UV Photoelectron Spectroscopy at Near Ambient Pressures: Mapping Valence Band Electronic Structure Changes from Cu to CuO

2014 ◽  
Vol 86 (8) ◽  
pp. 3683-3687 ◽  
Author(s):  
Kanak Roy ◽  
Chinnakonda S. Gopinath
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Structure Changes ◽  
Uv Photoelectron Spectroscopy

scholarly journals Determination of the valence band edge of Fe oxide nanoparticles dispersed in aqueous solution through resonant photoelectron spectroscopy from a liquid microjet

2021 ◽  
Author(s):  
Giorgia Olivieri ◽  
Gregor Kladnik ◽  
Dean Cvetko ◽  
Matthew A. Brown
Keyword(s):  
Aqueous Solution ◽  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Band Edge ◽  
Photoemission Spectroscopy ◽  
Oxide Nanoparticles ◽  
Valence Band Edge ◽  
Resonant Photoemission

The electronic structure of hydrated nanoparticles can be unveiled by coupling a liquid microjet with a resonant photoemission spectroscopy.

XPS, AES AND UPS INVESTIGATION OF SnO2/Si AND DFT-BASED THEORETICAL STUDY WITHIN THE mBJ-GGA SCHEME

2020 ◽  
pp. 2050048
Author(s):  
A. MOKADEM ◽  
M. BOUSLAMA ◽  
B. KHAROUBI ◽  
A. OUERDANE ◽  
R. KHENATA ◽  
...  
Keyword(s):  
Valence Band ◽  
Density Of States ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Generalized Gradient ◽  
Functional Theory ◽  
Electronic Distribution ◽  
Complementary Techniques ◽  
Uv Photoelectron Spectroscopy ◽  
Theoretical Results

We investigate the growth performance of tin oxide on the Si substrate, achieved by spray pyrolysis using the sensitive analysis techniques X-Ray Photoelectron Spectroscopy (XPS) and Auger Electron Spectroscopy (AES). These complementary techniques confirm the growth of homogeneous SnO2 thin films. We also study the electronic distribution of the valence band of SnO2 theoretically using density functional theory (DFT). The chemical and physical properties of the material depend on the electron structure varying as a function of energy. The density of states (DOS) is calculated using the modified Becke–Johnson-Generalized Gradient Approximation (mBJ-GGA) in order to identify the electronic orbitals and the importance of their contribution to the electronic structure of the valence band. Furthermore, we use the experimental technique UV Photoelectron Spectroscopy (UPS) for studying the electronic distribution within the valence band and for validating the theoretical results of the density of states of SnO2/Si.

scholarly journals Valence-band electronic structure of iron phthalocyanine: An experimental and theoretical photoelectron spectroscopy study

2011 ◽  
Vol 134 (7) ◽  
pp. 074312 ◽  
Author(s):  
Barbara Brena ◽  
Carla Puglia ◽  
Monica de Simone ◽  
Marcello Coreno ◽  
Kartick Tarafder ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Iron Phthalocyanine ◽  
Spectroscopy Study

Electronic Structure and Surface Science of delta Plutonium

2003 ◽  
Vol 802 ◽  
Author(s):  
M. Butterfield ◽  
T. Durakiewicz ◽  
E. Guziewicz ◽  
J. J. Joyce ◽  
D. P. Moore ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Laser Ablation ◽  
High Resolution ◽  
Valence Band ◽  
Surface Science ◽  
Photoelectron Spectroscopy ◽  
Room Temperature ◽  
Instrument Resolution ◽  
Δ Phase

AbstractHigh resolution photoelectron spectroscopy (PES) studies were conducted on a δ-phase Plutonium sample cleaned by laser ablation and gas dosed with O2 and H2. The measurements were made with an instrument resolution of 60 meV and with the sample at 77 K. The PES data strongly support a model with Pu2O3 growth on the metal and then PuO2 growth on the Pu2O3 layer at this temperature. In vacuum, the PuO2 reduces to Pu2O3 at room temperature with a pressure of 6×10−11 Torr. In the case of H2 dosing the hydrogen appears to penetrate the surface and disrupt the valence band as evidenced by a drop in intensity of the peak at EF which is not accompanied by a drop in the main 5f manifold at ∼2eV.

The electronic structure of a diarsaallene –AsCAs– and a phosphaarsaallene –PCAs–: UV photoelectron spectroscopy and theoretical studies

2004 ◽  
Vol 690 (1-3) ◽  
pp. 53-61 ◽  
Author(s):  
Karinne Miqueu ◽  
Jean-Marc Sotiropoulos ◽  
Patrick Baylère ◽  
Sylvie Joantéguy ◽  
Geneviève Pfister-Guillouzo ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Photoelectron Spectroscopy ◽  
Theoretical Studies ◽  
Uv Photoelectron Spectroscopy

UPS Study of Spirosilane

2003 ◽  
Vol 58 (4) ◽  
pp. 217-219
Author(s):  
Igor Novak ◽  
Branka Kovač
Keyword(s):  
Electronic Structure ◽  
Photoelectron Spectroscopy ◽  
Orbital Degeneracy ◽  
Related Compounds ◽  
Uv Photoelectron Spectroscopy

The electronic structure of 2,7-dimethyl-5-silaspiro[4,4]nona-2,7-diene has been investigated by UV photoelectron spectroscopy (UPS). The analysis of the spectra has been performed by DFT and ROVGF calculations and comparison with the UPS spectra of related compounds. An unusual π-orbital degeneracy in this molecule of C2-symmetry was observed. The spiroconjugation is quenched, and the reasons are discussed.

BBonding in minerals: the application of PAX (photoelectron and X-ray) spectroscopy to the direct determination of electronic structure

1989 ◽  
Vol 53 (370) ◽  
pp. 153-164 ◽  
Author(s):  
David S. Urch
Keyword(s):  
Electronic Structure ◽  
Valence Band ◽  
Photoelectron Spectroscopy ◽  
Direct Determination ◽  
Energy Scale ◽  
X Ray ◽  
Electron Transitions ◽  
Dipole Selection Rule ◽  
The Individual

AbstractX-ray photoelectron spectroscopy can be used to measure the ionization energies of electrons in both valence band and core orbitals. As core vacancies are the initial states for X-ray emission, a knowledge of their energies for all atoms in a mineral enables all the X-ray spectra to be placed on a common energy scale. X-ray spectra are atom specific and are governed by the dipole selection rule. Thus the individual bonding roles of the different atoms are revealed by the fine structure of valence X-ray peaks (i.e. peaks which result from electron transitions between valence band orbitals and core vacancies). The juxtaposition of such spectra enables the composition of the molecular orbitals that make up the chemical bonds of a mineral to be determined.Examples of this approach to the direct determination of electronic structure are given for silica, forsterite, brucite, and pyrite. Multi-electron effects and developments involving anisotropic X-ray emission from single crystals are also discussed.

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