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Journals

Characterizing the Free and Surface-Coupled Vibrations of Heated-Tip Atomic Force Microscope Cantilevers

August 6, 2014

Author(s)

Jason P. Killgore, Ryan C. Tung, Donna C. Hurley

Combining heated-tip atomic force microscopy (HT-AFM) with quantitative methods for determining surface mechanical properties creates an avenue for nanoscale...

IT Pro Conference on Information Systems Governance

August 6, 2014

Author(s)

Irena Bojanova, D. Richard Kuhn

Approximately 100 IT professionals participated in the 2014 IT Pro Conference on Information Systems Governance, held at the National Institute of Standards and...

Enriching 28Si beyond 99.9998 % for semiconductor quantum computing

August 5, 2014

Author(s)

Kevin J. Dwyer, Joshua M. Pomeroy, David S. Simons, June W. Lau, Kristen L. Steffens

Using a laboratory-scale apparatus, we enrich 28Si and produce material with 40 times less residual 29Si than previously reported. Starting from natural...

A Candidate Reference Analytical Method for Quantification of Low Concentrations of Plasmid DNA by Exhaustive Counting of Single DNA Molecules in a Flow Stream

August 4, 2014

Author(s)

Hee-Bong Yoo, Dong-Geun Oh, Jae Yong Song, Mamoru Kawaharasaki, Jeeseong C. Hwang, In Chul Yang, Sang-Ryoul Park

This work demonstrates accurate measurement of the concentration of low-level plasmid DNA by counting individual DNA molecules using a high-sensitivity flow...

Tissue-Engineered Scaffolds for In Vitro Nanoparticle Toxicology

August 3, 2014

Author(s)

Elisabeth Mansfield, Kavita M. Jeerage, Tammy L. Oreskovic, Nikki S. Rentz, Jennifer Recknor

Ignition of Mulch Beds Exposed to Continuous-Wind Driven Firebrand Showers

August 3, 2014

Author(s)

Samuel L. Manzello, Sayaka Suzuki, Koji Kagiya, Junichi Suzuki, Yoshihiko Hayashi

A series of experiments were conducted to examine ignition of mulch beds to continuous, wind-driven firebrand showers. Shredded hardwood mulch, fitted in beds 1...

Fracture Toughness Characterization of High-Pressure Pipe Girth Welds Using Single-Edge Tension SE(T) Specimens

August 1, 2014

Author(s)

Enrico Lucon, Timothy S. Weeks, James Gianetto, W. R. Tyson, D. Y. Park

The safety and reliability of large-diameter pipelines for the transport of fluid hydrocarbons is being improved by the development of high-strength steels...

Comparisons of the radiation protection standards for air kerma of the NIST and the BIPM for Co60 and Cs137 gamma radiation

August 1, 2014

Author(s)

Ronaldo Minniti, C. Kessler, P J. Allisy-Roberts

An indirect comparison of the standards for air kerma of the National Institute of Standards and Technology (NIST), USA, and of the Bureau International des...

In Search of Better Pressure Standards

August 1, 2014

Author(s)

Jay H. Hendricks, Jacob E. Ricker, Patrick F. Egan, Gregory F. Strouse

Based on highly accurate optical interferometry and fundamental quantum calculations, researchers at the National Institute of Standards and Technology (NIST)...

Development of an EUVL collector with infrared radiation suppression

August 1, 2014

Author(s)

Steven E. Grantham, Mike Kriese, Yuriy Platonov, Bodo Ehlers, Licai Jiang, Jim Rodriguez, Mueller Ulrich, Shayna khatri, Adam Magruder, Charles S. Tarrio

Laser-produced plasma (LPP) sources for extreme ultraviolet lithography (EUVL) systems utilize CO2 lasers operating with wavelength 10.6μm. Since multilayer...

Improved measurement capabilities at the NIST EUV Reflectometry Facility

August 1, 2014

Author(s)

Charles S. Tarrio, Steven E. Grantham, Thomas A. Germer, Jack C. Rife, Thomas B. Lucatorto, Mike Kriese, Yuriy Platonov, Licai Jiang, Jim Rodriguez

The NIST Extreme Ultraviolet (EUV) Reflectometry Facility was designed in the 1990s to accommodate the largest multilayer optics envisioned at that time...

