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Displaying 26176 - 26200 of 73697

Conductive Carbon Nanotubes for Semiconductor Metrology

August 10, 2010
Author(s)
Joseph J. Kopanski, Victor H. Vartanian, Vladimir Mancevski, Phillip D. Rack, Ilona Sitnitsky, Matthew D. Bresin
This paper presents an evaluation of e-beam assisted deposition and welding of conductive carbon nanotube (c-CNT) tips for electrical scanning probe microscope measurements. Variations in CNT tip conductivity and contact resistance during fabrication were

NIST COORDINATION OF SMART GRID INTEROPERABILITY STANDARDS

August 9, 2010
Author(s)
David A. Wollman, Gerald FitzPatrick, Paul A. Boynton, Thomas L. Nelson
The National Institute of Standards and Technology has efforts underway to accelerate the development of interoperability standards to support the future modernized "Smart Grid" electric grid or energy delivery network characterized by a two-way flow of

Performance Requirements for End-to-End Verifiable Elections

August 9, 2010
Author(s)
Stefan Popoveniuc, John M. Kelsey, Andrew Regenscheid, Poorvi Vora
The term end-to-end verifiability has been used over the past several years to describe multiple voting system proposals. The term has, however, never been formally defined. As a result, its meaning tends to change from voting system to voting system. We

Variability in the Geometric Accuracy of Additively Manufactured Test Parts

August 9, 2010
Author(s)
April L. Cooke, Johannes A. Soons
Results of a study on the variability in the geometric accuracy of a metal test part manufactured by several service providers using either electron beam or laser based powder bed thermal fusion processes are described. The part was a circle-diamond-square

Hybridization Thermodynamics of Bound DNA

August 8, 2010
Author(s)
Brian E. Lang
Isothermal Titration Calorimetry was used to study the thermodynamics of hybridization on DNA-functionalized colloidal gold nanoparticles. When compared to the thermodynamics of hybridization of DNA that is free in solution, the differences in the values

Real Space Mapping of Magnetically Quantized Graphene States

August 8, 2010
Author(s)
Joseph A. Stroscio, D. L. Miller, Kevin Kubista, Gregory M. Rutter, Ming Ruan, Walt A. de Heer, Markus Kindermann, Phillip N. First
In a perpendicular magnetic field, the quantized independent-electron states (Landau levels) of graphene are degenerate in the valley degree of freedom and nearly-so in spin. The momentum-space valley degeneracy traces to the equivalence of the A and B

Understanding the Hazards of Grouped Electrical Cables

August 8, 2010
Author(s)
Kevin B. McGrattan, Andrew J. Lock, Nathan D. Marsh, Marc R. Nyden, Jason Dreisbach, David Stroup
CHRISTIFIRE (Cable Heat Release, Ignition, and Spread in Tray Installations during FIRE) is a U.S. Nuclear Regulatory Commission Office of Research program to quantify the mass and energy released from burning electrical cables. This type of quantitative

A Measurement Infrastructure for Sustainable Manufacturing

August 6, 2010
Author(s)
Shaw C. Feng, Che B. Joung
Global resource degradation, climate change, and environmental pollution are worsening due to increasing globalized industrialization. The manufacturing industry has thus been put under pressure to cope with these problems while maintaining competiveness

Coherent spin manipulation in an exchange-only qubit

August 4, 2010
Author(s)
E. A. Laird, Jacob Taylor, David P. DiVincenzo, C. M. Marcus, M. P. Hanson, A. C. Gossard
Initialization, manipulation and measurement of a three-spin qubit are demonstrated using a few- electron triple quantum dot, where all operations can be driven by tuning the exchange interaction. Multiplexed reflectometry, applied to two nearby charge

Carbon nanotube applications to scanning probe microscopy for next generation semiconductor metrology

August 3, 2010
Author(s)
Victor H. Vartanian, Paul McClure, Vladimir Mancevski, Joseph Kopanski, Phillip D. Rack, Ilona Sitnitsky, Matthew D. Bresin, Vincent LaBella, Kathleen Dunn
This paper presents an evaluation of e-beam assisted deposition and welding of conductive carbon nanotube (c-CNT) tips for electrical scanning probe microscope measurements. Variations in CNT tip conductivity and contact resistance during fabrication were

Characterization of gold nanoparticles modified with single-stranded DNA using analytical ultracentrifugation and dynamic light scattering

August 3, 2010
Author(s)
James Falabella, Tae Joon Cho, Dean C. Ripple, Vincent A. Hackley, Michael J. Tarlov
We report the characterization of gold nanoparticles modified with thiol-terminated single stranded DNA using analytical ultracentrifugation and dynamic light scattering. Sedimentation coefficients of nominally 10 and 20 nm diameter gold nanoparticles

A Green Laser Pointer Hazard

August 2, 2010
Author(s)
Jemellie Galang, Alessandro Restelli, Edward W. Hagley, Charles W. Clark
An inexpensive green laser pointer was found to emit 20 mW of infrared radiation during normal use. This is potentially a serious hazard that would not be noticed by most users of such pointers. We find that the problem derives from an unsafe design, and

Facile Chemical Synthesis of Nanocrystalline Thermoelectric Alloys Based on Bi-Sb-Te-Se

August 2, 2010
Author(s)
Anuja Datta, Jagannath Paul, Arik Kar, Amitava Patra, Z. L. Sun, Lidong Chen, Joshua B. Martin, George S. Nolas
High yield syntheses of size confined Bi2Te3, Sb2Te3 and their alloy nanoparticles and nanoflakes were carried out by a facile glycol mediated solvothermal process. Phase purity and good crystalline quality were achieved for all alloy compositions by this

Friction and Wear in Micro and Nanomachines

August 2, 2010
Author(s)
Maarten P. de Boer, Alex D. Corwin, Frank W. DelRio, W R. Ashurst
Friction and wear present both challenges and opportunities for micro- and nanosystems. In the sections that follow, we will describe theoretical underpinnings of multi-asperity friction, micromachined test structures to measure friction, and monolayer
Displaying 26176 - 26200 of 73697
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