised explosive devices (IEDs) and other threat items hidden beneath their clothing. To interpret submillimeter camera images the scattering properties

Air-Stable Electron Depletion of Bi 2 Se 3 Using Molybdenum Trioxide into the Topological Regime

June 9, 2014
Author(s)
Mark T. Edmonds, Jack T. Hellerstedt, Anton Tadich, Alex Schenk, Kane Michael O'Donnell, Jacob Tosado, Nicholas Butch, Paul Syers, Johnpierre Paglione, Michael S. Fuhrer
We report on electronic transport measurements of dual-gated nano-devices of the low-carrier density topological insulator Bi 1.5Sbd0.05Te 1.7Se 1.3. In all devices the upper and lower surface states are independently tunable to the Dirac point by the top

Design and Analysis of a 150 K Cascade Joule-Thomson Microcooler

June 9, 2014
Author(s)
Ray Radebaugh, Peter E. Bradley, Collin J. Coolidge, Ryan J. Lewis, Y.C. Lee
Lightweight and compact microcoolers are needed for advanced, hand-held infrared systems. A temperature of 150 K is adequate for high sensitivity with some of the latest IR detectors, which simplifies the cooling requirements compared to 80 K detectors

MANUFACTURING PROCESS INFORMATION MODELS FOR SUSTAINABLE MANUFACTURING

June 9, 2014
Author(s)
Mahesh Mani, Kevin W. Lyons, Lina Valivullah, Satyandra K. Gupta
Sustainable manufacturing systems use processes, methodologies, and technologies that are energy efficient and environmentally friendly. To create and maintain such systems, well-defined measurement methodologies and corresponding manufacturing information

Spray-deposition and photopolymerization of organic-inorganic thiol-ene resins for fabrication of superamphiphobic surfaces

June 9, 2014
Author(s)
Li Xiong, Laken Kendrick, Hannele Heusser, Bradley J. Sparks, Christopher Stafford, James T. Goetz, Sergei Nazarenko, Derek L. Patton
Superamphiphobic surfaces, exhibiting high contact angles and low contact angle hysteresis to both water and low surface tension liquids, have attracted a great deal of attention in recent years due to the importance in many practical applications. In this

Characterizing a Noninsertable Directional Device Using the NIST Uncertainty Framework

June 6, 2014
Author(s)
Jeffrey A. Jargon, Dylan F. Williams, Paul D. Hale, Michael D. Janezic
We characterize and provide uncertainties for a noninsertable, directional device over a frequency range of 90 to 100 GHz using the NIST Microwave Uncertainty Framework in conjunction with a commercial vector network analyzer. Our device consists of a

Construction, Measurement, Shimming, and Performance of the NIST-4 Magnet System

June 6, 2014
Author(s)
Frank Seifert, Alireza Panna, Leon Chao, Bing Han, Shisong Li, Yusi A. Cao, Darine El Haddad, Stephan Schlamminger, Heeju Choi, Lori Haley
The magnet system is one of the key elements of a watt balance. For the new watt balance currently under construction at the National Institute of Standards and Technology a permanent magnet system was chosen. We describe the detailed construction of the

Design of MEMS based three-axis motion stage by incorporating a nested structure

June 5, 2014
Author(s)
Yong Sik Kim, Nicholas G. Dagalakis, Satyandra K. Gupta
A new design of three degrees-of-freedom (DOFs) translational motion stage (XYZ-stage) is presented in this paper. This XYZ-stage is based on Micro-electro-mechanical systems (MEMS) and designed by combining three existing 1-DOF motion stages through a

Energy Control Paradigm for Compliance-Free Reliable Operation of RRAM

June 5, 2014
Author(s)
Pragya R. Shrestha, David M. Nminibapiel, Jihong Kim, Jason P. Campbell, Kin P. Cheung, Shweta Deora, G. Bersuker, Helmut Baumgart
We demonstrate reliable RRAM operation by controlling the forming energy via short voltage pulses (picosecond range) which eliminates the need for a current compliance element. We further show that the dissipated energy during forming and SET/RESET

High Sensitivity Optomechanical Reference Accelerometer Over 10 kHz

June 5, 2014
Author(s)
Felipe Guzman, Lee M. Kumanchik, Jon R. Pratt, Jacob M. Taylor
We present an optically detected mechanical accelerometer that achieves a sensitivity of 100 ng/√Hz over a bandwidth of 10 kHz and is traceable. We have incorporated a Fabry-Perot fiber-optic micro-cavity that is currently capable of measuring the test

ITL Forensic Science Program

June 5, 2014
Author(s)
Barbara Guttman, Martin Herman, Michaela Iorga, Larry Feldman, Kim Quill
Forensic science provides the methodologies for understanding crime scenes. It is used for analyzing evidence, identifying suspects, and prosecuting and convicting criminals while exonerating innocent people. To maintain the integrity of the U.S. criminal

Transport Properties of Fluids near Critical Points

June 5, 2014
Author(s)
Jan V. Sengers, Richard A. Perkins
This chapter reviews the currently available information concerning the behavior of transport properties near the vapor-liquid critical point of fluids and fluid mixtures. Special attention is devoted to the behavior of the thermal conductivity which

A study of shear banding in polymer solutions

June 4, 2014
Author(s)
Michael E. Cromer, Glenn Fredrickson, Gary Leal
In a recent letter (Cromer et al. Phys. Fluids 2013) we showed, for the first time, the existence of a steady shear-banded velocity profile for a polymer solution with an underlying monotonic constitutive curve. The driving mechanism is the coupling of the
Displaying 19651 - 19675 of 73832
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