Crosstalk Corrections for Coplanar-Waveguide Scattering-Parameter Calibrations

August 1, 2014

Author(s)

Dylan F. Williams, Franz-Josef Schmuckle, Ralf Doerner, Phung N. Gia, Uwe Arz, Wolfgang Heinrich

We study crosstalk and crosstalk corrections in coplanar waveguide vector-network-analyzer calibrations. We show that while crosstalk corrections can improve...

Resolution of Small-Angle Neutron Scattering with a Reflective Focusing Optic

August 1, 2014

Author(s)

David F. Mildner

A small-angle scattering spectrometer that uses a reflective focusing optic can achieve smaller values of the scattering vector, and with higher resolution...

Phase Transitions and Magnetocaloric Effect in Mn₃Cu_0.89Nd0.96^

August 1, 2014

Author(s)

Jun Yan, Ying Sun, Hui Wu, Qingzhen Huang, Cong Wang, Zaixing Shi, Sihao Deng, Kewen Shi, Huiqing Lu, Lihua Chu

We report the large magnetic entropy change observed in the antiperovskite Mn 3Cu 0.89N 0.96. Based in the heat flow peak measured by differential scanning...

Elliptic Curves arising from Brahmagupta Quadrilaterals

August 1, 2014

Author(s)

Farzali Izadi, Foad Khoshnam, Dustin Moody, Arman Zargar

A Brahmagupta quadrilateral is a cyclic quadrilateral whose sides, diagonals, and area are all integer values. In this article, we characterize the notions of...

Nanoscale Imaging and Spectroscopy of Plasmonic Modes with the PTIR technique

August 1, 2014

Author(s)

Aaron M. Katzenmeyer, Jungseok Chae, Richard Kasica, Glenn Holland, Basudev Lahiri, Andrea Centrone

The collective oscillation of conduction electrons in plasmonic nanomaterials allows the coupling of propagating light waves with nanoscale volumes of matter (...

International comparison of measurements of hard magnets with the Vibrating Sample Magnetometer

August 1, 2014

Author(s)

F. Fiorillo, C. Beatrice, D. Son, Franz Josef Ahlers, R. Groessinger, F. Albertini, Y. P. Liu, A Lin, E. Patroi, Robert D. Shull, O. Thomas

We present the results of an international comparison regarding the magnetic properties of hard magnets, measured using the Vibrating Sample Magnetometer. The...

The effect of protein corona composition on the interaction of carbon nanotubes with human blood platelets

July 31, 2014

Author(s)

Silvia H. De Paoli Lacerda, Lukas Diduch, Tseday Tegegn, Martina Orecna, Michael Strader, Elena Karnaukhova, John Bonevich, Abdu Alayash, Karel Holada, Jan Simak

Carbon nanotubes (CNT) are one of the most promising nanomaterials for use in medicine. Applications of CNT in drug/gene delivery, diagnostics and tissue...

Membrane protein resistance of oligo(ethylene oxide) self-assembled monolayers

July 31, 2014

Author(s)

David J. Vanderah, Marlon L. Walker, David T. Gallagher, Ryan Vierling, Fay Crawshaw

Spectroscopic ellipsometry was used to evaluate the resistance to protein adsorption (RPA) of self- assembled monolayers (SAMs) of HS(CH2)3O(CH2CH2O)6M and [HS...

Ultra-Low-Field NMR Relaxation and Diffusion Measurements Using an Optical Magnetometer

July 31, 2014

Author(s)

John E. Kitching, P. Ganssle, H Shin, Scott J. Seltzer, Vikram S. Bajaj, Micah P. Ledbetter, Dimitry Budkerl, Svenja A. Knappe, A Pines

In this work, we have demonstrated for the first time that an alkali vapor cell magnetometer has sufficient sensitivity to chemically resolve a heterogeneous...

