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Displaying 776 - 800 of 4633

Energy Levels of 4f3 in the Free Nd3+ Ion From Emission Spectra

February 1, 2006
Author(s)
J-F Wyart, Ali Meftah, Annik Bachelier, Jocelyne Sinzelle, Wan-U Lydia Tchang-Brillet, Norbert Champion, Nissan Spector, J Sugar
… to 37 levels of the 4f3 ground configuration in the free ion Nd3+. The levels 4f3 4F3/2 and 4I11/2, responsible for … Nd3+:LaCl3 are 3 to 5 percent smaller than in the free ion. … emission spectrum, energy levels, free-ion, neodymium, parametric fits, triply-ionized, wavelengths …

Frequency ratio of Al + and Hg + single-ion optical clocks; metrology at the 17th decimal place

March 6, 2008
Author(s)
Till P. Rosenband, David Hume, P. O. Schmidt, Chin-Wen Chou, Anders Brusch, Luca Lorini, Windell Oskay, Robert E. Drullinger, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Nathan R. Newbury, W Swann, Wayne M. Itano, David J. Wineland, James C. Bergquist
… Frequency ratio of Al + and Hg + single-ion optical clocks; metrology at the 17th decimal place …

Visible, EUV, and X-Ray Spectroscopy at the NIST EBIT Facility

April 24, 2004
Author(s)
John D. Gillaspy, B Blagojevic, Paul A. Dalgarno, K Fahey, V Kharchenko, J M. Laming, L Logosi, E-O Le Bigot, K Makonyi, L P. Ratliff, E Silver, H. Schnopper, E Takacs, J N. Tan, H Tawara, K Tokesi
… astrophysics, charge exchange, electron beam ion trap, EUV lithography, exreme ultraviolet, fusion, highly …

Enhanced Magnetic Trap Loading for Atomic Strontium

October 26, 2015
Author(s)
Gretchen K. Campbell, Daniel Barker, Benjamin Reschovsky, Neal Pisenti
… the continuous loading of atomic strontium into a magnetic trap from a Magneto-Optical Trap (MOT). This is achieved by adding a depumping laser … The depumping laser increases atom number in the magnetic trap and subsequent cooling stages by up to 65 % for the …

Product ion distributions using H3O+ proton-transfer-reaction time-of-flight mass spectrometry (PTR-ToF-MS): mechanisms, transmission effects, and instrument-to-instrument variability

February 27, 2025
Author(s)
Michael Link, Megan Claflin, Christina Cecelski, Ayomide Akande, Delany Kilgour, Paul Heine, Matthew Coggon, Chelsea Stockwell, Andrew Jensen, Jie Yu, Han Huyhn, Jenna Ditto, Carnsten Warneke, William Dresser, Keighan Gemmell, Spiro Jorga, Rileigh Robertson, Joost de Gouw, Timothy Bertram, Jonathan Abbatt, Nadine Borduas-Dedekind, Dustin Poppendieck
… mass spectrometry (PTR-MS) using hydronium ion (H3O+) ionization is widely used for the measurement of … H3O+ ionization, as well as the associated chemistry in an ion–molecule reactor, is known to generate product ion distributions (PIDs) that include other product ions …

Modeling and Analysis of Single-Plate Shear Connections Under Column Loss

May 8, 2013
Author(s)
Joseph A. Main, Fahim Sadek
… a computational assessment of the behavior of single-plate shear (“shear tab”) connections in gravity frames under … results indicate that the rotational capacities of single-plate shear connections under column loss scenarios are … Modeling and Analysis of Single-Plate Shear Connections Under Column Loss …

Experimental dynamic trapping of electrostatically actuated bistable micro-beams

February 15, 2016
Author(s)
Lior Medina, Rivka Gilat, Robert Ilic, Slava Krylov
… motion allowed for direct visualization of dynamic trapping at the statically inaccessible state. These results … micro-beam, Tailored electrostatic actuation, Dynamic trapping, Dynamic snap-through, Pull-in, MEMS/NEMS, High … Experimental dynamic trapping of electrostatically actuated bistable micro-beams …

Quantitative Surface Characterization of DNA Immobilized on Gold

October 12, 2021
Author(s)
D Y. Petrovykh, H Y. Kimura-Suda, L J. Whitman, Michael J. Tarlov
… of thiolated poly(dT025 single-stranded DNA on gold. When electron attenuation effects are accurately … previous reports of alkanethiol adsorption kinetics on gold, ssDNA immobilization does not occur with Langmuir … Quantitative Surface Characterization of DNA Immobilized on Gold …

Quantitative Analysis and Characterization of DNA Immobilized on Gold

April 30, 2003
Author(s)
D Y. Petrovykh, H Y. Kimura-Suda, L J. Whitman, Michael J. Tarlov
… of thiolated poly(dT)25 single-stranded DNA (ssDNA) on gold. When electron attenuation effects are accurately … previous reports of alkanethiol adsorption kinetics on gold, ssDNA immobilization does not occur with Langmuir … Analysis and Characterization of DNA Immobilized on Gold …

