Results 101 to 110 of about 157,015 (313)

Differential Mobility Spectrometry-Mass Spectrometry (DMS-MS) for Uranium Ion Prefiltration to Improve Isotope Ratio Analysis

, 2020
We demonstrate chemical noise filtration by differential mobility spectrometry (DMS) ahead of an ion trap mass analyzer. Use of DMS enables 10x improved accuracy in the isotope ratio measurement made for a sample of natural ...
Jacob T., Shelley, Theresa, Evans-Nguyen, Nelson, Rapalo Perdomo, Ifeoluwa, Ayodeji   +3 more
core   +1 more source

Time‐Dependent Oxidation and Scale Evolution of a Wrought Co/Ni‐Based Superalloy

Advanced Engineering Materials, EarlyView.
This study shows how a new wrought Co/Ni‐based superalloy resists oxidation at 800 ∘$^\circ$C. The oxide scale changes from rough, fast‐growing spinel to a dense, protective chromia–alumina layer. Atom probe analysis reveals tiny refractory‐rich bubbles at the interface that mark the transition to long‐term, diffusion‐controlled protection ...
Cameron Crabb, Zachary T. Kloenne, Samuel R. Rogers, Chi Hang Dominik Kwok, Mark C. Hardy, Michele S. Conroy, David Dye   +6 more
wiley   +1 more source

Revolutions in lipid isomer resolution: application of ultra-high resolution ion mobility to reveal lipid diversity

, 2023
Many families of lipid isomers remain unresolved by contemporary liquid chromatography-mass spectrometry ap-proaches, leading to a significant underestimation of structural diversity within the lipidome.
Berwyck, Poad, Reuben, Young, Stephen, Wong, Stephen, Blanksby, Mark, Ritchie, Lachlan, Jekimovs, Therese, Fulloon, Puttandon, Wongsomboon, David, Marshall, Michael, Pfrunder, Felicia, Hansen, Tyren, Dodgen   +11 more
core   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Analysis of the ion mobility spectra of chloroacetophenone, tris(2-chloroethyl)amine, and methanethiol

Тонкие химические технологии
Objectives. To determine the ion mobilities of chloroacetophenone, tris(2-chloroethyl)amine, and methanethiol; the structure of ions corresponding to characteristic signals; the detection limits of chloroacetophenone, tris(2-chloroethyl)amine, and ...
D. A. Aleksandrova, T. B. Melamed, E. P. Baberkina, E. S. Osinova, L. A. Luzenina, A. A. Kaplin, R. V. Yakushin, A. E. Kovalenko, G. V. Tsaplin, Yu. B. Sinkevich, A. A. Fenin, J. R. Shaltaeva, V. V. Belyakov, A. O. Shablya, A. G. Sazonov   +14 more
doaj   +1 more source

Pulsed electron beams in ion mobility spectrometry

Reviews in Analytical Chemistry, 2012
Ion mobility spectrometry is a well-known technique used to analyze trace gases in ambient air. Typically, it works by employing a radioactive source to provide electrons with high energy to ionize the analytes in a series of chemical reactions.
Baether Wolfgang, Zimmermann Stefan, Gunzer Frank   +2 more
doaj   +1 more source

Dopant-assisted photoionization ion source for drift-tube ion mobility spectrometer and its applications in detection of explosives

, 2013
Dopant-assisted photoionization ion source for drift-tube ion mobility spectrometer and its applications in detection of ...
王卫国, 李海洋, 梁茜茜, 程沙沙, 温萌   +4 more
core  

High mobility III-V MOSFETs for RF and digital applications [PDF]

, 2007
Developments over the last 15 years in the areas of materials and devices have finally delivered competitive III-V MOSFETs with high mobility channels. This paper briefly reviews the above developments, discusses properties of the GdGaO/Ga2O3 MOS systems,
Kalna, K., A. Zlotnicka, Moran, D.A.J., D. Macintyre, H. Zhou, O. Hartin, Asenov, A., Zlotnicka, A., Passlack, M., M. Tutt, X. Li, Y.-B. Park, K. Kalna, Droopad, R., Hartin, O., Fejes, P., J. Abrokwah, E. Johnson, Tutt, M., Abrokwah, J., S. Thoms, A. Asenov, Zurcher, P., Rajagopalan, K., Thoms, S., Park, Y-B, Macintyre, D., D.A.J. Moran, M. Passlack, K. Rajagopalan, Li, X., Thayne, I.G., Zhou, H., P. Fejes, P. Zurcher, I.G. Thayne, R. Droopad, Hill, R.J.W., R.J.W. Hill, Johnson, E.   +39 more
core   +1 more source

Hydrogen‐Assisted Fracture of Iron‐Based Fe–Ni–Al Alloys

Advanced Engineering Materials, EarlyView.
Principal relations and fracture mechanisms of single‐phase and precipitate‐strengthened Fe–Ni–Al alloys subjected to prior electrochemical hydrogen charging are identified. The mechanisms of hydrogen effect on strength and microhardness are discussed, including hydrogen‐induced increase in microhardness and the role of hydrogen in fracture behavior ...
Nataliya Yadzhak, Olha Zvirko, Rostyslav Leshchak, Hryhoriy Nykyforchyn   +3 more
wiley   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source