scholarly journals Dispersion of the Valence Electron Energy Loss in Thin Amorphous Carbon Films deposited by Ion Assisted Evaporation of Graphite

1995 ◽  
Vol 6 (1) ◽  
pp. 113-120 ◽  
Author(s):  
Uwe Falke ◽  
Anne-Katrin Weber ◽  
Jens Ullmann
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Valence Electron ◽  
Carbon Films ◽  
Amorphous Carbon Films ◽  
Electron Energy Loss

Investigation on the Microstructure of Hydrogenated Amorphous Carbon Films by Electron Energy-Loss Spectroscopy

1990 ◽  
Vol 29 (Part 2, No. 11) ◽  
pp. L2108-L2110 ◽  
Author(s):  
Hisashi Yamazaki ◽  
Mitsuhiro Katashima ◽  
Ichiro Bekku ◽  
Masahiro Mihara ◽  
Naoki Okuyama
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Electron Energy Loss Spectroscopy ◽  
Carbon Films ◽  
Amorphous Carbon Films ◽  
Hydrogenated Amorphous Carbon ◽  
Electron Energy Loss ◽  
Hydrogenated Amorphous

Electron energy loss study of diamond-like and amorphous carbon films

1993 ◽  
Vol 2 (5-7) ◽  
pp. 873-878 ◽  
Author(s):  
E.A. Maydell ◽  
E. Dunlop ◽  
D.J. Fabian ◽  
J. Haupt ◽  
W. Gissler
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Carbon Films ◽  
Amorphous Carbon Films ◽  
Electron Energy Loss

Density,sp3fraction, and cross-sectional structure of amorphous carbon films determined by x-ray reflectivity and electron energy-loss spectroscopy

2000 ◽  
Vol 62 (16) ◽  
pp. 11089-11103 ◽  
Author(s):  
A. C. Ferrari ◽  
A. Libassi ◽  
B. K. Tanner ◽  
V. Stolojan ◽  
J. Yuan ◽  
...  
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Electron Energy Loss Spectroscopy ◽  
Carbon Films ◽  
Cross Sectional ◽  
Amorphous Carbon Films ◽  
X Ray ◽  
Electron Energy Loss ◽  
Sectional Structure

Electron energy-loss spectrometry on thin amorphous carbon films: Accurate determination of the plasmon energy

1997 ◽  
Vol 235 (5) ◽  
pp. 551-556 ◽  
Author(s):  
H. Roth ◽  
K. Lang ◽  
M. Ebelshäuser ◽  
D. Lang ◽  
H. Schmoranzer
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Accurate Determination ◽  
Carbon Films ◽  
Plasmon Energy ◽  
Amorphous Carbon Films ◽  
Electron Energy Loss Spectrometry ◽  
Electron Energy Loss

Quantifying the low-energy limit and spectral resolution in valence electron energy loss spectroscopy

2013 ◽  
Vol 124 ◽  
pp. 130-138 ◽  
Author(s):  
Jeffery A. Aguiar ◽  
Bryan W. Reed ◽  
Quentin M. Ramasse ◽  
Rolf Erni ◽  
Nigel D. Browning
Keyword(s):  
Energy Loss ◽  
Electron Energy ◽  
Spectral Resolution ◽  
Electron Energy Loss Spectroscopy ◽  
Valence Electron ◽  
Low Energy ◽  
Energy Limit ◽  
Electron Energy Loss

Electron Energy Loss Spectroscopy (EELS) of Iron Fischer–Tropsch Catalysts

2006 ◽  
Vol 12 (2) ◽  
pp. 124-134 ◽  
Author(s):  
Yaming Jin ◽  
Huifang Xu ◽  
Abhaya K. Datye
Keyword(s):  
Iron Oxide ◽  
Energy Loss ◽  
Electron Energy ◽  
Amorphous Carbon ◽  
Electron Energy Loss Spectroscopy ◽  
Iron Carbide ◽  
Iron Catalysts ◽  
Fischer Tropsch ◽  
Iron Phase ◽  
Electron Energy Loss

Electron energy loss spectroscopy (EELS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy have been used to study iron catalysts for Fischer–Tropsch synthesis. When silica-containing iron oxide precursors are activated in flowing CO, the iron phase segregates into iron carbide crystallites, leaving behind some unreduced iron oxide in an amorphous state coexisting with the silica binder. The iron carbide crystallites are found covered by characteristic amorphous carbonaceous surface layers. These amorphous species are difficult to analyze by traditional catalyst characterization techniques, which lack spatial resolution. Even a surface-sensitive technique such as XPS shows only broad carbon or iron peaks in these catalysts. As we show in this work, EELS allows us to distinguish three different carbonaceous species: reactive amorphous carbon, graphitic carbon, and carbidic carbon in the bulk of the iron carbide particles. The carbidic carbon K edge shows an intense “π*” peak with an edge shift of about 1 eV to higher energy loss compared to that of the π* of amorphous carbon film or graphitic carbon. EELS analysis of the oxygen K edge allows us to distinguish the amorphous unreduced iron phase from the silica binder, indicating these are two separate phases. These results shed light onto the complex phase transformations that accompany the activation of iron catalysts for Fischer–Tropsch synthesis.

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