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NIST Authors in Bold

Displaying 23426 - 23450 of 74165

An Efficient Large-Area Grating Coupler for Surface Plasmon Polaritons

June 1, 2012
Author(s)
Stefan T. Koev, Amit K. Agrawal, Henri J. Lezec, Vladimir A. Aksyuk
We report the design, fabrication and characterization of a periodic grating of shallow rectangular grooves in a metallic film with the goal of maximizing the coupling efficiency of an extended plane wave (PW) of visible or near-IR frequency light into a

An instrumented bioreactor for mechanical stimulation and real-time, nondestructive evaluation of engineered cartilage tissue

June 1, 2012
Author(s)
Jenni R. Popp, Justine Roberts, Douglas V. Gallagher, Kristi S. Anseth, Stephanie Bryant, Timothy P. Quinn
Mechanical stimulation is essential for chondrocyte metabolism and cartilage matrix deposition. In vitro, mechanical stimulation is accomplished via culture in a bioreactor. Traditional methods for evaluating the developing tissue are destructive, time

Calibration of Laminar Flow Meters for Process Gases

June 1, 2012
Author(s)
John D. Wright, Thiago Cobu, Robert F. Berg, Michael R. Moldover
We calibrated three models of commercially-manufactured, laminar flow meters (LFMs) at four pressures (100 kPa, 200 kPa, 300 kPa, and 400 kPa) with five gases (N2, Ar, He, CO2, and SF6) over a 10:1 flow range using NIST’s primary flow standards as

Characteristics of Graphene for Quantized Hall Effect Measurements

June 1, 2012
Author(s)
Randolph E. Elmquist, Mariano A. Real, Irene G. Calizo, Brian G. Bush, Tian T. Shen, Nikolai N. Klimov, David B. Newell, Angela R. Hight Walker, Randall M. Feenstra
This paper describes concepts and measurement techniques necessary for characterization of graphene in the development of graphene-based quantized Hall effect (QHE) devices and resistance standards. We briefly contrast the properties of graphene produced

Framework for hybrid life-cycle inventory databases: BEES case study

June 1, 2012
Author(s)
Sangwon Suh, Barbara C. Lippiatt
In an effort to develop a whole building LCA tool, NIST is transforming new bottom-up BEES data into a hybrid database in which the strengths of both bottom-up and top-down approaches can be combined. The objective of this paper is to describe the

Graphene Epitaxial Growth on SiC(0001) for Resistance Standards

June 1, 2012
Author(s)
Mariano A. Real, Tian T. Shen, George R. Jones Jr., Randolph Elmquist, Johannes A. Soons, Albert Davydov
Epitaxial growth of graphene layers on 6H-SiC(0001) substrates have been studied in order to improve graphene's performance for metrological applications. A face-to-face (FTF) sublimation method at 2000 °C and in Ar background atmosphere is used to inhibit

ISODEC: Software for Calculating Diffraction Elastic Constants

June 1, 2012
Author(s)
Thomas H. Gnaeupel-Herold
A program is introduced that calculates diffraction elastic constants for the models according to Reuss, Hill, Kröner and inverse Kröner. For materials with preferred orientation it uses the orientation distribution function (ODF) to calculate the

Memristors with Flexible Electronic Applications

June 1, 2012
Author(s)
Nadine Gergel-Hackett, Joseph L. Tedesco, Curt A. Richter
In addition to the potential for memristors to be used in logic, memory, smart interconnects, and biologically-inspired architectures that could transform traditional silicon-based computing, memristors may enable such transformative technologies on

Nanoparticle Size and Shape Evaluation Using the TSOM Method

June 1, 2012
Author(s)
Bradley N. Damazo, Ravikiran Attota, Premsagar P. Kavuri, Andras Vladar
A novel through-focus scanning optical microscopy (TSOM) method that yields nanoscale information from optical images obtained at multiple focal planes will be used here for nanoparticle dimensional analysis. The TSOM method can distinguish not only size

On the need for an international effort to capture, share and use crystallisation screening data (failure and success)

June 1, 2012
Author(s)
David Gallagher, Janet Newman, Evan E. Bolton, Jochen M?Dieckmann, Vincent J. Fazio, David Lovell, Joseph R. Luft, Thomas S. Peat, David Ratcliffe, Roger A. Sayle, Edward H. Snell, Kerry Taylor, Pascal Vallotton, Sameer Velankar, Frank V. Delft
Crystallisation of biological macromolecules is seen by most structural biologists as a necessary evil, a means to the end, which is knowledge about a macromolecular structure. Crystallization remains largely a trial-and-error process, with extensive

Polarization-Analyzed Small-Angle Neutron Scattering. II. Mathematical Angular Analysis

June 1, 2012
Author(s)
Kathryn L. Krycka, Julie A. Borchers, Yumi Ijiri, Ryan Booth, Sara Majetich
SANS with longitudinal polarization analysis is a powerful technique to study magnetic morphology and domain interactions with directional sensitivity on the nancoscale. Here, by explicitly isolating the various nuclear-magnetic and magnetic-magnetic
Displaying 23426 - 23450 of 74165
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