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Displaying 726 - 750 of 4258

Bevel Depth Profiling SIMS for Analysis of Layer Structures

September 1, 2003
Author(s)
John G. Gillen, Scott A. Wight, P Chi, Albert J. Fahey, Jennifer R. Verkouteren, Eric S. Windsor, D. B. Fenner
… are evaluating the use of bevel depth profiling Secondary Ion Mass Spectrometry (SIMS) for the characterization of … the analytical sample with an oxygen or cesium primary ion beam in a commercial SIMS instrument. The elemental … the resulting bevel surface is then imaged with a focused ion beam in the same instrument. This approach offers maximum …

Synthesis and Single-Crystal X-Ray Diffraction Studies of New Framework Substituted Type II Clathrates, Cs 8 Na 16 Ag x Ge 136-x (x 7)

April 13, 2007
Author(s)
Matthew Beekman, Winnie Wong-Ng, James A. Kaduk, Alexander J. Shapiro, George S. Nolas
… New inorganic type II clathrates with Ag atoms substituting for framework Ge … diffraction. The materials crystallize with the cubic type II clathrate crystal structure (space group Fd-3m) with a = … offer a route to the synthesis of new compositions of type II clathrates, materials that are of interest for potential …

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 …

Measuring Ion-Pairing in Buffer Solutions with Microwave Microfluidics

June 14, 2018
Author(s)
Angela C. Stelson, Charles A. Little, Nathan D. Orloff, Christian J. Long, James C. Booth
… such as electrical double layers (EDL), solvent-mediated ion interactions, and bound water molecules. However, … relaxations associated with the EDL, water molecules, and ion-pairing in solution. We compare the three-Debye … fit to a Cole-Cole/Debye model which does not include the ion-pairing relaxation, and find improved goodness of fit. …

The Inner Shell Spectroscopy Beamline at NSLS-II: a facility for in situ and operando X-ray absorption spectroscopy for materials research

July 1, 2022
Author(s)
Bruce D. Ravel, Denis Leshchev, Bruno Luvizotto, Ruslan Kadyrov, Klaus Attenkofer, Eli Stavitski
… the 8-ID station at the National Synchrotron Light Source II (NSLS-II), Upton, NY, USA, is a high throughput X-ray Absorption … The Inner Shell Spectroscopy Beamline at NSLS-II: a facility for in situ and operando X-ray absorption …

Density changes in amorphous silicon induced by swift heavy ions

October 4, 2022
Author(s)
Sjoerd Roorda, Amelie Lacroix, Stephanie Codsi, Gabrielle Long, Fan Zhang, Steven Weigand, Christina Trautmann
… silicon membranes were irradiated with swift heavy ions (75 MeV Ag or 1.1 GeV Au ions) and studied by small angle X-ray scattering. The samples that were irradiated with 1.1 GeV Au ions produced a scattering pattern consistent with core-shell … Density changes in amorphous silicon induced by swift heavy ions …

Chemical Ionization of Saturated Hydrocarbons Using Organometallic Ion Chemistry

July 1, 2002
Author(s)
H M. Byrd, Charles M. Guttman, D P. Ridge
… the feasibility of the h5-cyclopentadienylcobalt ion (CpCo +) as a suitable cationization reagent for … hydrocarbons analysis by mass spectrometry.Methods: Ion/molecule reactions of CpCo + and selected linear alkanes … (no. of C atoms 15) were examined using Fourier-transform ion cyclotron resonance mass spectrometry. Second-order rate …

EBIT Diagnostics Using X-ray Spectra of Highly Ionized Ne

May 1, 2003
Author(s)
M Matranga, M Barbera, A Maggio, G Peres, S Serio, E Takacs, E Silver, John D. Gillaspy, H. Schnopper, J M. Laming, J. Beeman, E. E. Haller, N. Madden
… line ratio. We have investigated possible effects of the ion dynamics on the plasma emission line intensities, looking … and hence the overlap between the electron beam and the ion cloud, depend on the electron beam operating parameters. … the value of future improved studies of the trapped ion dynamics, both for understanding the EBIT performance and …

Measurements of trapped-ion heating rates with exchangeable surfaces in close proximity

January 15, 2017
Author(s)
Dustin A. Hite, Kyle S. McKay, Shlomi Salman Kotler, Dietrich G. Leibfried, David J. Wineland, David P. Pappas
… Electric-field noise from the surfaces of ion-trap electrodes couples to the ion’s charge causing heating of the ion’s motional modes. This heating limits the fidelity of … Measurements of trapped-ion heating rates with exchangeable surfaces in close …

