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Search Publications

NIST Authors in Bold

Displaying 576 - 600 of 4633

Unifying fast scrambling, thermalization and entanglement through the measurement of FOTOCs in the Dicke model

April 5, 2019
Author(s)
R. J. Lewis-Swan, Arghavan Safavi-Naini, John Bollinger, Ana Maria Rey
… order correlators (FOTOCs), recently measured in a trapped-ion quantum simulator via time reversal of the many-body … quantum optics, recently implemented in atomic and trapped-ion setups. This model describes the coupling of a large spin … correlation, quantum chaos, scrambling, trapped-ion quantum simulator, volume law entanglement …

Chemisorption-Induced Spin Symmetry Breaking In Gold Clusters and the Onset of Paramagnetism in Capped Gold Nanoparticles

January 1, 2006
Author(s)
Carlos A. Gonzalez, Y Simon-Manso, M Marquez, V Mujica
… model to describe the induction of magnetic behavior on gold clusters upon chemisorption of one organic molecule with … and leads to preferential spin density localization on the gold atoms neighboring the chemisorption site. The model is … Chemisorption-Induced Spin Symmetry Breaking In Gold Clusters and the Onset of Paramagnetism in Capped Gold …

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

March 31, 2014
Author(s)
Robert F. Berg
… and validated by comparing it to outgassing measurements. Traps were required to describe the outgassing from a … stainless steel, diffusion, hydrogen outgassing, hydrogen traps, recombination, AISI type 304, AISI type 316, vacuum … Hydrogen traps in the outgassing model of a stainless steel vacuum …

Two-dimensional imaging and modification of nanophotonic resonator modes using a focused ion beam

November 20, 2017
Author(s)
William R. McGehee, Thomas Michels, Vladimir A. Aksyuk, Jabez J. McClelland
… microdisk resonators using a pulsed, low-energy focused ion beam of Li+. The ion beam locally modifies the resonator structure, causing … optical resonances. Images are acquired by rastering the ion beam across the disk surface and extracting the maximum … nanophotonics, focused ion beam, microdisk resonator, imaging …

Magnetic Tunnel Junctions Fabricated Using Ion Neutralization Energy as a Tool

July 25, 2011
Author(s)
Joshua M. Pomeroy, Holger Grube, Pei-Ling Sun, Yun-Che Wang, Russell E. Lake
… degree of freedom in the devices’ fabrication. While most ion species used in common semiconductor processes (like … Highly Charged Ions, Magnetic tunnel junctions, Ion-solid interactions … Magnetic Tunnel Junctions Fabricated Using Ion Neutralization Energy as a Tool …

The Potentials of Helium Ion Microscopy for Semiconductor Process Metrology

February 6, 2008
Author(s)
Michael T. Postek, Andras Vladar
… to monitor and control the manufacturing process. Helium Ion Microscopy (HIM) presents a new approach to process … the helium ions, it is theoretically possible to focus the ion beam into a smaller probe size relative to that of an … voltage and materials involved. Conversely, the helium ion beam interacts with the sample, but it does not have as …

The Helium Ion Microscope: A New Tool for Nanotechnology and Nanomanufacturing

September 1, 2007
Author(s)
Michael T. Postek, Andras Vladar, John A. Kramar, L A. Stern, John Notte, Sean McVey
… Helium Ion Microscopy (HIM) is a new, potentially disruptive … the helium ions, it is theoretically possible to focus the ion beam into a smaller probe size relative to that of an … voltage and materials involved. Conversely, the helium ion beam interacts with the sample, but it does not have as …

Atom-number amplification in a magneto-optical trap via stimulated light forces

January 10, 2012
Author(s)
Elizabeth A. Donley, Tara C. Liebisch, Eric M. Blanshan, John E. Kitching
… and increased the load rate into a small magneto-optical trap by up to a factor of 20. We performed the slowing over … Bichromatic Cooling, Laser Cooling, Magneto-Optical Trap … Atom-number amplification in a magneto-optical trap via stimulated light forces …

Elemental and Molecular Imaging of Human Hair Using Secondary Ion Mass Spectrometry

April 1, 1999
Author(s)
John G. Gillen, S V. Roberson, C M. Ng, M Stranick
… Secondary ion mass spectrometry (SIMS) is used to image the spatial … using a magnetic sector SIMS instrument operated as an ion microprobe. Analysis of electrically insulating, … spatial resolution elemental and molecular secondary ion images to be obtained from hair samples without metallic …

Cold-atom double-lambda coherent population trapping clock

October 31, 2013
Author(s)
Elizabeth A. Donley, Francois-Xavier R. Esnault, Eric M. Blanshan, Eugene N. Ivanov, Robert E. Scholten, John E. Kitching
… Miniature atomic clocks based on coherent population trapping (CPT) states in thermal atoms are emerging as an … Atomic Clocks, Coherent Population Trapping, Doppler Shift … Cold-atom double-lambda coherent population trapping clock …

Reaction of Arylium Ions with the Collision Gas N2 in Electrospray Ionization Mass Spectrometry

January 9, 2015
Author(s)
Yuxue Liang, Pedatsur Neta, Yamil Simon, Stephen E. Stein
… Such peaks were found to be due to reaction of arylium ions with N2 in the collision cell. Therefore, this reaction … m/z values in an Orbitrap Elite instrument. Arylium ions were found to react with N2 in the collision cell. The … by MS3 studies, by comparison with authentic diazonium ions, and by the pressure dependence of the product ion …

Quantum interface between an electrical circuit and a single atom

March 30, 2012
Author(s)
Jacob M. Taylor, Dvir Kafri, David Kielpinski, G J. Milburn, M J. Woolley
… devices using the coupling between the motion of a single ion and the quantised electric field of the circuit. … coupling between the internal states of a single atomic ion and the electrical excitations of a superconducting … Ion traps, superconducting resonator, bulk acoustic waves …

