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Journals

Pentavalent Uranium Oxide via Reduction of [UO₂]²⁺ Under Hydrothermal Reaction Conditions

May 23, 2008

Author(s)

Nebebech Belai, Mark Frisch, Eugene Ilton, Bruce Ravel, Christopher Cahill

The synthesis, crystal structure and spectroscopic characterization of [UV(H2O)2(UVIO2)2O4(OH)](H2O)4, a mixed-valent UV/UVI oxide material, are reported. The...

Mechanical and electrical coupling at metal-insulator-metal nano-scale contacts

May 22, 2008

Author(s)

Doo-In Kim, Pradeep Namboodiri, Frank W. DelRio, Robert F. Cook

Mechanical and electrical coupling at nano-scale metallic contacts was investigated using a conducting-probe atomic force microscope (AFM). The current-voltage...

Insights into the Characterization of Polymer-Based Organic Thin-Film Transistors Using Capacitance-Voltage Analysis

May 21, 2008

Author(s)

Behrang H. Hamadani, Curt A. Richter, John S. Suehle, David J. Gundlach

Frequency dependent capacitance-voltage characteristics of organic thin-film transistors (OTFTs) based on poly(3-hexylthiophene) (p3HT) as the active polymer...

Cutting Temperature Measurements of Segmented Chips using Dual-Spectrum High-Speed Microvideography

May 20, 2008

Author(s)

Jarred C. Heigel, Robert W. Ivester, Eric P. Whitenton

Dual-Spectrum high speed microvideography involves the use of synchronized high speed visible light (30,000 frames/s) and infrared (600 frames/s) cameras. This...

The NIST Hash Competition

May 20, 2008

Author(s)

William E. Burr

Since the discovery of collision attacks against several well known cryptographic hash functions in 2004 there has been a rush of new cryptanalytic results that...

Interfacial Magnetic Domain Wall Formation in Perpendicular-Anisotropy, Exchange-Spring Films

May 19, 2008

Author(s)

Shannon Watson, T. Hauet, Julie A. Borchers, S Mangin, Eric E. Fullerton

Using magnetometry and polarized neutron reflectometry (PNR), we have mapped the reversal processes of the antiferromagnetically coupled, hard/soft system...

Identification of a Highly-Specific Hydroxyapatite-Binding Peptide Using Phage Display

May 19, 2008

Author(s)

Matthew Becker, Marc Roy, Scott K. Stanley, Eric J. Amis

Using a phage display approach we have identified a peptide sequence SVSVGMKPSPRP that selectively recognizes HA over amorphous calcium phosphate. Exploitation...

Accelerating Scientific Discovery Through Computation and Visualization III. Tight-Binding Wave Functions for Quantum Dots

May 19, 2008

Author(s)

James S. Sims

Research and development of nanotechnology, with applications ranging from smart materials to quantum computation to biolabs on a chip, has a high national...

Quasielastic neutron scattering experiments of orthorhombic ammonia borane

May 16, 2008

Author(s)

Nancy J. Hess, Michael R. Hartman, Craig Brown, Eugene Mamontov, Abhijeet Karkamkar, David J. Heldebrant, Luke Daemen, Tom Autrey

Combinatorial study of the crystallinity boundary in the HfO2-TiO2-Y2O3 system using pulsed laser deposition library thin films

May 16, 2008

Author(s)

Peter K. Schenck, Jennifer L. Klamo, Nabil Bassim, Peter G. Burke, Yvonne B. Gerbig, Martin L. Green

HfO2-TiO2-Y2O3 is an interesting high-k dielectric system. Combinatorial library films of this system enable the study of the role of composition on phase...

Metrology Triangle Using a Watt Balance, a Calculable Capacitor, and a Single- Electron Tunneling Device

May 16, 2008

Author(s)

Mark W. Keller, Francois P. Piquemal, Nicolas Feltin, Barthelemy Steck, Laurent Devoille

The combination of a Watt balance, a calculable capacitor, and a single-electron tunneling device forms a triangle that yields a value for the single-electron...

Quantitation of HER2 and Telomerase Biomarkers in Solid Tumors with IgY Antibodies and Nanocrystal Detection

May 15, 2008

Author(s)

Yan Xiao, X Gao, G Gannot, M Emmert-Buck, S Srivastava, Paul D. Wagner, Michael D. Amos, Peter E. Barker

Finite element analysis of a crack tip in silicate glass: No evidence for a plastic zone

May 15, 2008

Author(s)

Theo Fett, G Rizzi, D Creek, Susanne Wagner, J.P. Guinn, JM Lopez-Cepero, Sheldon M. Wiederhorn

Recently, the claim was made that cracks in silicate glasses propagate by the nucleation, growth, and coalescence of cavities at crack tips, which is the same...

A Passive Heterodyne HEB Imager Operating at 850 GHz

May 15, 2008

Author(s)

Eyal Gerecht, Dazhen Gu, Lixing You, Sigfrid Yngvessen

We report the development and characterization of a passive heterodyne hot electron bolometer (HEB) imager operating at 850 GHz. HEB detectors provide...

Virtual Pervious Concrete: Microstructure, Porosity Percolation, and Permeability Prediction

May 14, 2008

Author(s)

Dale P. Bentz

As the usage of pervious concrete continues to increase dramatically, a better understanding of the linkages between microstructure, transport properties, and...

