Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Journals

Gold nanorod separation and characterization by asymmetric-flow field flow fractionation with UV-Vis detection

November 14, 2012

Author(s)

Julien C. Gigault, Tae Joon Cho, Robert I. MacCuspie, Vincent A. Hackley

The application of asymmetrical-flow field flow fractionation (A4F) for gold nanorod (GNR) fractionation and characterization was comprehensively investigated...

Efficient single-spatial-mode periodically-poled KTiOPO4 waveguide source for high-dimensional entanglement-based quantum key distribution

November 14, 2012

Author(s)

Tian Zhong, Franco N. Wong, Alessandro Restelli, Joshua Bienfang

We demonstrate generation of high-purity photon pairs at 1560 nm in a single spatial mode from a periodically-poled KTiOPO4 (PPKTP)waveguide. With nearly...

Chirality-controlled cloning of carbon nanotubes

November 13, 2012

Author(s)

Ming Zheng, Xiaomin X. Tu, Jia Liu, Chuan Wang, Chongwu Zhou

Carbon nanotubes possess superior electrical and optical properties and hold great promise for electronic and biomedical applications1-10. The electronic...

Vibrational modes of GaN nanowires in the gigahertz range

November 13, 2012

Author(s)

Ward L. Johnson, Sudook A. Kim, Roy H. Geiss, Colm Flannery, Kristine A. Bertness, Paul R. Heyliger

Monocrystalline nanowires offer an attractive basis for resonant nanoelectromechanical systems (NEMS) for a variety of applications, including mass and force...

Electrodeposition of Aluminum-Hafnium Alloy from the Lewis Acidic Aluminum Chloride-1-Ethyl-3-methylimidazolium Chloride Molten Salt.

November 13, 2012

Author(s)

Tetsuya Tsuda, Susuma Kuwabata, Gery R. Stafford, Charles Hussey

The electrochemistry of Hf(IV) and the electrodeposition of Al-Hf alloys was examined in the Lewis acidic aluminum chloride-1-ethyl-3-methylimidazolium chloride...

Ultra-low noise regenerative frequency divider

November 11, 2012

Author(s)

Archita Hati, Craig W. Nelson, Corey A. Barnes, Danielle G. Lirette, Jason A. DeSalvo, David A. Howe

We designed ultra-low noise regenerative divider-by-2 circuits that operate at input frequencies of 20 MHz and 10 MHz. We achieved residual output-referred...

Bridging the gap between random microstructure and 3-D meshing

November 10, 2012

Author(s)

Edward Garboczi, Yang Lu

There are different ways of mathematically representing 3-D heterogeneous material structures. But for each of these methods, usually the desired end result is...

Testing the Nations Health care Information Infrastructure

November 10, 2012

Author(s)

Kevin G. Brady, Ram D. Sriram, Bettijoyce B. Lide, Kathleen M. Roberts

According to a report by the Center for Medicare and Medicaid Services [CMS] (http://www.cms.gov), the United States spent nearly $2.6 trillion dollars on...

Electronic structure of Ba-Ga-Ge-Si Type I Clathrates: A Ge and Ga K-Edge Study

November 9, 2012

Author(s)

Winnie Wong-Ng, Azzam Mansour, Joshua Martin, George S. Nolas

XANES spectroscopy was successfully used to study changes in the density of unoccupied states for silicon substituted Ba8Ga16Ge30-xSix type I clathrates...

Next-generation Sequencing: Guidance for the Translation from Research to Clinical Applications

November 8, 2012

Author(s)

Justin M. Zook, Amy Gargis, Lisa Kalman, Ira Lubin

We would like to draw your readers attention to the Next-generation Sequencing: Standardization of Clinical Testing (Nex-StoCT) guidelines, which represent an...

Ambient Low Temperature Plasma Etching of Polymer Films for Virtually Damage-free SIMS Molecular Depth Profiling

November 8, 2012

Author(s)

Shinichiro Muramoto, Timothy M. Brewer, Matthew E. Staymates, John G. Gillen

The feasibility of a low temperature plasma (LTP) probe as a way to prepare polymer bevel cross-sections for secondary ion mass spectrometry (SIMS) applications...

Imaging the Molecular Structure of Polyethylene Blends with Broadband Coherent Raman Microscopy

November 8, 2012

Author(s)

Young J. Lee, Chad R. Snyder, Aaron M. Forster, Marcus T. Cicerone, Wen-Li Wu

Polyethylene (PE) is a ubiquitous material in our daily life appearing as milk bottles, toys and diapers. A lesser-known but increasingly important use of PE is...

Fast Sequential Importance Sampling to Estimate the Graph Reliability Polynomial

November 8, 2012

Author(s)

David G. Harris, Francis Sullivan, Isabel M. Beichl

The reliability polynomial of a graph measures the number of its connected subgraphs of various sizes. Algortihms based on sequential importance sampling (SIS)...

Modeling of Reinforced Concrete Assemblies under a Column Removal Scenario

November 8, 2012

Author(s)

Yihai Bao, Hai S. Lew, Sashi K. Kunnath

This paper presents a computational investigation of two reinforced concrete beam-column assemblies, each comprising three columns and two beams, subjected to...

Determining the Planar Nernst Effect From Magnetic Field Dependent Thermopower and Resistance in Nickel and Permalloy Thin Films

November 8, 2012

Author(s)

Azure Avery, Matthew Pufall, Barry L. Zink

We present magnetic eld dependent measurements of thermopower, α(H), and resistance, R(H), for Ni 80Fe 20 and Ni thin films. We conducted these experiments in...

