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Displaying 876 - 900 of 4633

Focused Ion Beam-Induced Displacive Phase Transformation From Austenite to Martensite during Fabrication of Quenched and Partitioned Steel Micro-Pillar

January 5, 2020
Author(s)
Eun Jung Seo, Lawrence Cho, Jin Kyung Kim, Javad Mola, Lijia Zhao, Sukjin Lee, Bruno C. De Cooman
… and partitioned steel micro-pillars by using focused ion beam (FIB) technique. The BCC phase produced by the FIB … immediately after a FIB scan of the surface with the Ga+ ion beam. This report addresses challenges related to the … retained austenite, martensitic transformation, focused ion beam. …

Hydrodynamic Excitations for a Trapped Fermi Gas

December 1, 1999
Author(s)
G M. Bruun, Charles W. Clark
… We discuss collective excitations of a trapped dilute Fermi gas within a hydrodynamic approximation. … spectrum. Some of our results are relevant to the case of trapped bosons as well. Our analysis suggests several … Hydrodynamic Excitations for a Trapped Fermi Gas …

Grating magneto-optical traps with complicated level structures

October 25, 2023
Author(s)
Daniel Barker, Peter Elgee, Ananya Sitaram, Eric Norrgard, Nikolai Klimov, Gretchen K. Campbell, Stephen Eckel
… forces and optical pumping within grating magneto-optical traps (MOTs) operating on transitions with non-trivial level … will aid the development of fieldable atom and molecule traps for time keeping, inertial navigation, and precision … Grating magneto-optical traps with complicated level structures …

High Throughput Measurement of Peel of a Pressure Sensitive Adhesive

January 1, 2006
Author(s)
P M. McGuiggan, James J. Filliben
The peel force of a pressure sensitive adhesive (PSA) tape is measured on a surface that varied linearly in temperature. As the tape is peeled from the surface, the adhesive is peeled from a surface at a different temperature. The temperature can be

Cluster Primary Ion Beam Secondary Ion Mass Spectrometry for Semiconductor Characterization

January 1, 2001
Author(s)
John G. Gillen, S V. Roberson, Albert J. Fahey, Marlon L. Walker, J Bennett, R Lareau
… We are evaluating the use of polyatomic and cluster primary ion beams for characterization of semiconductor materials by secondary ion mass spectrometry using both magnetic sector and time-of-flight SIMS instruments. Primary ion beams of SF 5 +, C 8 - and CsC 6 - have been used to …

The Negative Bias Temperature Instability vs. High-Field Stress Paradigm

May 18, 2009
Author(s)
Jason P. Campbell, Kin P. Cheung, John S. Suehle, A Oates
A new and more accurate fast-IDVG measurement methodology is utilized to examine the transient degradation and recovery associated with the negative-bias temperature instability (NBTI). The results reveal that the anomalously large initial degradations

Rethinking Charge trapping and detrapping dynamic without the sheet-charge approximation

December 5, 2016
Author(s)
Kin (Charles) Cheung, Jason Campbell, Dmitry Veksler
… Charge-trapping/detrapping are common occurrences that affect MOSFET … phenomena, we need to think through the dynamic of charge-trapping/detrapping. The standard approach to treat oxide … picture completely dominated all discussions of charge- trapping in the literature. Physically, the trapped charge's …

Laser Cooling Without Repumping: A Magneto-Optical Trap for Erbium Atoms

April 14, 2006
Author(s)
Jabez J. McClelland, James L. Hanssen
… This mechanism is observed in a magneto-optical trap for erbium, an atom with a very complex energy level … for optical pumping losses. We observe surprisingly high trap populations of over 10 6 atoms and densities of over 10 … state atoms held in the quadrupole magnetic field of the trap explains the high trap population, and agrees well with …

Revisiting the Photon-Drag Effect in Metal Films

August 2, 2019
Author(s)
Jared H. Strait, Glenn E. Holland, Wenqi Zhu, Cheng Zhang, Bojan R. Ilic, Amit K. Agrawal, Domenico Pacifici, Henri J. Lezec
… underlying radiation pressure. We revisit this effect in gold, a canonical Drude metal. We discover that the signal … light-matter interaction, gold, photon drag, radiation pressure …

