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Journals

Reexamination of the C2H3+ microwave and infrared spectra

September 29, 2011

Author(s)

Jon T. Hougen, Laurent H. Coudert

The high-resolution infrared spectrum of C2H3 recorded in the 3 CH stretching region (J. Phys. Chem. 99 (1995) 15611-15623) is re-analyzed using an effective...

High-Accuracy Photoreceiver Frequency Response Measurements at 1.55 um by Use of a Heterodyne Phase-Locked Loop

September 29, 2011

Author(s)

Tasshi Dennis, Paul D. Hale

We demonstrate a high-accuracy heterodyne measurement system for characterizing the magnitude of the frequency response of high-speed 1.55 µm photoreceivers...

Assessment of the Composition and Distillation Properties of Thermally Stressed RP-1 and RP-2: Application to Fuel Regenerative Cooling

September 28, 2011

Author(s)

Bret Windom, Thomas J. Bruno

In this work, we measured the volatility of thermally stressed samples of RP-1 and RP-2 rocket kerosenes by use of the advanced distillation curve method. This...

Impact of Porous Media Grain Size on the Transport of Multiwalled Carbon Nanotubes

September 28, 2011

Author(s)

Nikolai Mattison, Denis O'Carroll, R. K. Rowe, Elijah Petersen

Nanomaterials possess unique physical, electrical and chemical properties which make them attractive for use in a wide range of applications. Through their use...

The Conformation of Poly(ethylene glycol) Chains in Mono-PEGylated Lysozyme and Mono-PEGylated Human Growth Hormone

September 28, 2011

Author(s)

Sheetal S. Pai, Boualem Hammouda, Kunlun Hong, Danilo.C. Pozzo, Todd M. Przybycien, Robert D. Tilton

Covalent conjugation of poly(ethylene glycol) or "PEGylation" has proven an effective strategy to improvement pharmaceutical protein efficacy. Understanding the...

Magnetic Excitations in the Geometric Frustrated Multiferroic CuCrO₂

September 28, 2011

Author(s)

M. Frontzek, J. T. Haraldsen, A. Podlesnyak, M. Matsuda, A. D. Christianson, R. S. Fishman, A. S. Sefat, Yiming Qiu, John R. Copley, S. Barilo, S. V. Shiryaev, G. Ehlers

In this paper detailed neutron scattering measurements of the magnetic excitation spectrum of CuCrO6d2^ in the ordered state below T N1 = 24.2 K are presented...

Dzyaloshinsky-Moriya Interaction and Long Lifetime of the Spin State in the Cu₃ Triangular Spin Cluster by Inelastic Neutron Scattering Measurements

September 28, 2011

Author(s)

Kazuki Iida, Yiming Qiu, Taku J. Sato

Formation and transfer of GaAsN nanostructure layers

September 27, 2011

Author(s)

Christopher L. Soles, Hyun W. Ro, A. Wood, N. Estrada, B. Dick, Y. Wang, Micheal Thouless, Rachel Goldman

Nanostructured materials with ultra-small crystallites (approaching the exciton Bohr radius) embedded in a solid-state matrix have great potential for...

Prototype cantilevers for quantitative lateral force microscopy

September 27, 2011

Author(s)

Mark Reitsma, Richard S. Gates, Lawrence H. Friedman, Robert F. Cook

Prototype cantilevers that enable quantitative micro- to nano-scale surface force measurements using contact-mode atomic force microscopy (AFM) are presented...

Formation of Kinetically Trapped Nanoscopic Unilamellar Vesicles from Metastable Nanodiscs

September 27, 2011

Author(s)

Mu-Ping Nieh, Paul Dolinar, Norbert Kucerka, Steven R. Kline, Lisa M. Debeer-Schmitt, Kenneth C. Littrell, John Katsaras

Zwitterionic long-chain lipids form onion-like structures, commonly known as multilamellar vesicles (MLVs), in aqueous solution. It is also known that the...

