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 176 - 200 of 1646

Outlook and Challenges for Hydrogen Storage in Nanoporous Materials

March 1, 2016
Author(s)
D. P. Broom, C. J. Webb, K. E. Hurst, P. A. Parilla, T. Gennett, Craig Brown, R. Zacharia, E. Tylianakis, E. Klontzas, G. E. Froudakis, Th. A. Steriotis, P. N. Trikalitis, D. L. Anton, B. Hardy, D. Tamburello, C. Corgnale, B. A. van Hassel, D. Cossement, R. Chahine, M. Hirscher
… been made recently in the use of Nanoporous materials for hydrogen storage. In this article, the current status of the … of the experimental investigation of real adsorptive hydrogen storage tanks, the improvement of the thermal … hydrogen storage, adsorption, isotherm, structure, …

Infrared emission imaging as a tool for characterization of hydrogen storage materials

December 6, 2008
Author(s)
H. Oguchi, Edwin J. Heilweil, Daniel Josell, Leonid A. Bendersky
… the in-situ hydrogenation of Mg_x}Ni_1-x} films with hydrogen gas; the method is shown to be a powerful … combinatorial screening tool for metal hydrides-base hydrogen storage materials. The 100 nm-thick Mg_x}Ni_1-x} … differences of the metallic and hydride phases. Hydrogen absorption and desorption of the films were …

Hydrogen Field Test Standard Design, Operating Instructions, & Specifications

September 10, 2015
Author(s)
Jodie G. Pope
… and measures inspectors to periodically test retail hydrogen gas dispensers, much as gasoline dispensers are … Flow Facility with helium gas and in the field at a hydrogen dispenser location. This document describes the … safety instrumentation for working with high pressure hydrogen gas, how to execute tests with the FTS, and the …

Hydrogen traps in the outgassing model of a stainless steel vacuum chamber

March 31, 2014
Author(s)
Robert F. Berg
… This article describes a model for hydrogen outgassing into a stainless steel vacuum chamber. It … accounts for the geometry of the chamber components, the hydrogen dissolved in those components, and the processes of … recombination, and trapping. Strongly bound or “trapped” hydrogen, which occurs at heterogeneities such as …

Shear Bond Strength of Bioactive Amorphous Calcium Phosphate Composites

November 1, 2007
Author(s)
Gary E. Schumacher, Joseph M. Antonucci, Justin N. O'Donnell, Drago Skrtic
… Bioactive, amorphous calcium phosphate (ACP)-filled polymeric composites in aqueous … amorphous calcium phosphate, composite, shear bond strength, Dentistry … Shear Bond Strength of Bioactive Amorphous Calcium Phosphate Composites …

Non-rigid and tough calcium phosphate cement scaffold seeded with umbilical cord stem cell for bone repair

August 1, 2013
Author(s)
Carl G. Simon Jr., Hockin H. Xu, Michael D. Weir, WahWah Thein-Han
… study were to develop a novel non-rigid and tough calcium phosphate cement (CPC), and to investigate hUCMSC … CPC scaffold was fabricated using extra tetracalcium phosphate in the CPC powder, chitosan, absorbable fibers and … study developed the first non-rigid, self-setting calcium phosphate-microbead scaffold with a strain-at-failure …

Metal-Assisted Hydrogen Storage on Pt-Decorated Single-Walled Carbon Nanohorns

June 23, 2012
Author(s)
Yun Liu, Craig M. Brown, Dan A. Neumann, David B. Geohegan, Alexander A. Puretzky, Christopher M. Rouleau, Hui Hu, David Styers-Barnett, Pavel O. Krasnov, Boris I. Yakobson
… Current methods to study the spillover effect in hydrogen storage materials typically must compare the results … to determine with confidence the amount of adsorbed hydrogen only associated with spillover. We propose two … pressure gas adsorption experiments to distinguish between hydrogen adsorbed due to physisorption and hydrogen adsorbed …

Microstructure and hydrogen bonding in water-acetonitrile mixtures

November 19, 2010
Author(s)
Raymond D. Mountain
… The connection between hydrogen bonding between water and acetonitrile in … simulated to determine the amount of water-acetonitrile hydrogen bonding. None of the six mixtures were able to reproduce the expermental estimates of hydrogen bonding derived from Raman scattering of the CN …

International Comparison CCQM-K41: Hydrogen Sulfide in Nitrogen

October 16, 2008
Author(s)
Franklin R. Guenther, Walter R. Miller Jr.
… the preparation and value assignment of gas standards for hydrogen sulfide in nitrogen, maintained at the participating … the cylinders could not be prepared gravimetrically as hydrogen sulfide may be absorbed onto the walls of the … laboratory also analyzed a stable reference, a hydrogen sulfide gas mixture that had been shown to be stable …

