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Search Publications

NIST Authors in Bold

Displaying 2401 - 2425 of 2915

A thickness-shear MEMS resonator employing electromechanical transduction through a coplanar waveguide

May 21, 2012
Author(s)
Ward L. Johnson, Thomas M. Wallis, Pavel Kabos, Eduard Rocas, Juan C. Collado Gomez, Li-Anne Liew, Albert Davydov, Alivia Plankis, Paul R. Heyliger
The design, modeling, fabrication, and characterization of a vibrationally trapped thickness-shear MEMS resonator is presented. This device is intended to avoid various limitations of flexural MEMS resonators, including nonlinearity, clamping losses

Capacitive readout technique for studies of dissipation in GaN nanowire mechanical resonators

November 11, 2011
Author(s)
Kristine A. Bertness, Joshua R. Montague, Norman A. Sanford, Victor Bright, Charles T. Rogers
A variable-temperature, homodyne reflectometry measurement technique for detecting nanoscale mechanical motion has recently been developed. We have extended this technique to make the first all-electrical measurements of an ensemble of as-grown, c-axis

Electronic transport in two dimensional graphene

May 16, 2011
Author(s)
Shaffique Adam, Sankar Das Sarma, Euyheon Hwang, Enrico Rossi
We provide a broad review of fundamental electronic properties of two-dimensional graphene with the emphasis on density and temperature dependent carrier transport in doped or gated graphene structures. A salient feature of our review is a critical

Microfluidic Mixing and the Formation of Nanoscale Lipid Vesicles

April 27, 2010
Author(s)
Andreas Jahn, Samuel M. Stavis, Jennifer S. Hong, Wyatt N. Vreeland, Don L. DeVoe, Michael Gaitan
We investigate the formation of unilamellar lipid vesicles (liposomes) with diameters of tens of nanometers by microfluidic hydrodynamic focusing (MHF). Our study includes liposome synthesis experiments and numerical modeling of our microfluidic

The Color Quality Scale

March 15, 2010
Author(s)
Wendy L. Davis, Yoshihiro Ohno
The Color Rendering Index (CRI) has been shown to have deficiencies when applied to white light-emitting diode (LED) based sources. Further, evidence suggests that the restricted scope of the CRI unnecessarily penalizes some light sources with desirable

Fabrication of GaAs/AlOx micropillars for small mode volume

January 20, 2010
Author(s)
Richard P. Mirin
Micropillar devices have shown promise as single photon sources for applications in quantum key distribution as well as single photon metrology and fundamental science. For higher temperature operation (77K), a high quality (Q) factor cavity and a small

Predicting Failure in Mammalian Enamel

January 16, 2009
Author(s)
Brian R. Lawn, James J. Lee, Paul Constantino, Peter Lucas
Dentition is a vital element of human and animal function, yet there is little fundamental knowledge about how tooth enamel endures under stringent oral conditions. This paper describes a novel approach to the issue. Model glass dome specimens fabricated

A Computational Model of the Human Visual Cortex

March 20, 2008
Author(s)
James S. Albus
The brain is first and foremost a control system that is capable of building an internal representation of the external world, and using this representation to make decisions, set goals and priorities, formulate plans, and control behavior with intent to

New Global Communication Process in Thermodynamics: Impact on Quality of Published Experimental Data

October 11, 2006
Author(s)
Michael D. Frenkel, Robert D. Chirico, Vladimir Diky, Chris D. Muzny, Qian Dong, K N. Marsh, John H. Dymond, William A. Wakeham, Stephen E. Stein, Erich Koenigsberger, Anthony R. Goodwin, Joe W. Magee, Michiel Thijssen, William M. Haynes, Suphat Watanasiri, Marco Satyro, Martin Schmidt, Andrew I. Johns, Gary R. Hardin
Thermodynamic data often represent a key resource in the search for new relationships between properties of chemical systems that constitutes the basis of the scientific discovery process. In addition, thermodynamic information is critical for development

Simulations of Optical Microscope Images

July 3, 2006
Author(s)
Thomas A. Germer, Egon Marx
The resolution of an optical microscope is limited by the optical wavelengths used. However, there is no fundamental limit to the sensitivity of a microscope to small differences in any of a feature's dimensions. That is, those limits are determined by

Ultraviolet Laser Damage of Carbon Nanotube Coatings on Thermal Detector Platforms

November 14, 2005
Author(s)
Darryl A. Keenan, Natalia Varaksa, Anne Dillon, Chaiwat Engtrakul, Stephen E. Russek, John H. Lehman
We have initiated a program to demonstrate the next generation of optical detector coatings using carbon nanotubes (CNTs). These coatings have been used on a variety of detector platforms for laser power and energy measurement standards. These coatings

Serrated Chip Morphology and Comparison with Finite Element Simulations

November 1, 2004
Author(s)
Laurent Deshayes, Robert W. Ivester, T Mabrouki, J F. Rigal
The complexity of chip formation in machining processes stems from the confluence of several physical phenomena - mechanical, thermal, and chemical - occurring at very high strain rate. The prediction of chip morphology depends on a fundamental

Microstructure-Based Simulation of Thermomechanical Behavior of Composite Materials by Object-Oriented Finite Element Analysis

December 1, 2002
Author(s)
N Chawla, B V. Patel, M Koopman, K K. Chawla, R Saha, B R. Patterson, Lin-Sien H. Lum, Stephen A. Langer
While it is well recognized that microstructure controls the physical and mechanical properties of a material, the complexity of the microstructure often makes it difficult to simulate by analytical or numerical techniques. In this paper we present a

A New Classification of Information: A Step on the Road to Interpretability

September 1, 2002
Author(s)
Larry H. Reeker, Albert W. Jones
Complex systems, such as manufacturing supply chains, are often modeled as a collection of interacting components with information flows between them. These components are frequently responsible for making a wide range of decisions that are implemented

A New Classification of Information: A Step on the Road to Interoperability

July 1, 2002
Author(s)
Albert T. Jones, Larry H. Reeker
Complex systems, such as manufacturing supply chains, are often modeled as a collection of interacting components with information flows between them. These components are frequently responsible for making a wide range of decisions that are implemented

Confinement Effects on the Spatial Extent of the Reaction Front in Ultrathin Chemically Amplified Photoresists

December 1, 2001
Author(s)
D L. Goldfarb, M Angelopoulos, Eric K. Lin, Ronald L. Jones, Christopher Soles, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, Wen-Li Wu
Sub-100 nm lithography poses strict requirements on photoresist material properties and processing conditions to achieve necessary critical dimension (CD) control of patterned structures. As resist thickness and feature linewidth decrease, fundamental
Displaying 2401 - 2425 of 2915
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