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 101 - 125 of 2768

Reinforcement of a Self-Setting Calcium Phosphate Cement with Different Fibers

October 1, 2000
Author(s)
Hockin D. Xu, F Eichmiller, Anthony A. Giuseppetti
… A water-based calcium phosphate cement (CPC) has been used in a number of medical … to fiber strength. In conclusion, a self-setting calcium phosphate cement was substantially strengthened via fiber … calcium phosphate cement, fiber reinforcement, fiber strength, …

Neutron Depth Profiling Technique for Studying Aging in Li-ion Batteries

February 15, 2011
Author(s)
Robert G. Downing
… During operation of a Li-ion cell, lithium diffuses in and out of the solid phase … Lithium, battery, neutron depth profiling, aging, Li-ion cell, C-rate … Neutron Depth Profiling Technique for Studying Aging in Li-ion Batteries …

Towards a quantum repeater using a surface-trap-integrated microcavity and trapped ions

November 18, 2025
Author(s)
Lindsay Sonderhouse, Margaret Bruff, Kaitlyn David, Daniel Slichter, Dietrich Leibfried
… Trapped ions are a leading candidate for the "stationary qubits" of a … quantum repeater, trapped ions, optical cavity, quantum networking, surface electrode … using a surface-trap-integrated microcavity and trapped ions … using a surface-trap-integrated microcavity and trapped ions …

Adsorption From Solutions on Synthetic Hydroxyapatite: Nonaqueous Versus Aqueous Solvents

July 1, 1999
Author(s)
D N. Misra
… of solutes from aqueous solutions generally involves ion-exchange with the apatite surface, and may be affected by … surface complex or by chemically reacting with calcium or phosphate ions to form a new phase that precipitates out of solution. Therefore, the concentration of calcium and phosphate ions in solution should also be monitored to …

Ion-Molecule Reactions and Ion Kinetics in DC Townsend Discharges in Dielectric Gases

January 1, 1999
Author(s)
MVVS. Rao, James K. Olthoff
… and kinetic energies of ions are determined by ion-molecule collisions experienced by ions as they are … as charge-exchange collisions, collisional detachment, and ion conversion, we have measured the kinetic-energy … measurements, and the effective cross sections for the ion-molecule reactions, in some cases, may be calculated. The …

Direct Imaging of Static and Dynamic Ion Cloud Distributions in an Electron Beam Ion Trap

February 1, 2000
Author(s)
James V. Porto
… directly image highly charged ions within an electron beam ion trap (EBIT). Using an intensified CCD camera, we have the capability to measure both static and dynamic ion cloud distributions. The technique provides information … by other methods. Static images can be used to determine ion temperatures and the degree of overlap between the …

Thermodynamics of the Hydrolysis Reactions of Adenosine 3', 5'-(Cyclic)phosphate(aq) and Phosphoenolpyruvate(aq); the Standard Molar Formation Properties of 3',5'-(Cyclic)Phosphate(aq) and Phosphoenolpyruvate(aq)

November 1, 2003
Author(s)
Robert N. Goldberg, Yadu D. Tewari
… were catalyzed, respectively, by adenosine 3',5'-(cyclic)phosphate and by alkaline phosphatase. The results were … = ADP(aq) + PEP(aq)}, and {ATP(aq) + pyruvate(aq) + phosphate(aq) = AMP(aq) + PEP(aq) + pyrophosphate(aq)} were … adenosine 3', 5'-cyclic)phosphate, Alkaline phosphatase, calorimetry, chemical …

Charge States of y Ions in the Collision-Induced Dissociation of Doubly Charged Tryptic Peptide Ions

February 25, 2011
Author(s)
Pedatsur Neta, Stephen E. Stein
… relative intensities of charge states of product y- and b-ions depend on the final location of that proton. This study … distributions for dissociation of doubly charged peptide ions, using a large reference library of peptide ion fragmentation generated from ion-trap CID of peptide ions from tryptic digests. Trends in relative intensities of …

A Miniature EBIT with Ion Extraction for Isolating Highly Charged Ions

May 28, 2015
Author(s)
Shannon Hoogerheide, Joseph Tan
… development of a room-temperature miniature electron beam ion trap (EBIT) for efficient production of charge states … and electric potential necessary for the production of ions in the EBIT. In addition to radial access for in-EBIT … select a single charge state to be isolated in a secondary ion trap for further study. One goal is the production of …

Estimation of the critical external heat leading to the failure of lithium-ion batteries

