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Search Publications

NIST Authors in Bold

Displaying 32601 - 32625 of 73697

Extraction of Sheet Resistance and Linewidth from All-Copper ECD Test-Structures Fabricated from Silicon Preforms

March 22, 2007
Author(s)
Byron J. Shulver, Andrew S. Bunting, Alan Gundlach, Les I. Haworth, Alan W. Ross, A. J. Smith, Anthony J. Snell, J. T. Stevenson, Anthony Walton, Michael W. Cresswell, Richard A. Allen
Test Structures for the extraction of Electrical Critical Dimensions (ECD) and having all-copper features with no barrier metal films have been fabricated. The advantage of this approach is that electrical measurements provide a non-destructive method for

N-Nitrosation of Amines by NO 2 and NO: A Theoretical Study

March 22, 2007
Author(s)
Yi-Lei Zhao, Stephen L. Garrison, Carlos A. Gonzalez, William D. Thweatt, M Marquez
Gas-phase nitrosation implies an alternative non-ionic pathway different from the nitrosonium-nitrosation by acidification of nitrite. Electronic structure calculations discussed in this work suggest a free radical mechanism, in which NO2 abstracts a

Study of Test Structures for Use as Reference Material in Optical Critical Dimension Applications

March 22, 2007
Author(s)
Richard A. Allen, Heather Patrick, Michael Bishop, Thomas Germer, Ronald G. Dixson, William Gutherie, Michael W. Cresswell
Optical critical dimension (OCD) metrology has rapidly become an important technology in supporting the worldwide semiconductor industry. OCD relies on a combination of measurement and modeling to extract the average dimensions of an array of identical

Cell Phone Forensic Tools: An Overview and Analysis Update

March 21, 2007
Author(s)
Richard Ayers, Wayne Jansen, Aurelien M. Delaitre, Ludovic Moenner
Cell phones and other handheld devices incorporating cell phone capabilities (e.g., Personal Digital Assistant (PDA) phones) are ubiquitous. Rather than just placing calls, certain phones allow users to perform additional tasks such as SMS (Short Message

Computer Security Division 2006 Annual Report

March 21, 2007
Author(s)
Tanya L. Brewer, Kevin M. Stine
This report covers the work conducted within the National Institute of Standards and Technology's Computer Security Division during the Fiscal Year 2006. It discusses all projects and programs within the Division, staff highlights, and publications. For

Critical Frequency Estimates for Thermowells

March 21, 2007
Author(s)
David Bartran, Dean C. Ripple
The ASME Performance Test Code, PTC 19.3, establishes the service ratings of thermowells in terms of static pressure limitations and susceptibility of the thermowell to flow-induced resonance. It relies on a simplified method to establish the resonant

Environment-Controlled Spin Coating to Orient Microdomains in Thin Block Copolymer Films

March 20, 2007
Author(s)
Sangcheol Kim, R M. Briber, Alamgir Karim, Ronald L. Jones, H C. Kim
We demonstrate a simple and fast methodology to control the orientation of cylindrical microdomains in thin block copolymer films using environment-controlled spin coating. During spinning, the preferential affinity of vapor atmosphere successfully directs

A Broadband High Spectral Brightness Fiber-Based Two-Photon Source

March 19, 2007
Author(s)
Jingyun Fan, Alan L. Migdall
After characterizing the Raman scattering in a fused silica polarization-maintaining microstructure optical fiber, we built a fiber-based two-photon light source of high spectral brightness, broad spectral range, and very low noise background at room

High Carrier Mobility Polythiophene Thin Films: Structure Determination by Experiment and Theory

March 19, 2007
Author(s)
Dean M. DeLongchamp, Regis J. Kline, Eric K. Lin, Daniel A. Fischer, Lee J. Richter, Leah A. Lucas, Martin Heeney, Iain McCulloch, John E. Northrup
We exploit the unprecedented crystallinity of poly(2,5-bis(3-alkylthiophene-2-yl)thieno[3,2-b]thiophenes) (pBTTTs) high performance semiconducting polymers to study structural detail within 25 nm thick films of a pBTTT with tetradecyl side chains (pBTTT

Mid-Infrared Imaging With a Solid Immersion Lens and Broadband Laser Source

March 19, 2007
Author(s)
Chris A. Michaels
An approach to increasing the spatial resolution attainable with infrared (IR) microscopy involves the application of hemispherical solid immersion lenses (SIL). The hemispherical SIL lens can produces image formation free of geometric aberration, wherein

