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NIST Authors in Bold

Displaying 27626 - 27650 of 73697

Scalable arrays of doped silicon RF Paul traps

October 26, 2009
Author(s)
Joseph W. Britton, Dietrich G. Leibfried, James A. Beall, Brad R. Blakestad, Janus H. Wesenberg, David J. Wineland
We report techniques for the fabrication of multi-zone linear RF Paul traps which exploit the machinability and electrical conductivity of bulk doped silicon. The approach was verified by trapping and Doppler cooling 24Mg+ ions in two trap geometries: a

Uncooled, Millimeter-Scale Atomic Magnetometers with Femtotesla Sensitivity

October 26, 2009
Author(s)
John E. Kitching, Svenja A. Knappe, William C. Griffith, Jan Preusser, V Gerginov, Peter D. Schwindt, Vishal Shah, Ricardo Jimenez Martinez
We summarize recent results at NIST to develop high-performance yet highly miniaturized magnetic sensors based on atomic vapors confined in microfabricated alkali vapor cells. These sensors currently achieve sensitivities in the range of a few tens of

Magnetic Noise in a Low-Power Picotesla Magnetoresistive Sensor

October 25, 2009
Author(s)
Stephen E. Russek, Lu Yuan, Sean Halloran, Fabio C. da Silva, David P. Pappas, John M. Moreland, Sy-hwang Liou, Rui Zhang
We present a design of a low power, compact, magnetoresistive sensor. The key features of the design are(1) decreasing the noise by the use of a 64 element magnetic tunnel junction (MTJ) bridge,(2) reducing the magnetic noise by annealing the MTJ sensors

Creating a web-scale video collection for research

October 23, 2009
Author(s)
Paul D. Over, George M. Awad, Alan Smeaton, Colum Foley, James Lanagan
This paper begins by considering a number of important design questions for a web-scale, widely available, multimedia test collection intended to support long-term scientific evaluation and comparison of content-based video analysis and exploitation

Phosphorus Doping of Silicon at Substrate Temperatures Above 600 degC

October 22, 2009
Author(s)
P.E. Thompson, G.G. Jernigan, David S. Simons, P. Chi, B.T. Jonker, O.M.J. van 't Erve
P doping of Si during growth by molecular beam epitaxy (MBE) has been investigated in the temperature regime 700 oC to 870 oC. By designing a growth sequence that fully accounts for the P deposited in a delta-doped layer, and then tracks the P as it

A Fast, Simple Wafer-level Hall-Mobility Measurement Technique

October 21, 2009
Author(s)
Liangchun (. Yu, Kin P. Cheung, Vinayak Tilak, Greg Dunne, Kevin Matocha, Jason P. Campbell, Kuang Sheng
Mobility is a good indicator of device reliability. High channel mobility is one of the biggest challenges especially in novel devices such as high-k based MOSFET, III-V devices and SiC power MOSFET etc. Accurate measurement of channel mobility is required

Multimodal, Nanoscale, Hyperspectral Imaging Demonstrated on Heterostructures of Quantum Dots and DNA-Wrapped Single-Wall Carbon Nanotubes

October 21, 2009
Author(s)
Hyeong G. Kang, Matthew L. Clarke, Jianyong Tang, John T. Woodward IV, Shin G. Chou, Zhenping Zhou, Angela R. Hight Walker, Tinh Nguyen, Jeeseong Hwang
A multimodality imaging technique integrating atomic force, polarized Raman, and fluorescence lifetime microscopy and a 2D autocorrelation image analysis is applied to study the properties of a mesoscopic heterostucture of nanoscale materials. This

Structural Basis of Pathway-Dependent Force Profiles in DNA

October 21, 2009
Author(s)
Daniel R. Roe, Anne M. Chaka
Understanding the mechanical properties that guide the flexibility of DNA is important, as DNA must bend and/or stretch in order to function biologically. In addition, there is interest in using DNA as a nanoscopic length and force standard. Over the past

Towards a Global Interoperability Test Bed for eBusiness Systems

October 21, 2009
Author(s)
Nenad Ivezic, Hyunbo Cho, Jungyub Woo, Jun H. Shin, Jaewook Kim, Mohammad Abidi, Asuman Dogac, Tuncay Namli, Christine Legner, Francois Fischer
We describe an initial effort to create a comprehensive and coherent framework for feasibility analysis of the Global Interoperability Test Bed for eBusiness systems. Requirements from an initial set of three industrial use cases are driving the

Measuring the Utility/Path Diversity Tradeoff in Multipath Protocols

October 20, 2009
Author(s)
Fern Y. Hunt, Vladimir V. Marbukh
We derive a model of congestion control where the trade-off between utility and path diversity can be investigated. In a network where there can be multiple routes between locations, each source is assigned a route according to a random allocation scheme

NIST Handbook 150-18 NVLAP Fasteners and Metals: 2009 Edition

October 20, 2009
Author(s)
Timothy Rasinski
NIST Handbook 150-18 program-specific handbook supplements NIST Handbook 150 by providing additional requirements, guidance, and interpretive information applicable specifically to the fastener and metals laboratory accreditation program (LAP).

Observation of Phase Transitions in Hydrogenated Y Films Via IR Emissivity Imaging

October 20, 2009
Author(s)
Jason Hattrick-Simpers, Ke Wang, Raymond Cao, Chun Chiu, Edwin J. Heilweil, Robert G. Downing, Leonid A. Bendersky
Direct observation of a sequence of phase transitions during hydrogenation of Y thin films has been realized through the use of in-situ isothermal IR emissivity measurements. The formation of different phases, α-Y(H), YH2 and YH3, has been identified based

An Improved Fast I d -V ^d g Measurement Technology With Expanded Application Range

October 19, 2009
Author(s)
Chen Wang, Liangchun (. Yu, Jason P. Campbell, Kin P. Cheung, Yi Xuan, Peide Ye, John S. Suehle, David Zhang
Fast Id-Vg measurements on very high performance devices (very low channel ON-resistance) and larger area devices (therefore large gate capacitance) are subject to serious distortions. Methods to minimize these distortions are introduced in this paper

Effects of sample preparation on bacterial colonization of polymers

October 19, 2009
Author(s)
Diana N. Zeiger, Christopher Stafford, Yajun Cheng, Stefan D. Leigh, Sheng Lin-Gibson, Nancy Lin
Characterization of materials developed for medical usage frequently includes studies in which the materials are inoculated with bacteria in order to assess biofilm formation. Differences in the bacteria are considered to be due to the material alone; the

Interferometry with a photon-number resolving detector

October 19, 2009
Author(s)
Aaron Pearlman, Christoph Wildfeuer, Jun Chen, Jingyun Fan, Alan L. Migdall, Jonathan Dowling
With photon-number resolving detectors, we show compression of interference fringes with in- creasing photon numbers for a Fabry-P erot interferometer. This feature provides a higher precision in determining the position of the interference maxima compared
Displaying 27626 - 27650 of 73697
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