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Displaying 25426 - 25450 of 74221

Quamtum coherence between two atoms beyond Q=10 15

April 22, 2011
Author(s)
Chin-Wen Chou, David Hume, Michael J. Thorpe, David J. Wineland, Till P. Rosenband
We place two atoms in quantum superposition states and observe coherent phase evolution for 3.4 × 10 15 cycles. Correlation signals from the two atoms yield information about their relative phase even after the probe radiation has decohered. This technique

Recommendations for Terminology and Databases for Biochemical Thermodynamics

April 22, 2011
Author(s)
R Alberty, A. Bowden-Cornish, Robert N. Goldberg, G.G Hammes, K. Tipton, H.V. Westerhoff
Although chemical equations are normally written in terms of specific ionic and elemental species and balance atoms of elements and electric charge, it is usually better in a biochemical context to write them with ionic reactants expressed as totals of

Carbon Capture in Metal-Organic Frameworks - A Comparative Study

April 21, 2011
Author(s)
Jason M. Simmons, Hui Wu, Wei Zhou, Taner Yildirim
Metal organic frameworks (MOFs) have been shown to be excellent materials for storage of carbon dioxide, implying that they could be useful for removal of carbon dioxide from flue gas stacks, however their performance in industrial relevant swing

Chiral Rashba Spin Textures in Ultra-Cold Fermi Gases

April 21, 2011
Author(s)
Ian B. Spielman, Jay Sau, Rajdeep Sensarma, Stephen Powell, Sankar Das Sarma
Spin-orbit coupling is an important ingredient in many recently discovered phenomena such as the spin-Hall effect and topological insulators. Of particular interest is topological superconductivity, with its potential application in topological quantum

Small-sized dichroic atomic vapor laser lock

April 21, 2011
Author(s)
Svenja A. Knappe, Changmin Lee, Geoffrey Z. Iwata, Eric Corsini, James M. Higbie, Micah P. Ledbetter, Dimitry Budkerl
Two, lightweight diode laser frequency stabilization systems designed for experiments in the field are described. Similar to a previous design, magnetic-field lines are contained within a magnetic shield enclosing permanent magnets and Rb cells, so that this

Spatial separation in a thermal mixture of ultracold174Yb and 87Rb atoms

April 21, 2011
Author(s)
F. Baumer, F. Munchow, A. Gorlitz, Stephen Maxwell, Paul S. Julienne, Eite Tiesinga
We report on the observation of unusually strong interactions in a thermal mixture of ultracold atoms which cause a significant modification of the spatial distribution. A mixture of 87Rb and 174Yb with a temperature of a few μK is prepared in a hybrid

Optical illumination optimization for patterned defect inspection

April 20, 2011
Author(s)
Bryan M. Barnes, Richard Quintanilha, Martin Y. Sohn, Hui Zhou, Richard M. Silver
Rapidly decreasing critical dimensions (CD) for semiconductor devices drive the study of improved methods for the detection of defects within patterned areas. As reduced CDs are being achieved through directional patterning, additional constraints and

Stable Single-Crystalline Body Centered Cubic Fe Nanoparticles

April 20, 2011
Author(s)
Natalie F. Huls, Lise-Marie Lacroix, Don Ho, Xiaolian Sun, Shouheng Sun
Air stable magnetic nanoparticles (MNPs) with high magnetization are required in order to fully realize optimized biomedical agents. However, only metallic NPs with good crystallinity such as Fe or FeCo, exhibit magnetization as high as 220 A.m.kg. Their

Strain-Based Temperature Memory Effect for Nafion(R) and Its Molecular Origins

April 20, 2011
Author(s)
Kirt A. Page, Scott Eastman, Tao Xie
A shape memory polymer traditionally refers to a polymer that can memorize one temporary shape and recover to its permanent shape upon exposure to an external stimulus. Although this basic concept has been known for at least half a century, recent advances

Landau Levels and Band Bending in Few-Layer Epitaxial Graphene

April 18, 2011
Author(s)
Hongki Min, Shaffique Adam, Young J. Song, Joseph A. Stroscio, Mark D. Stiles, Allan H. MacDonald
The carrier density distributions in few-layer-graphene systems grown on the carbon face of silicon carbide can be radically altered by the presence of a Scanning Tunneling Microscope (STM) tip used to probe top-layer electronic properties, and by a

Nested Uncertainties and Hybrid Metrology to Improve Measurement Accuracy

April 18, 2011
Author(s)
Richard M. Silver, Nien F. Zhang, Bryan M. Barnes, Hui Zhou, Jing Qin, Ronald G. Dixson
In this paper we present a method to combine measurement techniques that reduce uncertainties and improve measurement throughput. The approach has immediate utility when performing model-based optical critical dimension measurements. When modeling optical

TSOM Method for Semiconductor Metrology

April 18, 2011
Author(s)
Ravikiran Attota, Ronald G. Dixson, John A. Kramar, James E. Potzick, Andras Vladar, Benjamin D. Bunday, Erik Novak, Andrew C. Rudack
Through-focus scanning optical microscopy (TSOM) is a new metrology method that achieves 3D nanoscale measurement resolution using conventional optical microscopes; measurement sensitivities are comparable to what is typical using Scatterometry, SEM and

Short-Range Ordering in the Modified Honeycomb Lattice Compound SrHo 2 O 4

April 17, 2011
Author(s)
S Ghosh, H. D. Zhou, L. Balicas, Jason S. Gardner, Yiming Qiu, C. R. Wiebe
The low temperature behaviour of single crystalline SrHo 2O 4 has been characterized by DC mag- netic susceptibility, heat capacity, and neutron scattering experiments. Our results show that despite the lack of magnetic long-ranged ordering in the presence

Slow and static spin correlations in Dy 2+h Ti 2-hO d7-d

April 17, 2011
Author(s)
Jason S. Gardner, G. Ehlers, P. Fouquet, B. Farago, J. R. Stewart
The static and dynamic spin correlations in the spin-ices Dy 2.3Ti 1.7O 6.85 and Dy 2Ti 2O 7 have been studied in polarised neutron diffraction and neutron spin echo experiments. The measurements reveal that, below 100 mK, the magnetic scattering broadens

Development of Probe Free Mapping of Cell Viability in Hydrogels

April 16, 2011
Author(s)
Joy P. Dunkers, Kaushik Chatterjee, Carl G. Simon Jr.
Diffusion of oxygen in cell/scaffold construct interior is of critical importance to cell viability in constructs of clinically relevant sizes. It has been shown that depletion of oxygen within the scaffold leads to a decrease in cell density and viability
Displaying 25426 - 25450 of 74221
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