The Impact of the Dielectric / Semiconductor Interface on Microstructure and Charge Carrier Transport in High-Performance Polythiophene Transistors

May 14, 2008

Author(s)

Youngsuk Jung, Regis J. Kline, Eric K. Lin, Daniel A. Fischer, Michael F. Toney, Martin Heeney, Iain McCulloch, Dean DeLongchamp

The performance of organic field-effect transistors (OFETs) significantly depends on the properties of the interface between the semiconductor and gate...

Measurement of the Concentration of Bacillus Anthracis Spores by DNA Content: Comparison to Plate and Microscope Counts and the Use of Inactivated Materials

May 13, 2008

Author(s)

Jamie L. Almeida, Bruce Harper, Kenneth D. Cole

Reliable measurements of the concentration of Bacillus anthracis (BA) spore suspensions are essential for the production of useful reference materials that can...

The Ability of Actinic Light to Modify the Bacteriorhodopsin Photocycle Revisited: Heterogeneity vs. Photocooperativity

May 13, 2008

Author(s)

R W. Hendler, R I. Shrager, Curtis W. Meuse

In 1995, we reviewed the evidence both for photocooperativity and heterogeneity as possible explanations for the ability of actinic light to modify the kinetics...

Electric field control of the magnetic state in Bi Fe O3 single crystals

May 12, 2008

Author(s)

Seoungsu Lee, William D. Ratcliff, S.-W. Cheong, V. Kiryukhin

Single crystals of multiferroic BiFeO 3 were investigated using neutron scattering. Application of an electric field reversibly switches ferroelastic domains...

How the User can Improve Fingerprint Image Quality

May 12, 2008

Author(s)

Mary F. Theofanos, Ross J. Micheals, Shahram Orandi, Brian C. Stanton, Nien F. Zhang

Traditionally the biometric field has viewed the user as a passive source of the biometric sample rather than an interactive component of the biometric system...

Subspace Approximation of Face Recognition Algorithms: An Empirical Study

May 12, 2008

Author(s)

P J. Phillips, Pranab Mohanty, Sudeep Sarkar, Rangachar Kasturi

We present a theory for constructing linear subspace approximations to face recognition algorithms and empirically demonstrate that a surprisingly diverse set...

Curved–straight neutron guide system with uniform spatial intensity distribution

May 10, 2008

Author(s)

David Mildner, Jeremy Cook

The spatial intensity distribution of neutrons emerging from a curved guide is asymmetric, and straight guide sections are sometimes appended to curved guides...

Ab Initio Studies of the Spin-Transfer Torque in Tunnel Junctions

May 9, 2008

Author(s)

Christian Heiliger, Mark D. Stiles

We calculate the spin-transfer torque in Fe/MgO/Fe tunnel junctions and analyze the results in comparison to all-metallic junctions. We show that the spin...

The relationship between local order, long range order, and sub-bandgap defects in hafnium oxide and hafnium silicate films

May 9, 2008

Author(s)

D. H. Hill, Robert A. Bartynski, Nhan Van Nguyen, Albert Davydov, Deane Chandler-Horowitz, Martin M. Frank

We have measured X-ray absorption spectra (XAS) at the oxygen K-edge for hafnium oxide (HfO2) films grown by chemical vapor deposition (CVD) and atomic layer...

Stability Phase-Fields in the and Pyrochlore Formation in Sections of the Bi₂O₃-Al₂O_3-Nb₂O₅

May 8, 2008

Author(s)

Terrell A. Vanderah, Jorge T. Guzman, Juan C. Nino

Bismuth niobate-based ceramic materials are of interest for embedded elements such as capacitors, resonators, and filters because they exhibit high relative...

Deprotecting Thioacetyl-Terminated Terphenyldithiol for Assembly on Gallium Arsenide

May 8, 2008

Author(s)

D Krapchetov, H Ma, AKY Jen, Daniel A. Fischer, Y-L Loo

We characterize the assembly of terphenyldithiol (TPDT) on gallium arsenide from ethanol (EtOH) and tetrahydrofuran (THF) as a function of ammonium hydroxide...

Investigation of Electron Hole Recombination-Activated Partial Dislocations and Their Behavior in 4H-SiC Epitaxial Layers

May 8, 2008

Author(s)

Yi Chen, Ning Zhang, M Dudley, JOSHUA CALDWELL, Kendrick Liu, ROBERT STAHLBUSH, XIANRONG HUANG, A T. Macrander, David R. Black

Electron hole recombination-activated partial dislocations in 4H silicon carbide homoepitaxial layers and their behavior have been studied using synchrotron X...

Nature and Tunability of Enhanced Hydrogen Binding in Metal−Organic Frameworks with Exposed Transition Metal Sites

May 6, 2008

Author(s)

Wei Zhou, Taner N. Yildirim

Metal−organic framework (MOF) compounds with exposed transition-metal (TM) sites were recently found to exhibit significantly larger experimental heats of...

Directional Routing Protocols for Ad Hoc Networks

May 6, 2008

Author(s)

Hamid Gharavi, Bin Hu

This paper presents a directional routing approach for multihop ad-hoc networks, which has been applied to two on-demand routing protocols: namely Dynamic...

Frequency evaluation of the doubly forbidden ¹S₀–³P₀ transition in bosonic ¹⁷⁴Yb

May 6, 2008

Author(s)

Nicola Poli, Zeb Barber, Nathan D. Lemke, Christopher W. Oates, Tara Fortier, Scott Diddams, Leo W. Hollberg, James C. Bergquist, Anders Brusch, Steven R. Jefferts, Thomas P. Heavner, Tom Parker

We report an uncertainty evaluation of an optical lattice clock based on the 1S 0 – 3P 0 transition in the bosonic isotope 174Yb using magnetically induced...

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