NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

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.

Search Publications

NIST Authors in Bold

Displaying 601 - 625 of 910

Trends in Thermoresponsive Behavior of Lipophilic Polymers

December 1, 2016
Author(s)
Priyanka Bhattacharya, Uma Shantini Ramasamy, Susan T. Krueger, Joshua W. Robinson, Barbara J. Tarasevich, Ashlie Martini, Lelia Cosimbescu
In an effort to look for correlations between viscosity index trends of polymers in oils and size changes of polymers in solution with temperature, the determination of the size of thermo-responsive polymers of various architectures (linear, comb, star

Metastable Layered Cobalt Chalcogenides from Topochemical Deintercalation

November 29, 2016
Author(s)
Xiuquan Zhou, Brandon Wilfong, Hector Vivanco, Johnpierre Paglione, Craig Brown, Efrain E. Rodriguez
We present a general strategy to synthesize metastable layered materials via topochemical de-intercalation of thermodynamically stable to phases.Through kinetic control of the de-intercalation reaction, we have prepared two hypothesized metastable

Effect of Charge on the Mechanical Properties of Surfactant Bilayers

November 23, 2016
Author(s)
Robert David Bradbury, Michihiro Nagao
The viscoelastic properties of surfactant bilayers have been measured over a range of surface charge densities, for a system with a low ionic strength, using small-angle neutron scattering and neutron spin echo (NSE) spectroscopy. An increase in the

ZnTaO 2 N: Stabilized High-Temperature LiNbO 3 -Type Structure

November 18, 2016
Author(s)
Yoshinori Kuno, Cedric Tassel, Koji Fujita, Dmitry Batuk, Artem M. Abakumov, Kazuki Shitara, Akihide Kuwabara, Hiroki Moriwake, Daichi Watabe, Clemens Ritter, Craig Brown, Takafumi Yamamoto, Fumitaka Takeiri, Ryu Abe, Yoji Kobayashi, Katsuhisa Tanaka, Hiroshi Kageyama
By using a high pressure reaction, we prepared a new oxynitride ZnToO 2N that crystallizes in a centrosymmetric (R-3 c)high-temperature LiNbO 3-type structure (HTLN-type). The stabilization of the HTLN-type structure down to low temperatures (at least 20 K

Dynamic Odd-Even Effect in Liquid n-Alkanes Near Their Melting Points

November 1, 2016
Author(s)
Ke Yang, Zhikun Cai, Abhishek Jaiswal, Madhu Sudan Tyagi, Jeffrey S. Moore, Yang Zhang
n-Alkanes are the textbook examples of the odd-even effect. The difference in the packing pattern of odd- and even-numbered n-alkanes results in the odd-even variation of their melting points. In the liquid state, where the packing effects do not hold, it

Supramolecular Self-assembly of a Novel Hydrogelator: Characterization of Fiber Morphology and Formation and Thermal-Reversible Gelation

October 8, 2016
Author(s)
Jack F. Douglas, Yuan Gao Yuan Gao, Ryan C. Nieuwendaal, Emilios Dimitriadis, Boualem Hammouda, Bing Xu, Ferenc Horkay
Hydrogels are of intense recent interest in connection with biomedical applications ranging from 3-D cell cultures and stem cell differentiation to regenerative medicine, controlled drug delivery and tissue engineering. This prototypical form of soft

From Serendipity to Rational Design: Tuning the Blue Trigonal Bipyramidal Mn 3+ Chromophore to Violet and Purple through Application of Chemical Pressure

October 1, 2016
Author(s)
Jun Li, Simon Lorger, Judith K. Stalick, Arthur W. Sleight, M. A. Subramanian
We recently reported that an allowed d-d transition of trigonal bipyramidal (TBP) Mn 3+ is responsible for the bright blue color in the YIn 10xMn xO 3 solid solution. The crystal field splitting between a'(d z2) and e'(d x2'y2, D xy) energy levels is very

A pseudo-3D model to investigate heat and water transport in large area PEM fuel cells - Part 2: Application on an automotive driving cycle

September 14, 2016
Author(s)
Daniel S. Hussey, J-P Poirot-Crouvezier, M. Chandesris, S. Rosini, David L. Jacobson, Jacob M. LaManna, A. Morin, Y. Bultel
In this work, the pseudo-3D multiphysics model introduced in Part 1 of this two-part series of papers is used to investigate heat and water transport in a proton exchange membrane fuel cell designed for an automotive application. The main advantage of the

Lengthscale Effects on Exchange Coupling in Co-Pt Ll 0 +Ll 2 Nanochessboards

September 1, 2016
Author(s)
Eric P. Vetter, Liwei Geng, Priya Ghatwai, Dustin A. Gilbert, Yongmei Jin, William A. Soffa, Jerrold A. Floro
The Co-Pt nanochessboard is a quasi-periodic, nanocomposite tiling of Ll 0 and Ll 2 magnetic phases that offers a novel structure for the investigation of exchange coupling, relevant to permanent magnet applications. Periodicity of the tiling is controlled

