Results 21 to 30 of about 415,757 (381)

Search for an Near-IR Counterpart to the Cas A X-ray Point Source [PDF]

open access: yes, 2001
We report deep near-infrared and optical observations of the X-ray point source in the Cassiopeia A supernova remnant, CXO J232327.9+584842. We have identified a J=21.4 +/- 0.3 mag and Ks=20.5 +/- 0.3 mag source within the 1-sigma error circle, but we ...
Aschenbach B.   +13 more
core   +4 more sources

Efecto del tratamiento de sellado en el comportamiento frente a corrosión de la aleación anodizada de aluminio-litio AA2099

open access: yesRevista de Metalurgia, 2020
El comportamiento frente a corrosión de la aleación de aluminio AA2099 anodizado en solución de H2SO4, aplicando dos densidades de corriente diferentes, 0,19 o 1,0 A·cm−2, con dos tratamientos de sellado diferentes en H2O y en Na2Cr2O7 (6% peso) a 95 °C,
Pedro Samaniego-Gámez   +9 more
doaj   +1 more source

Determination of the Insulation Solution that Leads to Lower CO2 Emissions during the Construction Phase of a Building [PDF]

open access: yes, 2019
The characteristics of the envelope of a building determine, together with other factors, its consumption of energy. Additionally, the climate zone and insulation material may vary the minimum insulation thickness of walls and roofs, making it different,
Bastante-Ceca,   +4 more
core   +3 more sources

Practical guides for x-ray photoelectron spectroscopy: Quantitative XPS

open access: yesJournal of Vacuum Science and Technology, 2020
X-ray photoelectron spectroscopy (XPS) is widely used to identify chemical species at a surface through the observation of peak positions and peak shapes. It is less widely recognized that intensities in XPS spectra can also be used to obtain information
A. Shard
semanticscholar   +1 more source

Demonstration of chemistry at a point through restructuring and catalytic activation at anchored nanoparticles

open access: yesNature Communications, 2017
Metal nanoparticles prepared by exsolution at the surface of perovskite oxides are key species in catalysis and energy fields. Here, the authors develop a chemistry at a point concept by tracking individual nanoparticles with excellent activity and ...
Dragos Neagu   +10 more
doaj   +1 more source

Effects of Residual Gas on Tribochemical Reactions of SUJ2 Steel in Vacuum and in Argon Gas Atmosphere

open access: yesTribology Online, 2009
To analyze the mechanisms of tribochemical reactions occurring between atmospheric gases and materials induced by friction, the authors have developed a friction test system with integrated XPS.
Hiroki Mano   +6 more
doaj   +1 more source

Determination of chromium valence state in the CaO–SiO2–FeO–MgO–CrOx system by X-ray photoelectron spectroscopy

open access: yesHigh Temperature Materials and Processes, 2020
The chromium valence states in the CaO–SiO2–FeO–MgO–CrOx system were investigated by X-ray photoelectron spectroscopy (XPS). The results indicated that the XPS peaks of Cr 2p3/2 and Cr 2p1/2 locate at the binding energy of ∼577 and ∼586 eV, respectively.
Liu Deman   +5 more
doaj   +1 more source

Low temperature atomic layer deposition of cobalt using dicobalt hexacarbonyl-1-heptyne as precursor

open access: yesBeilstein Journal of Nanotechnology, 2023
In this work, we present the development of an atomic layer deposition (ALD) process for metallic cobalt. The process operates at low temperatures using dicobalt hexacarbonyl-1-heptyne [Co2(CO)6HC≡CC5H11] and hydrogen plasma.
Mathias Franz   +5 more
doaj   +1 more source

Electrochemical activation of molecular nitrogen at the Ir/YSZ interface. [PDF]

open access: yes, 2011
Nitrogen is often used as an inert background atmosphere in solid state studies of electrode and reaction kinetics, of solid state studies of transport phenomena, and in applications e.g. solid oxide fuel cells (SOFC), sensors and membranes.
Alexei Barinov   +65 more
core   +3 more sources

Guide to XPS data analysis: Applying appropriate constraints to synthetic peaks in XPS peak fitting

open access: yesJournal of Vacuum Science & Technology A, 2022
Peak fitting of x-ray photoelectron spectroscopy (XPS) data is the primary method for identifying and quantifying the chemical states of the atoms near the surface of a sample.
George H. Major   +4 more
semanticscholar   +1 more source

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