Confinement of an alkaline-earth element in a grating magneto-optical trap

October 15, 2020
Author(s)
Ananya Sitaram, Peter Elgee, Gretchen K. Campbell, Daniel Barker, Nikolai Klimov, Stephen Eckel
… We demonstrate a compact magneto-optical trap (MOT) of alkaline-earth atoms using a nanofabricated … atoms, at a temperature of approximately 6 mK, and with a trap lifetime of approximately 1 s. Our results will aid the … of an alkaline-earth element in a grating magneto-optical trap …

Using Self-Assembly to Control the Structure of DNA Monolayers on Gold: A Neutron Reflectivity Study

September 30, 1998
Author(s)
R Levicky, T M. Herne, Michael J. Tarlov, Sushil K. Satija
… the concentration profiles of oligomeric DNA monolayers on gold in the high salt (1M NaCl). These monolayers are of … adsorbed layers of single-stranded DNA (HS-ssDNA) on bare gold are compact, suggesting the presence of multiple … to Control the Structure of DNA Monolayers on Gold: A Neutron Reflectivity Study …

Discriminative potential of ion mobility spectrometry for the detection of fentanyl and fentanyl analogues relative to confounding environmental interferents

September 27, 2019
Author(s)
Thomas Forbes, Jeffrey Lawrence, Jennifer R. Verkouteren, R. Michael Verkouteren
… discriminative potential, sensitivity and specificity, of ion mobility spectrometry (IMS) for the detection of fentanyl … in desorption and drift tube temperatures, reactant ion dopant chemistry, and analysis time. This work identified … Ion mobility spectrometry, Illicit narcotics, Fentanyl, …

On the Risk of False Positive Identification Using Multiple Ion Monitoring in Qualitative Mass Spectrometry: Large-Scale Intercomparisons With a Comprehensive Mass Spectral Library

June 1, 2006
Author(s)
Stephen E. Stein, David N. Heller
… out by comparing a few selected ions acquired by multiple ion monitoring (MIM), with due allowance for expected … roughly one order of magnitude for each additional ion selected. Our computations also showed that false … identification, mass spectral library, multiple ion monitoring (MIM), qualitative mass spectrometry …

A Critical Compilation of Experimental Data on the 1s2l2l0 Core-Excited States of Li-like Ions from Carbon to Uranium

October 7, 2022
Author(s)
Yuri Ralchenko, Alexander Kramida, Vladimir Azarov
… of energy levels of the 1s2l2l0 core-excited states for ions along the Li isoelectronic sequence from carbon to … levels of the 1s2l2l0 core-excited states of Li-like ions. The compiled experimental data include uncertainty … Spectroscopy, Energy Levels, Transition Energies, Li-like ions, Critical Compilation, Core-Excited States …

A Critical Compilation of Experimental Data on the 1s2l2l0 Core-Excited States of Li-like Ions from Carbon to Uranium

May 25, 2022
Author(s)
V. I. Azarov, Alexander Kramida, Yuri Ralchenko
… of energy levels of the 1s2l2l' core-excited states for ions along the Li isoelectronic sequence from carbon to … levels of the 1s2l2l' core-excited states of Li-like ions. The compiled experimental data include uncertainty … Spectroscopy, Energy Levels, Transition Energies, Li-like ions, Critical Compilation, Core-Excited States …

Solvation Structure of Ions in Water

February 14, 2007
Author(s)
Raymond D. Mountain
… Molecular dynamics simulations of ions in water are reported for solutionsof varying solute … trends inproperties as the size and charge density of the ions changes.The emphasis is on how the structure of water is modified by the presenceof the ions and how many water molecules are present in the first …

Valence Electron Orbitals of an Oligo(p-phenylene-ethynylene)thiol on Gold

March 1, 2004
Author(s)
Christopher D. Zangmeister, Steven W. Robey, Roger D. van Zee, Yuxing Yao, J M. Tour
… oligo(para-phenylene-ethynylene) thiolate chemisorbed on gold surfaces. Within 5 eV of the Fermi level, four states … Orbitals of an Oligo(p-phenylene-ethynylene)thiol on Gold …
Displaying 876 - 900 of 4633
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