Segmentation and Cell Tracking of Breast Cancer Cells

September 26, 2011

Author(s)

Adele P. Peskin, Daniel J. Hoeppner, Christina H. Stuelten

We describe a new technique to segment and track the cell images of a breast cancer cell line in order to study cell migration and metastasis. Within each image...

Enhanced coupling between light and surface plasmons by nanostructured Fabry-Pérot resonator

September 26, 2011

Author(s)

Brian S. Dennis, Vladimir Aksyuk, Michael Haftel, Stefan T. Koev, Girsh Blumberg

It is recognized that surface plasmons (SPs),which can be present on particulate, smooth, or corrugated metallic surfaces, have enormous potential in the fields...

EXPERIMENTAL STUDY OF PERFORMANCE OF A LOAD-BEARING STEEL STUD GYPSUM BOARD WALL ASSEMBLY EXPOSED TO REAL FIRE

September 25, 2011

Author(s)

Seul-Hyun Park, Samuel Manzello, Matthew Bundy, Tensei Mizukami

The National Institute of Standards and Technology (NIST) and the Center for Better Living (CBL) have formed an international collaboration to assess the...

Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells

September 22, 2011

Author(s)

Matthew R. Hammond, Regis J. Kline, Andrew A. Herzing, Lee J. Richter, David Germack, Hyun W. Ro, Christopher L. Soles, Daniel A. Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M. DeLongchamp

We report quantitative measurements of ordering, molecular orientation, and nanoscale morphology in the active layer of bulk heterojunction organic photovoltaic...

Evaluation of 2-Way Iraqi Arabic-English Speech Translation Systems Using Automated Metrics

September 22, 2011

Author(s)

Gregory A. Sanders, Sherri Condon, Mark Arehart, Dan Parvaz, Christy Doran, John Aberdeen

The Defense Advanced Research Projects (DARPA) Spoken Language Communication and Translation System for Tactical Use (TRANSTAC) program faced many challenges in...

Effective Material Property Extraction Of a Metamaterial by Taking Boundary Effects into Account At TE/TM Polarized Incidence

September 22, 2011

Author(s)

Sung Kim, Christopher L. Holloway, James R. Baker-Jarvis, Edward Kuester, Kendra L. Kimberly

In this paper, we present the extraction for effective material parameters for a metamaterial from TE or TM waveguide measurements with generalized sheet...

SEM Induced Shrinking of Solid State Nanopores for Single Molecule Detection

September 22, 2011

Author(s)

Anmiv Prahbu, Kevin J. Freedman, Joseph W. Robertson, Zhorro Nikolov, John J. Kasianowicz, MinJun Kim

We have investigated the shrinkage of solid state nanopores by a scanning electron microscope and find the process to be reproducible and dependant beam...

Implications of the choice of interatomic potential on planar faults and surface properties in nickel

September 21, 2011

Author(s)

Chandler A. Becker, Francesca M. Tavazza, Lyle E. Levine

With the increasing use of molecular simulation to understand deformation mechanisms in transition metals, it is important to assess how well the simulations...

The Role of Iron Redox State in the Genotoxicity of Ultrafine Superparamagnetic Iron Oxide Nanoparticles

September 21, 2011

Author(s)

Neenu Singh, Gareth J. Jenkins, Bryant C. Nelson, Bryce J. Marquis, Thierry G. Maffeis, Andy P. Brown, Paul M. Williams, Chris J. Wright, Shareen H. Doak

Ultrafine superparamagnetic iron oxide nanoparticles (USPION) hold great potential for revolutionising biomedical applications such as MRI, localised...

The Dynamics of Unfolded Versus Folded tRNA: The Role of Electrostatic Interactions

September 21, 2011

Author(s)

Joon Ho Roh, Madhu Sudan Tyagi, Robert M. Briber, Sarah A. Woodson, Alexei P. Sokolov

We have used quasielastic neutron scattering spectroscopy to study the dynamics of unfolded tRNA under low ionic strength and tRNA folded through the addition...