Reference measurements of Hydrogen's Dielectric Permittivity

August 10, 2009
Author(s)
James W. Schmidt, Michael R. Moldover, Eric F. May
… The measurements determine accurate values of hydrogen's molecular electric polarizability and its … calculated value 1.0×10 -5 K -1 . Our data also determine hydrogen's second dielectric virial coefficient, b ε,H2 = … dielectric constant, dielectric permittivity, helium, hydrogen …

Multifilmamentary Nb 3 Sn wires reacted in hydrogen gas

May 1, 2002
Author(s)
M Takayasu, R G. Ballinger, Ronald B. Goldfarb, A. A. Squitieri, P. J. Lee, David C. Larbalestier
… may be avoided by reacting in a reducing atmosphere of 5% hydrogen-95% argon. The effects of the hydrogen reaction on the superconductive properties of … the bronze wire and by 8% for the internal-tin wire by the hydrogen heat treatment, approximately proportional to the …

Electron Paramagnetic Resonance Study of Carbonated Hydroxyapatite Synthesized through Calcium Phosphate Cements

August 5, 2022
Author(s)
Alline F. Myers, Shozo Takagi, Stanislav Frukhtbeyn, Laurence Chow, Veronika Szalai, Lonnie Cumberland, Ileana Pazos, Eaman Karim
… setting reaction of a self-hardening calcium phosphate cement (CPC) to create carbonate-containing … Calcium phosphate cement, Carbonated hydroxyapatite cement, Electron … dosimetry, Bio-dosimetry, Setting reactions of calcium phosphate cement (CPC) method … of Carbonated Hydroxyapatite Synthesized through Calcium Phosphate Cements …

Ambient-Temperature Hydrogen Storage via Vanadium(II)-Dihydrogen Complexation in a Metal-Organic Framework

April 28, 2021
Author(s)
David Jaramillo, Henry Jiang, Hayden Evans, Romit Chakraborty, Hiroyasu Furukawa, Craig Brown, Martin Head-Gordon, Jeffrey Long
… of materials that strongly and reversibly adsorb hydrogen at ambient temperatures and moderate pressures could … optimal range of −15 to −25 kJ/mol for ambient-temperature hydrogen storage. Here, we report the hydrogen adsorption properties of the metal–organic framework …

Effect of Hydrogen on Pb(Zr,Ti)O 3 -Based Ferroelectric Capacitors

October 1, 1998
Author(s)
S R. Perusse, C W. Tipton, H D. Drew, T Venkatesan, R Ramesh, D B. Romero, V B. Podobedov, A Weber
… ferroelectric films are known to degrade when subjected to hydrogen in forming gas anneals. Earlier studies have … that though oxygen is lost during forming gas annealing, hydrogen incorporation is the primary mechanism for the … [OH-] bonds in the films. The most probable site for hydrogen ions is discussed based on ionic radii, crystal …

Role of microstructure and composition in resisting hydrogen embrittlement of fastener grade steels

July 13, 2009
Author(s)
Nicholas Nanninga, Jack Grochowski, Lloyd Heldt, Karl Rundman
… The degree of hydrogen embrittlement for several fastener grade steels has … determined. The technique used to assess the resistance to hydrogen embrittlement of the steels was the rising step load … alteration resulted in some improvement in resistance to hydrogen embrittlement, the overriding factor contributing to …

Processing and Properties of Strong and Non-Rigid Calcium Phosphate Cement

January 1, 2002
Author(s)
Hockin D. Xu, Janet Quinn, Shozo Takagi, Laurence C. Chow
… A calcium phosphate cement (CPC) sets to hydroxyapatite and has been … calcium phosphate cement, chitosan, hydroxyapatite, non-rigid, … Processing and Properties of Strong and Non-Rigid Calcium Phosphate Cement …

Photoluminescence Quenching in Si 1-x Ge x /Si Multiple Quantum Wells Grown With Atomic Hydrogen

March 1, 1999
Author(s)
Greg Balchin, Paul M. Amirtharaj, C Silvestre, P E. Thompson
… x /Si (0.1 {1-xGe x /Si MQW samples grown without atomic hydrogen. No quantum confined photoluminescence was observed … in the Si 1-x Ge x /Si MQW samples grown with atomic hydrogen. This was unexpected since quantum confined photoluminescence has been observed in the hydrogen-assisted growth of Si 1-x Ge x /Si quantum-well …

In-situ Kinetics Studies on Hydrogenation of Transition Metal (=Ti, Fe) Doped Mg Films

March 1, 2010
Author(s)
Zhuopeng Tan, Edwin J. Heilweil, Leonid A. Bendersky
… Ti and Fe additives on Mg hydride growth rates. Compare to hydrogenation of pure Mg, Ti additives (atomic fraction 1.6 % … a thicker hydride layer residing on top of the films. Mg Hydrogenation rate is increased by an order of magnitude for … layer is thicker than twice of the hydride layer in hydrogenation of pure Mg case. Results obtained here can be …
Displaying 176 - 200 of 1646
Was this page helpful?