June 29, 2020
Author(s)
Wei Tang, Andy Tam, Liming Yuan, Thomas Dubaniewicz, Richard Thomas, John Soles
… critical external heat leading to the failure of lithium-ion (Li-ion) batteries was conducted using an Accelerating Rate … Safety and Health (NIOSH). Several types of commercial Li-ion batteries were selected, including iron phosphate Li-ion … Lithium-ion battery, Accelerating Rate Calorimetry, Heat to failure, …

Premixed Rapid-Setting Calcium Phosphate Composites for Bone Repair

January 1, 2005
Author(s)
Lisa E. Carey, Hockin D. Xu, Carl Simon Jr., Shozo Takagi, Laurence C. Chow
… Spell out acronyms on first reference.) Although calcium phosphate cement (CPC) is promising for bone repair, its … Three premixed CPCs were thus developed: CPC-monocalcium phosphate monohydrate (MCPM), CPC-chitosan, and CPC-tartaric. … culture, cytotoxicity, hydroxyapatite, premixed calcium phosphate cement, rapid setting, strength, Dentistry …

The Mobilities of NO + (CH 3 CN)n Cluster Ions (n=0-3) Drifting in helium-Acetonitrile Mixtures

December 1, 1996
Author(s)
J A. de Gouw, L N. Ding, M Krishnamurthy, H S. Lee, E B. Anthony, V M. Bierbaum, S R. Leone
… The mobilities of NO+(CH 3 CN) n cluster ions (N=0-3) drifting in helium and in mixtures of helium and … of the geometric cross sections of the different cluster ions. The rate constants for the various cluster formation … 2 and NO + (CH 3 CN) 3 , the drift velocities for these ions are found to be strongly dependent on the acetonitrile …

Scanning Ion Microscopy with Low Energy Lithium Ions

July 1, 2014
Author(s)
Kevin A. Twedt, Lei Chen, Jabez J. McClelland
… Using an ion source based on photoionization of laser-cooled lithium atoms, we have developed a scanning ion microscope with probe sizes of a few tens of nanometers … in ion microscopy when detecting backscattered ions, due to a decreased interaction volume and the potential …

X-Ray Spectroscopy of Trapped Ions With a Microcalorimeter on the NIST Electron Beam Ion Trap

December 1, 2002
Author(s)
E Takacs, John D. Gillaspy, L P. Ratliff, K Makonyi, J M. Laming, E Silver, H. Schnopper, M Barbera, J. Beeman, E. E. Haller, N. Madden
… The electron beam ion trap (EBIT) was invented about 15 years ago. Judging from … and study the structure and interactions of highly charged ions. Today, EBITs exist in several different laboratories … in a variety of fields of research where multiply charged ions relevant. Recent astrophysical missions by NASA and …

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 …

Performance of a C 60 + Ion Source on a Dynamic SIMS Instrument

July 1, 2006
Author(s)
Albert J. Fahey, John G. Gillen, P Chi, Christine M. Mahoney
… An IonOptika [1] C60+ ion source has been fitted onto a CAMECA [1] ims-4f. Stable ion beams of C60+ and C602+ have been obtained with typical … able to be focussed into a spot size of ~1 ?m and scanning ion images acquired. We have performed analyses to … Buckministerfullerene, cluster ion beams, ion source, SIMS ion source …

Cell Adhesion to Borate Glasses by Colloidal Probe Microscopy

August 1, 2011
Author(s)
Sheldon M. Wiederhorn, Carl G. Simon Jr., Young-Hun Chae
… force of adhesion depended on the formation of a calcium phosphate reaction layer on the glass surface caused by … in the medium. Those glasses that did not form a calcium phosphate layer on the glass surface exhibited a weaker force … adhesion relative to those glasses that formed a calcium phosphate layer on their surfaces. The experiments described …

Noninvasive monitoring of ion current and ion energy during plasma processing

July 15, 2008
Author(s)
Mark A. Sobolewski
… technique has been developed for noninvasive monitoring of ion energy and ion current in plasma reactors. The technique relies on … electrical waveforms, the technique determines the total ion current, the plasma potential and sheath voltage … ion current, ion energy, electrical measurements, inductively …

Cold atomic beam ion source for focused ion beam applications

July 23, 2013
Author(s)
Brenton J. Knuffman, Adam V. Steele, Jabez J. McClelland
… We report measurements and modeling performed on an ion source based on ionization of a laser-cooled atomic beam. … for use in next-generation, high-resolution focused ion beam (FIB) systems. Our measurements of total ion current as a function of ionization conditions support a …
Displaying 101 - 125 of 2768
Was this page helpful?