The Low-Temperature Structural Behavior of Sodium 1-Carba-closo-decaborate: NaCB 9 H 10

August 21, 2016
Author(s)
Hui Wu, Wan Si NMN Tang, Wei Zhou, Jacob Daniel Tarver, Vitalie Stavila, Craig Brown, Terrence J. Udovic
Two ordered phases of the novel solid superionic conductor sodium 1-carba-closo-decaborate (NaCB 9H 10) were identified via synchrotron x-ray powder diffraction in combination with first-principles calculations and neutron vibrational spectroscopy. A

Structure and Dynamics of Interacting Nanoparticles in Semidilute Polymer Solutions

August 17, 2016
Author(s)
Ryan Poling-Skutvik, Katrina Irene S. Mongcopa, Antonio Faraone, Suresh Narayanan, Jacinta C. Conrad, Ramanan Krishnamoorti
We investigate the structure and dynamics of silica nanoparticles and polymer chains in semidilute solutions of high molecular weight polystyrene in 2-butanone to determine the effect of long range interparticle interactions on the coupling between

Structure of Polyelectrolyte Brushes in the Presence of Multivalent Counterions

August 9, 2016
Author(s)
Jing Yu, Jun Mao, Guangcui Yuan, Sushil K. Satija, Zhang Jiang, Wei Chen, Matthew Tirrell
Polyelectrolyte brushes are of great importance to a wide range of fields, ranging from colloidal stabilization to responsive and tunable materials to lubrication. We synthesized high-density polystyrene sulfonate (PSS) brushes using surface force

A 3He beam stop for minimizing gamma-ray and fast-neutron background

August 6, 2016
Author(s)
Danyal J. Turkoglu, Robert G. Downing, Wangchun Chen, Dagistan Sahin, Jeremy C. Cook
Prompt gamma-ray activation analysis facilities with high neutron currents (≥109 s-1) generate triton-induced fast neutrons from 6Li-loaded collimators and beam stops at rates that soon damage gamma-ray detectors. We develop an alternative beam stop design

Current status and future directions for in situ transmission electron microscopy

August 6, 2016
Author(s)
M. L. Taheri, Eric Stach, Ilke Arslan, Peter A. Crozier, Kabius Bernd, Thomas LaGrange, Andrew Minor, Seiji Takeda, Mihaela M. Tanase, Jakob B. Wagner, Renu Sharma
This review article discusses the current and future possibilities for the application of in situ transmission electron microscopy to reveal synthesis pathways and functional mechanisms in complex and nanoscale materials. The findings of a group of

Crystal Structures and Phase Equilibria in the Hafnium-Palladium System

August 1, 2016
Author(s)
Judith K. Stalick, Richard M. Waterstrat
Portions of the Hf-Pd phase diagram have been reinvestigated in an attempt to resolve contradictions that occur between two previous studies. Techniques employed include Rietveld refinement using x-ray and high-temperature neutron diffraction data to

Precision measurement of the radiative beta decay of the free neutron

June 14, 2016
Author(s)
Jeffrey S. Nico, Kevin J. Coakley, Maynard S. Dewey, Thomas R. Gentile, Hans P. Mumm, Alan Keith Thompson, M J. Bales, R. Alarcon, C. D. Bass, E J. Beise, H Breuer, Jim Byrne, R L. Cooper, B. O'Neill, F E. Wietfeldt, T E. Chupp
The theory of quantum electrodynamics predicts that a continuous spectrum of photons is emitted in the beta decay of the free neutron in addition to a proton, an electron, and an antineutrino. We report the first precision test of the shape of the photon

MPInterfaces: A Materials Project based Python Tool for a High Throughput Computational Screening of Interfacial Systems

May 31, 2016
Author(s)
Arunima Singh, Kiran Mathew, Joshua Grabriel, Kamal Choudhary, Susan B. Sinnott, Albert Davydov, Francesca M. Tavazza, Richard G. Hennig
A Materials Project based open-source python tool, MPInterfaces, has been developed to automate the high throughput computational screening and study of interfacial systems. The framework encompasses creation and manipulation of interface structures for

Applications of Neutron Imaging and Future Possibilities

May 15, 2016
Author(s)
Daniel S. Hussey, David L. Jacobson
Neutron imaging applications exploit the power of neutrons to penetrate through metals and measure small concentrations of hydrogen and lithium with high sensitivity. The recent advances made in digital imaging devices have enabled many novel neutron
Displaying 601 - 625 of 910
Was this page helpful?