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Displaying 1876 - 1900 of 3758

Polyelectrolyte association and solvation

July 10, 2018
Author(s)
Alexandros Chremos, Jack F. Douglas
There has been significant interest in the tendency of highly charged particles having the same charge to form dynamic clusters in solution, but an accepted theoretical framework that can account for this ubiquitous phenomenon has been slow to develop. The

Temperature dependent 29Si incorporation during deposition of highly enriched 28Si films

November 16, 2017
Author(s)
Kevin J. Dwyer, Hyun S. Kim, David S. Simons, Joshua M. Pomeroy
… into highly enriched 28Si films deposited by hyperthermal ion beams at elevated temperatures in the dilute presence of … in situ beyond 99.99998 % 28Si onto Si(100) using an ion beam deposition system and seek to systematically vary … measure the impact on quantum coherence. We use secondary ion mass spectrometry to measure the residual 29Si isotope …

Interpretation of Effects at the Static Fatigue Limit of Soda-Lime-Silicate Glass

December 1, 2005
Author(s)
Theo Fett, J -. Guin, Sheldon M. Wiederhorn
… layer is built up on the crack surface as a consequence of ion exchange at the crack tip. This model extends the one presented earlier by Bunker and Michalske. Ion exchange between hydronium (H3O+) in the solution and … by the basic solutions that form as a consequence of ion exchange; for the fact that crack tip bifurcation is …

2,5-Dihydroxybenzoic Acid: Laser Desorption/Ionisation as a Function of Elevated Temperature

March 1, 2005
Author(s)
William E. Wallace, Mark Arnould, R Knochenmuss
… dependence of laser desorption/ionization (LDI) ion yields has been measured for 2,5-dihydroxybenzoic acid … C using time-of-flight mass spectrometry. A steep rise in ion production occurs at 90 C, achieving a maximum between … of the sample into the vacuum. The overall trend in ion production is well described by a comprehensive two-step …

TRC Thermodynamic Tables, Non-Hydrocarbons Supplement NH-101

August 3, 2009
Author(s)
Michael D. Frenkel
… Pages db-290.0 through db-290.9: New table for hydrogen sulfide containing the density for the real fluid at … Pages jk-290.0 through jk-290.9: New table for hydrogen sulfide containing the speed of sound for the real … Pages jl-290.0 through jl-290.9: New table for hydrogen sulfide containing the adiabatic compressibility for …

Insertion of Dengue E into Lipid Bilayers Studied by Neutron Reflectivity Molecular Dynamics Simulations

February 13, 2018
Author(s)
Juan M. Vanegas, Frank Heinrich, David M. Rogers, Bryan D. Carson, Sadie La Bauve, Briana C. Vernon, Sushil K. Satija, Aihua Zheng, Margaret Kielian, Susan B. Rempe, Michael S. Kent
… show that tilting of the protein correlates with hydrogen bond formation between lysines located on the sides … the tip (K246 and K247) and nearby lipid headgroups. These hydrogen bonds provide the majority of the interaction energy …

The Decomposition and Isomerization of 5-Methylhex-1-yl Radical

July 9, 2010
Author(s)
Iftikhar A. Awan, William S. McGivern, Wing Tsang, Jeffrey A. Manion
… is deduced to be a factor of 4.0 ± 0.7 faster on a per hydrogen basis than the analogous abstraction of a secondary hydrogen in 1-hexyl radical. The estimated uncertainty …

Comprehensive Inelastic Neutron Scattering Study of the Multiferroic Mn 1-x Co x WO 4

December 14, 2018
Author(s)
Jinchen Wang, R. S. Fishman, Yiming Qiu, J. A. Fernandez-Baca, Georg Ehlers, K.-C. Liang, Yaqi Wang, Bernd Lorenz, C. W. Chu, Feng Ye
… (J i up to 12th nearest-neighbors) and the single-ion anisotropy K induced by the spin-orbit interaction. While … the dominant effect of doping is to change the single-ion anisotropy from easy axis (K> 0) in the collinear AF1 …

A Schrodinger Cat" Superposition State of an Atom

January 1, 1996
Author(s)
C Monroe, D M. Meekhof, B E. King, David J. Wineland
… was generated at the single atom level. A trapped 9Be+ ion was laser-cooled to the zero-point energy and then … (electronic) and external (motional) states of the ion. The Schrödinger cat superposition was verified by …

Measurement of the Surface Density of States by Field Ionization

October 1, 1975
Author(s)
David R. Penn
… It is shown that recent measurements of field ion energy distributions from clean tungsten surfaces probe … We find j() = (2/kh)m| d3rm(r) z|2(-m), where j() is the ion current a , mand m are electronic metal eigenfunctions …

Molecular transport enhancement in purely metallic carbon nanotube porins

June 27, 2024
Author(s)
Yuhao Li, Sidi Zhao, Rahul Prasanna Misra, Chenxing Liang, Alice Judith Gillen, jobaer abdullah, Ted Laurence, Jeffrey Fagan, Narayana Aluru, Daniel Blankschtein, Aleksandr Noy
… nanotubes over the semiconducting nanotubes, whereas ion transport was largely insensitive to the nanotube … polarizability tensor of the carbon nanotubes to the ion-nanotube interactions and the water friction coefficient. …

Enhanced Proton Selectivity in Ionomer Nanocomposites Containing Hydrophobically Functionalized Silica Nanoparticles for Vanadium Redox Flow Batteries

January 4, 2021
Author(s)
Allison Domhoff, Tyler Martin, Liyanage M. Silva, Mansour Saberi, Stephen Creager, Eric Davis
… traditional PFSA ionomers suffer from high vanadium ion crossover, i.e., low ion selectivity, which reduces the efficiency and lifetime of … composite ionomers exhibit drastically reduced vanadium ion permeability and an almost two orders of magnitude …

Transport and Electromechanical Properties of Ca3TaGa3Si2O14 Piezoelectric Crystals at Extreme Temperatures

January 13, 2019
Author(s)
Yuriy Suhak, Ward L. Johnson, Andrei Sotnikov, Hagen Schmidt, Holger Fritze
… analysis of oxygen-18 diffusion profiles using secondary ion mass spectrometry (SIMS). Determined oxygen … self-diffusion coefficients enable calculation of oxygen ion contribution to the total conductivity, which is shown to … must be dominated by electron transport. Further, ion and electron conductivities are governed by different …

ToF-SIMS 3D Imaging of Native and Non-Native Species within HeLa Cells

November 26, 2013
Author(s)
Jeremy Brison, Michael A. Robinson, Danielle S. Benoit, Shinichiro Muramoto, Patrick S. Stayton, David G. Castner
… within single HeLa cells using time-of-flight secondary ion mass spectrometry (ToF-SIMS). The z-axis corrected 3D … Optimal 3D images were acquired using a Bi3+ liquid metal ion gun operating in the simultaneous high mass and spatial …

Validated Sheath Model for Radio-Frequency-Biased, High-Density Plasmas

October 16, 2008
Author(s)
Mark Sobolewski
… at frequencies (omega) comparable to (omega sub i), the ion plasma frequency at the edge of the sheath. The model treats ion dynamics using fluid equations, including all time … than that obtained by models which neglect time-dependent ion dynamics. The model explains why methods of extracting …
Displaying 1876 - 1900 of 3758
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