Measuring agglomerate size distribution and dependence of localized surface plasmon resonance absorbance on gold nanoparticle agglomerate size using analytical ultracentrifugation

September 3, 2011
Author(s)
Justin M. Zook, Vinayak Rastogi, Robert I. MacCuspie, Athena M. Keene, Jeffrey A. Fagan
… resonance (LSPR) absorbance spectrum of monodisperse gold NP agglomerates. To characterize the size distribution … gold colloid, aggregate, nanotoxicity, nanoparticle toxicity, … of localized surface plasmon resonance absorbance on gold nanoparticle agglomerate size using analytical …

Using Laser-Cooled Atoms as a Focused Ion Beam Source

December 1, 2006
Author(s)
James L. Hanssen, E Dakin, Jabez J. McClelland, M Jacka
… describe a new method for creating a high quality focused ion beam using laser-cooled neutral atoms in a magneto-optical trap as an ion source. They show that this new technique can provide … that are better than the state of the art in focused ion beams. The source can be used with a range of different …

Assessment of the efficiency of density sucrose gradient centrifugation for the separation of gold nanoparticles by spICP-MS

August 8, 2016
Author(s)
Monique E. Johnson, Antonio R. Montoro Bustos, Michael R. Winchester
… is explored for the purification/separation of three gold nanoparticles (AuNPs) mixtures (Mixture 1: 30 nm, 60 nm, … density sucrose gradient centrifugation, ICP-MS, spICP-MS, gold nanoparticles … sucrose gradient centrifugation for the separation of gold nanoparticles by spICP-MS …

Highly mechanosensitive ion channels from graphene-embedded crown ethers

November 26, 2018
Author(s)
Alta Y. Fang, Kenneth Kroenlein, Demian Riccardi, Alexander Smolyanitsky
… and dissolved metal ions to demonstrate graphene-based ion channels highly sensitive to externally applied lattice … simulations of the effects of tensile lattice strain on ion permeation across graphene-embedded crown ether pores. … Our findings suggest the first instance of solid-state ion channels with an exponential permeation sensitivity to …

Solvent-Dependent Assembly of Terphenyl- and QuaterphenyIdithiol on Gold and Gallium Arsenide

January 12, 2005
Author(s)
D Krapchetov, H Ma, AKY Jen, Daniel A. Fischer, Y-L Loo
… terphenyldithiol (TPDT) and quaterphenyldithiol (QPDT) on gold and gallium arsenide from ethanol (EtOH), … and the average orientation of both TPDT and QPDT on gold are solvent independent. These molecules readily form monolayers on gold with an ensemble-average backbone tilt of 30+/-3 degree …

A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems

August 1, 2006
Author(s)
V Shah, Svenja A. Knappe, P Schwindt, Vladislav Gerginov, John E. Kitching, Leo W. Hollberg
… for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The … coherent population trapping, micromechanical devices, optical pumping … for increasing the amplitude of coherent population trapping resonances in open Lambda systems …

A compact phase delay technique for increasing the amplitude of coherent population trapping resonances in open Lambda systems

August 1, 2006
Author(s)
V Shah, Svenja A. Knappe, P Schwindt, Vladislav Gerginov, John E. Kitching, Leo W. Hollberg
… for increasing the amplitude of coherent population trapping (CPT) resonance in open Lambda systems. The … coherent population trapping, micromechanical devices, optical pumping … for increasing the amplitude of coherent population trapping resonances in open Lambda systems …

Combining secondary ion mass spectrometry image depth profiling and single particle inductively coupled plasma mass spectrometry to investigate the uptake and biodistribution of gold nanoparticles in Caenorhabditis elegans

May 20, 2021
Author(s)
Monique Johnson, Joe Bennett, Antonio Montoro Bustos, Shannon Hanna, Andrei Kolmakov, Nicholas Sharp, Elijah Petersen, Christopher Sims, Bryant Nelson, Patricia Lapasset
… assessments. Here, we combine the use of dynamic secondary ion mass spectrometry (dynamic SIMS) and single particle … to determine the biodistribution and quantity of gold nanoparticles (AuNPs) ingested by Caenorhabditis … Combining secondary ion mass spectrometry image depth profiling and single …

Analytical Validation of Telomerase Activity for Cancer Early Detection: TRAP/PCR-CE and hTERT mRNA Quantification Assay for High-Throughput Screening of Tumor Cells

August 1, 2004
Author(s)
J P. Jakupciak, Wenhua Wang, Peter E. Barker, S Srivastava, Donald H. Atha
… of telomerase activity by current methods such as TRAP/PCR or antibody-based RIA are low throughput and not … analytical validation, we have developed a robot assisted TRAP assay (RApidTRAP) of telomerase, a potential biomarker … Telomerase activity measurements were made using the TRAP/PCR CE method on 50 to 500 cells/reaction isolated from …

Mechanosensitive ion permeation across sub-nanoporous MoS2 monolayers

January 23, 2019
Author(s)
Alta Y. Fang, Kenneth Kroenlein, Alexander Smolyanitsky
… functional theory calculations to investigate aqueous ion transport across subnanoporous monolayer molybdenum … pores that are permeable when unstrained, we demonstrate ion current modulation by a factor of over 20 in the tensile … be a strain-induced reduction of the generally repulsive ion–pore interactions resulting from the ions' short-range …

Quantum Electrodynamics in the Dark

August 1, 2001
Author(s)
John D. Gillaspy
… dielectronic recombination, highly charged ions, ion traps, QED, quantum electrodynamics, strong electric …
Displaying 576 - 600 of 4633
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