Coherent Quantum State Manipulation of Trapped Atomic Ions

January 1, 1998
Author(s)
David J. Wineland, C Monroe, D M. Meekhof, B E. King, Dietrich G. Leibfried, Wayne M. Itano, James C. Bergquist, D J. Berkeland, John J. Bollinger, J D. Miller
… realizing, quantum computation based on multiple trapped ions. … Coherent Quantum State Manipulation of Trapped Atomic Ions …

Degradation of Poly(Acrylates)Under SF 5 + Primary Ion Bombardment Studied Using Time of Flight Secondary Ion Mass Spectrometry 2. Poly(n-Alkyl Methacrylates)

January 5, 2005
Author(s)
M S. Wagner
… molecular depth profiling of these polymers by secondary ion mass spectrometry (SIMS). This study is the second in a … chemistry on polymer degradation under polyatomic primary ion bombardment. In this study, time-of-flight SIMS … sputter rate and stability of the characteristic secondary ion intensities of these polymers decreased linearly with …

A simple approach for selective crystal growth of Na8Si46 and Na24Si136

February 10, 2011
Author(s)
Winnie K. Wong-Ng, S Stefanoski, Peter Zavalij, George S. Nolas, Beekman Mathew
… two different structure types (clathrate-I and clathrate-II), which are characterized by nearly identical … growth, crystal structure, Type-I Na8Si46 clathrate, Type-II Na24Si136 clathrate …

Quantifying the Effect of Guest Binding on Host Environment

August 29, 2023
Author(s)
Angela Stelson, Zack Fishman, Jacob Pawlik, Gosia Musial, Jim Booth, Chris Long, Kathleen Schwarz, Nate Orloff, Hugh Ryan, Angela Grommet, Jonathan Nitschke, Felix Rizzuto
… microfluidic spectroscopy to quantify the hydration and ion pairing of a FeII4L4 coordination cage with a set of … guest. The impact of different guest properties on host ion pairing and hydration was determined through microwave … of the guest has the greatest impact on the solvent and ion-pairing dynamics surrounding the host. We also observed …

Heating Rates and Enhanced Equilibration Rates with Strongly Correlated Ions in a Penning-Malmberg Trap

June 25, 2006
Author(s)
John J. Bollinger, Marie J. Jensen, T Hasegawa, D H. Dubin
… We laser cool up to 10 6 9 Be + ions to ~ 1 mK in a Penning-Malmberg trap and measure the ion … off the cooling laser. We observe a rapid heating of the ions when the their temperature in a direction parallel to … cyclotron motion with the parallel motion of the 9 Be + ions. The observed equilibration is more than 14 orders of …

Ionization potentials of superheavy elements No, Lr, and Rf and their ions

October 3, 2016
Author(s)
Vladimir A. Dzuba, M.S. Safronova, Ulyana I. Safronova, Alexander Kramida
… potentials of superheavy elements No, Lr, and Rf and their ions using a relativistic hybrid method that combines con … calculated ionization potential of Yb, Lu, Hf, and their ions, which are homologues of the superheavy elements of this … potentials of superheavy elements No, Lr, and Rf and their ions …

Entangled States of Atomic Ions for Quantum Metrology and Computation

January 1, 1996
Author(s)
David J. Wineland, C Monroe, D M. Meekhof, B E. King, Dietrich G. Leibfried, Wayne M. Itano, James C. Bergquist, D J. Berkeland, John J. Bollinger, J D. Miller
… in realizing, quantum logic based on multiple trapped ions. … Entangled States of Atomic Ions for Quantum Metrology and Computation …

The Effect of Substrate Material on Silver Nanoparticle Antimicrobial Efficacy

December 1, 2010
Author(s)
Benita Dair, Dave M. Saylor, T. E. Cargal, Grace R. French, Kristen M. Kennedy, Rachel S. Casas, Jonathan E. Guyer, James A. Warren, Steven K. Pollack
… bulk counterparts may be attributed to an increased silver ion (Ag+) solubility, and hence availability, that arises due … and experiment to determine the effect of substrate on ion release from silver particles in electrochemical … also observed that with time of exposure to DI water, Ag+ ion release increases to a maximum value at 5 minutes before …

Recovery of background structures in nanoscale Helium Ion Microscope imaging, and the use of progressive fractional diffusion smoothing.

December 31, 2014
Author(s)
Andras Vladar
… two step enhancement technique applicable to noisy Helium Ion Microscope images in which background structures are not … fractional diffusion smoothing, nanoscale helium ion microscopy, noise reduction, HIM, SEM. … Recovery of background structures in nanoscale Helium Ion Microscope imaging, and the use of progressive fractional …
Displaying 726 - 750 of 4258
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