Estimation of Kov ts Retention Indices Using Group Contributions

March 17, 2007
Author(s)
Stephen E. Stein, Valeri I. Babushok, Robert L. Brown, Peter J. Linstrom
We have constructed a group contribution method for estimating Kov ts retention indices by using observed data from a set of diverse organic compounds. Our database contains observed retention indices for over 35,000 different molecules. These were

Asymmetrical Domain Nucleation and Unusual Magnetization Reversal of Ultrathin Co Films and Co/Pt Multilayers With Perpendicular Anisotropy

March 16, 2007
Author(s)
Yu L. Iunin, Yury P. Kabanov, Valerian I. Nikitenko, X M. Cheng, Alexander J. Shapiro, Robert D. Shull, C L. Chien
The features of magnetization reversal in Pt/[CO/Pt]_n}/Pt multilayers (n = 1, 2, 4) have been studied using magneto-optical Kerr microscopy. Asymmetric nucleation centers were revealed where domains form at different positions for up or down magnetic

Component Segregation in Model Chemically Amplified Resists

March 15, 2007
Author(s)
John T. Woodward IV, Theodore Fedynyshyn, David Astolfi, Susan Cann, Michael Leeson
We have applied chemical force microscopy (CFM) to probe the chemical segregation of resist materials. CFM is capable of providing simultaneous information about surface topography and chemical heterogeneity of partiallt developed resist films. We have

A new model of pulse oximetry: Two-dimensional pulsation

March 14, 2007
Author(s)
Shao Yang, Paul B. Batchelder, Dena M. Raley
We developed a two-dimensional pulsation model of pulse oximetry. Instead of a one-dimensional single layer as in the conventional theory, the arteries pulsate in two dimensions taking into account the effect of probing light that does not pass through the

Absolute frequency measurement of the neutral 40 Ca optical frequency standard at 657 nm based on microkelvin atoms

March 14, 2007
Author(s)
G Wilpers, Christopher W. Oates, Scott A. Diddams, A Bartels, Tara M. Fortier, Windell Oskay, James C. Bergquist, Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Leo W. Hollberg
We report an absolute frequency measurement of the optical clock transition at 657 nm in 40Ca with a relative uncertainty of 7.5x10 -15, the most accurate frequency measurement of a neutral atom optical transition to date. Relative instabilities of 2x10

Properties of a 50/50 Mixture of Jet-A + S-8

March 14, 2007
Author(s)
Thomas J. Bruno, Arno D. Laesecke, Stephanie L. Outcalt, Hans-Dieter Seelig, Beverly L. Smith
This report describes measurement efforts performed on the mixture of aviation fuels: Jet-A + S-8*. The primary mixture is a 50/50 (vol/vol) combination of the two fuels. Measurements include chemical analysis, density, viscosity, speed of sound and vapor

Reliability and Characterization Challenges for Nano-Scale Electronic Devices

March 14, 2007
Author(s)
John S. Suehle, Hao Xiong, Moshe Gurfinkel
Scaling electronic devices to nano-scale dimensions may introduce unforeseen physical mechanisms that may seriously compromise device reliability. It has been discussed that as individual atoms comprise a larger fraction of the actual device area, defects

Segmentation and Classification of Human Forms Using LADAR Data

March 14, 2007
Author(s)
James S. Albus, Tsai Hong Hong, Tommy Chang
High resolution LADAR images of scenes containing human forms have been segmented and algorithms developed for recognizing human forms in various positions in both cluttered and uncluttered scenes. Registration of LADAR and color CCD images enhance the

Sensor Location through Linear Programming with Arrival Angle Constraints

March 14, 2007
Author(s)
Camillo Gentile, J Shiu
In previous work, we established a linear programming framework to determine sensor location from measured link distances between neighboring nodes in a network. Besides providing greater accuracy compared to other techniques, linear programs in particular

Chip scale atomic devices

March 13, 2007
Author(s)
Svenja A. Knappe, P Schwindt, Vladislav Gerginov, V Shah, Alan Brannon, Brad Lindseth, Li-Anne Liew, Hugh Robinson, John Moreland, Z Popovic, Leo W. Hollberg, John E. Kitching
We give an overview over our research on chip-scale atomic devices. By miniaturizing optical setups based on precision spectroscopy, we develop small atomic sensors and atomic references such as atomic clocks, atomic magnetometers, and optical wavelength
Displaying 32601 - 32625 of 73697
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