Hydrogen Dynamics in Ce₂Fe₁₇H₅: Inelastic and Quasielastic Neutron Scattering Studies

September 21, 2011

Author(s)

Alexander V. Skripov, N. V. Mushnikov, P. B. Terent'ev, V. S. Gaviko, Terrence J. Udovic, John J. Rush

The vibrational spectrum of hydrogen and parameters of H jump motion in the rhombohedral Th 2Zn 17d-type compound Ce 2Fe 17H 5 have been studied by means of...

Real-Time Image Composition with Correction of Drift Distortion

September 20, 2011

Author(s)

Petr Cizmar, Andras Vladar, Michael T. Postek

In this article, a new scanning electron microscopy (SEM) image composition technique is de- scribed, which can significantly reduce drift-distortion related...

High Pressure Route to Magnetic Monopole Dimers in Spin Ice

September 20, 2011

Author(s)

H. D. Zhou, S.T. Bramwell, J. G. Cheng, C. R. Wiebe, G. Li, L. Balicas, J. A. Bloxsom, H. J. Silverstein, J. S. Zhou, J. B. Goodenough, Jason S. Gardner

The gas of magnetic monopoles in spin ice is governed by one key parameter: the monopole chemical potential 1,2. A significant variation of this parameter could...

Review of Current Progress in Nanometrology with Helium Ions

September 19, 2011

Author(s)

Michael T. Postek, Andras Vladar, Bin Ming, Charles Archie

Scanning electron microscopy has been employed as an imaging and measurement tool for more than 50 years and it continues as a primary tool in many research and...

Development of the Metrology and Imaging of Cellulose Nanocrystals

September 19, 2011

Author(s)

Michael T. Postek, Andras Vladar, John A. Dagata, Natalia Farkas, Bin Ming, Ryan Wagner, Arvind Raman, Robert J. Moon, Ronald Sabo, Theodore H. Wegner, James Beecher

The development of metrology for nanoparticles is a significant challenge. Cellulose nanocrystals (CNC) are one group of nanoparticles that have high potential...

Calculations of electron stopping powers for 41 elemental solids over the 50 eV to 30 keV range with the full Penn algorithm

September 19, 2011

Author(s)

Cedric J. Powell, David R. Penn, H Shinotsuka, Shigeo Tanuma

We present collision electron stopping powers (SPs) for 41 elemental solids (Li, Be, graphite, diamond, glassy C, Na, Mg, Al, Si, K, Sc, Ti, V, Cr, Fe, Co, Ni...

Reaction Mechanism Governing the Formation of 1,3-bis(diphenylphosphino)propane-protected Gold Nanoclusters

September 19, 2011

Author(s)

Jeffrey W. Hudgens, John M. Pettibone, Thomas P. Senftle, Ryan N. Bratton

This report outlines the determination of a reaction mechanism that can be manipulated to develop directed syntheses of gold monolayer protected clusters (MPCs)...

Efficient quantum dot single photon extraction into an optical fiber using a nanophotonic directional coupler

September 19, 2011

Author(s)

Marcelo I. Davanco, Matthew T. Rakher, W. Wegscheider, Dieter Schuh, Antonio Badolato, Kartik A. Srinivasan

We demonstrate a spectrally broadband and efficient technique for collecting photoluminescence from a single InAs quantum dot directly into a standard single...

Extending Reversed-Flow Chromatographic Methods for the Measurement of Diffusion Coefficients to Higher Temperatures

September 19, 2011

Author(s)

William S. McGivern, Jeffrey A. Manion

A reversed-flow chromatographic apparatus for the measurement of binary diffusion coefficients is described and utilized to measure the binary diffusion...

Reversed-Flow Chromatographic Determination of Binary Diffusion Coefficients

September 19, 2011

Author(s)

William S. McGivern, Jeffrey A. Manion

A reversed-flow chromatographic apparatus for the measurement of binary diffusion coefficients is described. Hydrocarbons are detected using flame ionization...

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