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Displaying 26401 - 26425 of 73929

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

Infiltration of Outdoor Ultrafine Particles into a Test House

August 2, 2010
Author(s)
Dong H. Rim, Lance L. Wallace, Andrew K. Persily
Ultrafine particles (UFP) have been related to adverse human health effects such as respiratory and cardiovascular mortality. However, human exposure to particles of outdoor origin is heavily dependent on their infiltration into homes, where most people

Metadata for Long Term Preservation of Product Data

August 2, 2010
Author(s)
Joshua Lubell
Product data can usefully be defined as structured information about objects which are produced by industrial and business processes. In terms of information types, data formats, usage, and lifespan, product data is both complex and diverse, encompassing

On Feedback Functions of Maximum Length Nonlinear Feedback Shift Registers

August 2, 2010
Author(s)
Cagdas Calik, Meltem Sonmez Turan, Ferruh Ozbudak
Feedback shift registers are basic building blocks for many cryptographic primitives. Due to the insecurities of Linear Feedback Shift Register (LFSR) based systems, the use of Nonlinear Feedback Shift Registers (NFSRs) became more popular. In this work

Production and Characterization of Polymer Microspheres Containing Trace Explosives Using Precision Particle Fabrication Technology

August 2, 2010
Author(s)
Matthew E. Staymates, Robert A. Fletcher, Jessica L. Staymates, John G. Gillen, Cory Berkland
Well characterized test materials are essential for validating the performance of current trace explosive detection systems. These test materials must replicate trace explosive contamination in the form of small particles with characteristic diameters in

Quantum electrical standards

August 2, 2010
Author(s)
Neil M. Zimmerman
The ampere and other electrical units defined by international agreement are presently established through challenging experiments. A redefinition of those units based on quantum laws would enable a simpler and more reliable realization.

Surface Energy/Chemistry Gradients for Block Copolymer Thin Film Studies

August 2, 2010
Author(s)
Julie N. Albert, Michael J. Baney, Christopher Stafford, Jennifer Y. Kelly, Thomas H. Epps
Development of self-assembling block copolymer materials for emerging nanotechnologies requires an understanding of how surface energy and chemistry affect thin film phase behavior. Gradient methods provide an effective route to explore the role of surface

The Role of Folding in the Degradation of Ballistic Fibers

August 2, 2010
Author(s)
Gale A. Holmes, Walter G. McDonough, Jae H. Kim, Derek L. Ho
Failures of certified soft body armor led to a call to understand the underlying mechanisms of the failure. Research has indicated that the folding of ballistic fibers comprising the soft body armor may be a factor in the performance deterioration that has

VISCOSITY MEASUREMENTS ON COLLOIDAL DISPERSIONS (NANOFLUIDS)FOR HEAT TRANSFER APPLICATIONS

August 2, 2010
Author(s)
Mark A. Kedzierski, David Venerus, Jacopo Buongiorno, Rebecca Christianson, Jessica Townsend, In Cheol Bang, Gang Chen, Sung Jae Chung, Minking Chyu, Haisheng Chen, Yulong Ding, F. Dubois, Grzegorz Dzido, Denis Funfschilling, Quentin Galand, Jinwei Gao, Haiping Hong, Mark Horton, Lin-wen Hu, Carlo Iorio, Andrzej Jarzebski, Yiran Jiang, Stephan Kabelac, Chongyoup Kim, Ji Hyun Kim, Sukwon Kim, Thomas McKrell, Rui Ni, John Philip, Naveen Prabhat, Pengxiang Song, Stefan Van Vaerenbergh, Dongsheng Wen, Sanjeeva Witharana, Xiao-Zheng Zhao, Sheng-Qi Zhou
This article reports viscosity data on a series of colloidal dispersions collected as part of the International Nanofluid Property Benchmark Exercise (INPBE). Data are reported for seven different fluids that include dispersions of metal-oxide
Displaying 26401 - 26425 of 73929
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