An absolute cavity pyrgeometer to measure the absolute outdoor longwave irradiance with traceability to International System of Units, SI

March 1, 2012
Author(s)
Ibrahim Reda, Jinan Zeng, Jonathan Scheuch, Leonard Hanssen, Daryl Myers, Boris Wilthan, Tom Stoffel
… The ACP consists ofa domeless thermopile pyrgeometer, gold- plated concentrator, temperature controller, and data … errors resulting from using a domeless thermopile, the gold-plated concentrator was placed above the thermopile. The …

Role of Ion-Beam Processing Time in the Formation and Growth of the High-Nitrogen Phase in Austenitic Stainless Steel

November 1, 2000
Author(s)
D L. Williamson, P J. Wilber, F R. Fickett, S Parascandola
… been prepared as a function of exposure time to a nitrogen ion beam Times from 15 to 4 h were selected with other … below the γ N and was found to be introduced during the Ar-ion sputter-cleaning/heating step used prior to exposure to the N-ion beam. This C-rich layer is punished ahead of the incoming …

High-precision measurements of n = 2 - n = 1 transition energies and level widths in He- and Be- like Argon Ions

March 26, 2018
Author(s)
Jorge Machado, Csilla Szabo-Foster, Jose Paulo Santos, Pedro Amaro, Mauro Guerra, Guojie Bian, Jean-Michel Isac, Paul Indelicato
… and of the 1s2s22p 1P1 → 1s22s2 1S0 line in Be-like argon ions. The highly-charged ions were produced in the plasma of an Electron-Cyclotron … Highly charged ions, He-like argon, Be-like argon, level widths, transition … energies and level widths in He- and Be- like Argon Ions …

Dynamic Partitioning of Neutral Polymers into a Single Ion Channel

June 1, 1999
Author(s)
S. M. Bezrukov, John J. Kasianowicz
… using single nanometer-scale pores formed by protein ion channels. The ionic conductance of a channel depends on … glycol) into two structurally and chemically different ion channels (staphylococcus aureus α-hemolysin and … alamethecin, alpha-hemolysin, diffusion, ion channel, noise analysis, partition coefficient, PEG, …

Template synthesis of gold nanoparticles with an organic molecular cage

January 16, 2014
Author(s)
Ryan McCaffrey, Hai Long, Yinghua Jin, Aric Sanders, Wounjhang Park, Wei Zhang
… We report a novel strategy for the controlled synthesis of gold nanoparticles (AuNPs) with narrow size distribution (1.9 … Template synthesis of gold nanoparticles with an organic molecular cage …

Calibration of a Stopping Power Model for Silicon Based on Analysis of Neutron Depth Profiling and Secondary Ion Mass Spectrometry Measurements

June 1, 2002
Author(s)
Kevin J. Coakley, Huaiyu H. Chen-Mayer, George P. Lamaze, David S. Simons, P E. Thompson
… a silicon sample with four delta-doped planes by secondary ion mass spectrometry. In a neutron depth profiling (NDP) … model calibration, neutron depth profiling, secondary ion mass spectrometry, silicon, stopping power, transport of … Based on Analysis of Neutron Depth Profiling and Secondary Ion Mass Spectrometry Measurements …

Ultrasmooth Gold as a Top Metal Electrode for Molecular Electronic Devices

April 7, 2009
Author(s)
Mariona Coll Bau, Christina A. Hacker, Lauren H. Miller, Daniel R. Hines, E. C. Williams, Curt A. Richter
… This work introduces the use of ultrasmooth nanolaminated gold on polymeric substrates, fabricated by using an … high-quality COOH-terminated alkanethiols on ultrasmooth gold. Covalent bonding to the H-Si(111) substrate was … Ultrasmooth Gold as a Top Metal Electrode for Molecular Electronic Devices …

Preparation, Characterization, and Biological Activity of Stability-Enhanced Polyethyleneimine-Conjugated Gold Nanoparticles (Au-PEI@NIST) for Biological Application

September 16, 2021
Author(s)
Tae Joon Cho, Vincent A. Hackley, Feng Yi, David A. LaVan, Vytas Reipa, Alessandro Tona, Bryant C. Nelson, Christopher Sims, Natalia Farkas
… AuNPs, Au-PEI, gold nanoparticles, gold-polyethyleneimine, polyethyleneimine, positively charged gold nanoparticles, colloidal stability, nanotoxicity. … of Stability-Enhanced Polyethyleneimine-Conjugated Gold Nanoparticles (Au-PEI@NIST) for Biological Application …
Displaying 776 - 800 of 4633
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