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Search Publications

NIST Authors in Bold

Displaying 1626 - 1650 of 3842

A DNS study of the impact of gravity on spherically expanding laminar premixed flames

September 25, 2023
Author(s)
Lukas Berger, Raik Hesse, Michael Hegetschweiler, Antonio Attili, Konstantin Kleinheinz, Joachim Beeckmann, Gregory T. Linteris, Heinz Pitsch
… performed. A lean methane/air flame and a series of rich hydrogen/air flames diluted with molecular nitrogen are … To assess the e ects of non-unity Lewis numbers in the hydrogen flames, an additional DNS of one hydrogen flame is conducted with unity Lewis numbers for all …

Probing Accelerated Salt-Induced Relaxation Dynamics of Laponite Suspensions Using X-Ray Photon Correlation Spectroscopy Measurements and Molecular Dynamics Simulations

December 22, 2022
Author(s)
Sohaib Mohammed, Meishen Liu, Qingteng Zhang, Suresh Narayanan, Fan Zhang, Greeshma Gadikota
… followed by CsCl and MgCl2 salts. The competing effects of ion size and charge on the relaxation behavior are noted. For … ions shows that higher charge dominates the size of the ion. The trends in the relaxation behavior are consistent … suspensions is accelerated in the presence of salts, with ion sizes and charges having a competing effect on the …

In-Situ Method for Measuring the Mechanical Properties of Nafion Thin Films during Hydration Cycles

August 15, 2015
Author(s)
Kirt A. Page, Jae W. Shin, Scott Eastman, Brandon W. Rowe, Sangcheol Kim, Ahmet Kusoglu, Kevin G. Yager, Gery R. Stafford
… in particular Nafion, are an essential component in hydrogen fuel cells, as both the proton exchange membrane and … within the catalyst layer. During normal operation of a hydrogen fuel cell the ionomer will progressively swell and … cell components to mimic the stress state of a working hydrogen fuel cell. …

Rotational Spectra, Conformational Structures and Dipole Moments of Thiodiglycol by Jet-Cooled FTMW and Ab Initio Calculations

May 1, 2004
Author(s)
L H. Xu, Q Liu, R D. Suenram, Francis J. Lovas, Angela R. Hight Walker, J O. Jensen, A C. Samuels
… points together with the consideration of possible hydrogen bonding in TDG. Three lower energy conformers have … one displays a compact folded-like structure with strong hydrogen bonding between the two hydroxyl groups and the … conformers have relatively open chain-like structures with hydrogen bonding between each of the hydroxyl groups to the …

Improved Limits on Variation of the Fine Structure Constant and Violation of Local Position Invariance

May 29, 2007
Author(s)
Tara M. Fortier, Neil Ashby, James C. Bergquist, Marie Delaney, Scott A. Diddams, Thomas P. Heavner, Leo W. Hollberg, Wayne M. Itano, Steven R. Jefferts, K Kim, Windell Oskay, Thomas E. Parker, Jon H. Shirley, Jason Stalnaker, Filippo Levi, Luca Lorini
We report tests of Local Position Invariance (LPI) and constancy of fundamental constants from measurements of the frequency ratio of the 282-nm 199Hg + optical clock transition to the ground-state hyperfine splitting in 133Cs. Analysis of the frequency

Creation of an Ultracold Neutral Plasma

December 1, 1999
Author(s)
T C. Killian, S Kulin, S D. Bergeson, Luis A. Orozco, C R. Orzel, S L. Rolston
… is evident in the trapping of electrons by the positive ion cloud when the Debye screening length becomes smaller …

Simulation study of the capacitance and charging mechanisms of ionic liquid mixtures near carbon electrodes

January 4, 2019
Author(s)
Alta Y. Fang, Alexander Y. Smolyanitsky
… planar graphene sheets as electrodes. We demonstrate that ion-electrode van der Waals attractions play an important … the two pure ionic liquids. We characterize cumulative ion densities near electrodes carrying various surface … in the ionic liquid mixtures we identify an effective ion exchanging mechanism wherein charging of the electrodes …

Trapped Ions and Laser Cooling, V

February 20, 2002
Author(s)
James C. Bergquist, John J. Bollinger, Wayne M. Itano, David J. Wineland
… Trapped Ions and Laser Cooling, V …

A Mercury-Ion Optical Clock

September 9, 2001
Author(s)
James C. Bergquist, U Tanaka, Robert E. Drullinger, Wayne M. Itano, David J. Wineland, Scott A. Diddams, Leo W. Hollberg, E A. Curtis, Christopher W. Oates, T Udem
… A Mercury-Ion Optical Clock …

Cooling Methods in Ion Traps

January 1, 1995
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, David J. Wineland
… Cooling Methods in Ion Traps …

Quantum Measurements of Trapped Ions

January 1, 1993
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, J M. Gilligan, D J. Heinzen, F L. Moore, M G. Raizen, David J. Wineland
… Quantum Measurements of Trapped Ions …

Quantum Measurements of Trapped Ions

January 1, 1992
Author(s)
Wayne M. Itano, James C. Bergquist, John J. Bollinger, J M. Gilligan, D J. Heinzen, F L. Moore, M G. Raizen, David J. Wineland
… Quantum Measurements of Trapped Ions …

Trapped Ion Frequency Standards

January 1, 1991
Author(s)
David J. Wineland, Wayne M. Itano, James C. Bergquist, John J. Bollinger, D J. Heinzen, C H. Manney, F L. Moore, M G. Raizen, C S. Weimer
… Trapped Ion Frequency Standards …
Displaying 1626 - 1650 of 3842
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