Observation of the Planar Nernst Effect in Permalloy and Nickel Thin Films with In-Plane Thermal Gradients

November 7, 2012

Author(s)

Matthew R. Pufall, Azure Avery, Barry L. Zink

We present experimental evidence of a transverse thermopower, or planar Nernst effect, in ferromagnetic metal thin films driven by thermal gradients applied in...

Nanoscale Reference Materials for Environmental, Health, and Safety Measurements: Needs, Gaps, and Opportunities

November 7, 2012

Author(s)

Aleksandr B. Stefaniak, Vincent A. Hackley, Gert Roebben, Kensei Ehara, Steve Hankin, Michael T. Postek, Iseult Lynch, Wei-En Fu, Thomas P. Linsinger, Andreas Th?nemann

There is a need to understand and manage potential risks posed to workers, the public, and the environment from exposure to engineered nanomaterials. In...

Structural Association of Nonsteroidal Anti-Inflammatory Drugs with Lipid Membranes

November 7, 2012

Author(s)

Mohan Babu Boggara, Mihaela Mihailescu, Ramanan Krishnamoorti

The location and distribution of ibuprofen, a model nonsteroidal anti-inflammatory drug, in a phospholipid bilayer was examined in molecular detail by a...

Kinetics of Zero Valent Iron Nanoparticle Oxidation in Oxygenated Water

November 6, 2012

Author(s)

Lauren F. Greenlee, Jessica D. Torrey, Justin M. Shaw

Two dimensional spectroscopic imaging of individual ferromagnetic nanostripes

November 6, 2012

Author(s)

Han-Jong H. Chia, Feng Guo, Lyubov Belova, Robert McMichael

We use ferromagnetic resonance force microscopy (FMRFM) to spectroscopically image the edge modes in individual 700 and 400 nm wide Permalloy stripes with a...

Class Numbers via 3-Isogenies and Elliptic Surfaces

November 6, 2012

Author(s)

Cam McLeman, Dustin Moody

We show that a character sum attached to a family of 3-isogenies defi ned on the fibers of a certain elliptic surface over Fp relates to the class number of the...

Dual-channel, single-photon upconversion detector near 1300 nm

November 5, 2012

Author(s)

Paulina S. Kuo, Jason S. Pelc, Oliver T. Slattery, Martin M. Fejer, Xiao Tang

Upconversion of 1.3-micron photons and detection using silicon avalanche photodiodes (Si APDs) can produce high photon detection efficiencies (PDEs) with low...

SPDC Correlated Photon Source Filtered for Narrowed Bandwidth using Volume Bragg Grating

November 5, 2012

Author(s)

Oliver T. Slattery, Paulina Kuo, Yong-Su Kim, Lijun Ma, Xiao Tang

A Volume Bragg Grating (VBG) can be used to efficiently extract a narrow bandwidth, highly collimated beam from an otherwise broad spectrum beam. We use a VBG...

Long Range Internal Stresses in Single-Phase Crystalline Materials

November 2, 2012

Author(s)

Mike Kassner, Peter Geantil, Lyle E. Levine

Backstresses, or long range internal stresses (LRIS), have been suggested by many to exist in plastically deformed crystalline materials. Elevated stresses may...

Solution Conformations of Prototype Foamy Virus Integrase and Its Stable Synaptic Complex with U5 Viral DNA

November 1, 2012

Author(s)

Kushol Gupta, Joseph E. Curtis, Susan N. Krueger, Young Hwang, Peter Cherepanov, Frederic Bushman, Gregory D. Van Duyne

The recently determined crystal structures of prototype foamy virus integrase (PFV IN) in complex with viral DNA and target DNA reveal the first high-resolution...

Towards Data Format Standardization for X-ray Absorption Spectroscopy

November 1, 2012

Author(s)

Bruce Ravel, J. R. Hester, V. A. Sole, M. Newville

A working group on data format standardization for X-ray Absorption Spectroscopy has recently formed under the auspices of International X-ray Absorption...

The Use of Plasmon Spectroscopy and Imaging in a TEM to Probe Physical Properties at the Nanoscale

November 1, 2012

Author(s)

Vladimir P. Oleshko

Valence EELS and energy-filtering TEM appear to be powerful tools to explore diverse nanoscale phenomena because they enable spatially-resolved real-time...

The Need for a Robust, Precise Time and Frequency Alternative to GNSS

November 1, 2012

Author(s)

Michael A. Lombardi, Mitch Narins, Per Enge, Ben Peterson, Sherman Lo, Yu-Hsuan Chen, Dennis Akos

Positioning, Navigation, and Timing (PNT) services are key enablers of both essential safety and security applications and economically beneficial capacity and...

Effect of offset values of solid freeform fabricated PCL/ß-TCP scaffolds on mechanical properties and cellular activities in bone tissue regeneration

November 1, 2012

Author(s)

Carl G. Simon Jr., GeunHyung Kim, MyungGu Yo

Microstructures of biomedical scaffolds can greatly affect cellular activities in tissue regeneration. In particular, scaffolds used in bone tissue regeneration...

East versus West: Organic Contaminant Differences in Brown Pelican (Pelecanus occidentalis) Eggs from South Carolina, USA and the Gulf of California, Mexico

November 1, 2012

Author(s)

Stacy S. Schuur, Daniel W. Anderson, Patrick G. Jodice, Joyce E. Stuckey

Brown pelicans (Pelecanus occidentalis) were listed as endangered in the United States in 1970, largely due to reproductive failure and mortality caused by...

Was this page helpful?