Analysis of Deamidation Artifacts Induced by Microwave-Assisted Tryptic Digestion of a Monoclonal Antibody

July 31, 2014

Author(s)

Catherine A. Mouchahoir, Nathanael A. Heckert, Karen W. Phinney

The thorough characterization of biopharmaceuticals is essential for ensuring their quality and safety, since many potential variations can cause changes to a...

Ontology Analysis if Global Gene Expression Differences of Human Bone Marrow Stromal Cells Cultured on 3D Scaffolds or 2D Films

July 31, 2014

Author(s)

Bryan A. Baker, Patrick S. Pine, Kaushik Chatterjee, Girish Kumar, Jennifer H. McDaniel, Marc L. Salit, Carl G. Simon Jr.

Differences in gene expression of human bone marrow stromal cells (hBMSCs) during culture in three-dimensional (3D) nanofiber scaffolds or on two-dimensional...

Polyelectrolyte Multilayers in Microfluidic Systems for Biological Applications

July 31, 2014

Author(s)

Saugandhika S. Minnikanti, Aveek Gangopadhyay, Darwin Reyes-Hernandez

The formation of polyelectrolyte multilayers (PEMs) for the first time two decades ago demonstrating the assembly on charged substrates in a very simple and...

Characterization of Buried Structure in Directed Self Assembly Block Copolymers

July 30, 2014

Author(s)

Daniel F. Sunday, Matthew R. Hammond, Chengqing C. Wang, Wen-Li Wu, Dean M. DeLongchamp, Regis J. Kline, Melia Tjio, Joy Cheng, Jed W. Pitera

The directed self assembly (DSA) of block copolymers (BCP) can multiply or subdivide the pitch of a lithographically defined chemical or topological pattern and...

Introduction to Three Papers on Radio-Propagation Studies Related to Public-Safety Communications

July 30, 2014

Author(s)

Christopher L. Holloway

The National Institute of Standards and Technology (NIST) is involved in a several year effort to understand and address the communication problems that first...

Reversible CO Binding Enables Tunable Co/H₂ and CO/N₂ Separations in Metal-Organic Frameworks with Exposed Divalent Metal Cations

July 30, 2014

Author(s)

Eric D. Bloch, Matthew Ross Hudson, Jarad A. Mason, Sachin Chavan, Valentina Crocella, Joshua D. Howe, Kyuho Lee, Allison L. Dzubak, Wendy L. Queen, Joseph M. Zadrozny, Stephen J. Geier, Li-Chiang Lin, Laura Gagliardi, Berend Smit, Jeffrey B. Neaton, Silvia Bordiga, Craig Brown, Jeffrey R. Long

Resolving three-dimensional shape of sub-50 nm wide lines with nanometer-scale sensitivity using conventional optical microscopes

July 29, 2014

Author(s)

Ravikiran Attota, Ronald G. Dixson

We experimentally demonstrate that the three-dimensional (3-D) shape variations of nanometer-scale objects can be resolved and measured with sub-nanometer scale...

Microfluidic Remote Loading for Rapid Single-Step Liposomal Drug Preparation

July 29, 2014

Author(s)

Wyatt N. Vreeland, Renee R. Hood, Don L. DeVoe

Here we report a microfluidic system that enables rapid and efficient remote loading of amphipathic drugs into nanoscale liposomes, combining liposome synthesis...

Neutron, Electron, and X-ray Scattering Investigation of Cr_1-xV_x Near Quantum Criticality

July 29, 2014

Author(s)

D. A. Sokolov, M. C. Aronson, L. Wu, Y. Zhu, C. Nelson, J. F. Mansfield, K. Sun, Ross Erwin, Jeffrey W. Lynn, M. Lumsden, S. E. Nagler

The weakness of electron-electron correlations in the itinerant antiferromagnet Cr doped with V has long been considered the reason that neither new collective...

Generalized Phase Behavior of Cluster Formation in Colloidal Dispersions with Competing Interactions

July 28, 2014

Author(s)

P. Douglas Godfrin, Nestor E. Valadez-Perez, Ramon Castaneda-Priego, Norman J. Wagner, Yun Liu

Colloidal liquids with short range attraction and long range repulsion, such as proposed for some protein solutions, have been found to exhibit novel states...

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