Si2p Core Level Absorption and Photoemission Spectra of Porous Si

1992 ◽  
Vol 283 ◽  
Author(s):  
Hisao Nakashima ◽  
Koichi Inoue ◽  
Kenzo Maehashi
Keyword(s):  
Synchrotron Radiation ◽  
Electronic Structures ◽  
Energy Shift ◽  
Blue Shift ◽  
Photo Luminescence ◽  
High Energy ◽  
Core Level ◽  
Oxidation States ◽  
Porous Si ◽  
The Core

ABSTRACTSi2p core level absorption and photoemission spectra are taken for different porous Si layers using synchrotron radiation, toknow the electronic structures of porous Si. The core level absorption spectra show the high energy shift of the conduction band which correlates with the photo-luminescence blue shift. The oxidation states of porous Si are clarified from the photoemission spectra.

Chemistry and Deposition Driven by Monoenergetic Synchrotron Radiation: Initial Studies of Condensed Silanes and Water on Noble Metals

1994 ◽  
Vol 354 ◽  
Author(s):  
J.F. Moore ◽  
Sanjay Chaturvedi ◽  
DR. Strongest
Keyword(s):  
Synchrotron Radiation ◽  
Energy Dependence ◽  
Noble Metals ◽  
Core Level ◽  
The Core ◽  
Two Systems

AbstractWe extend previous work in broadband synchrotron radiation (SR) excitation of condensed multilayers to the study of reactions driven by monoenergetic SR. The long term goal of this work is to understand the importance of core-level excitation on the reactions that lead to materials growth. Results are presented for two systems of interest: formation of silica from Si(CH3)4 and H20 mixtures with 90 eV irradiation (below the core levels) and the energy dependence of the reaction of SiH4 and H2O.

scholarly journals Recent progress in Cr-based catalysts for oxidative dehydrogenation of light alkanes by employing CO2 as a soft oxidant

Clean Energy ◽  
2021 ◽  
Vol 5 (4) ◽  
pp. 623-633
Author(s):  
Pengyu Liu ◽  
Lina Zhang ◽  
Minkang Li ◽  
Nannan Sun ◽  
Wei Wei
Keyword(s):  
Oxidative Dehydrogenation ◽  
Electronic Structures ◽  
Development Trend ◽  
Catalytic Performance ◽  
Oxidation States ◽  
Light Alkanes ◽  
The Core ◽  
Structure Activity ◽  
Soft Oxidant ◽  
Excellent Catalytic Performance

Abstract CO2 can be used as a soft oxidant for oxidative dehydrogenation of light alkanes (CO2-ODH), which is beneficial to realize the reuse of CO2 and meet the demand for olefins. The core of this reaction is the catalyst. Cr-based catalysts have attracted much attention for their excellent catalytic performance in CO2-ODH reactions due to their various oxidation states and local electronic structures. In this paper, the synthesis and modification methods of Cr-based catalysts for CO2-ODH are reviewed. The structure–activity relationship and reaction mechanism are also summarized. Moreover, the reasons for the deactivation of Cr-based catalysts are analysed and the main challenges faced by Cr-based catalysts in the CO2-ODH process, as well as the future development trend and prospect, are discussed.

HIGH RESOLUTION CORE LEVEL SPECTROSCOPY AT THE Cu/Ru(0001) INTERFACE

2002 ◽  
Vol 09 (02) ◽  
pp. 723-727 ◽  
Author(s):  
T. H. ANDERSEN ◽  
L. BECH ◽  
J. ONSGAARD ◽  
S. V. HOFFMANN ◽  
Z. LI
Keyword(s):  
High Resolution ◽  
Synchrotron Radiation ◽  
Binding Energy ◽  
Energy Shift ◽  
Core Level ◽  
Photoemission Spectroscopy ◽  
Copper Adsorption ◽  
X Ray ◽  
Level Shifts ◽  
Binding Energy Shift

Copper adsorption on Ru(0001) has been studied by synchrotron radiation. The clean Ru 3d 5/2 spectra were found to consist of two components with a binding energy shift of 400 meV. The component with the lower binding energy represents the first layer of ruthenium atoms. Adsorption of copper gives rise to core level shifts of the Ru 3d 5/2 components, which were studied as a function of Cu coverage. Experiments were carried out with copper coverages varying from the submonolayer range up to two monolayers of copper. The binding energy of the Cu 2p 3/2 level was measured by X-ray photoemission spectroscopy.

Electronic Structures of Porous Si Studied by Core-Level Absorption and Photoemission Spectroscopy

1993 ◽  
Vol 32 (Part 2, No. 3B) ◽  
pp. L361-L364 ◽  
Author(s):  
Koichi Inoue ◽  
Kenzo Maehashi ◽  
Hisao Nakashima
Keyword(s):  
Electronic Structures ◽  
Core Level ◽  
Photoemission Spectroscopy ◽  
Porous Si

scholarly journals Effects of Accumulated Energy on Nanoparticle Formation in Pulsed-Laser Dewetting of AgCu Thin Films

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
H. K. Lin ◽  
C. W. Huang ◽  
Y. H. Lin ◽  
W. S. Chuang ◽  
J. C. Huang
Keyword(s):  
Pulsed Laser ◽  
Blue Shift ◽  
High Energy ◽  
Low Energy ◽  
Nanoparticle Formation ◽  
Energy Accumulation ◽  
Glass Substrates ◽  
Peak Absorption ◽  
Two Peaks ◽  
Sputtering System

AbstractAg50Cu50 films were deposited on glass substrates by a sputtering system. Effects of accumulated energy on nanoparticle formation in pulse-laser dewetting of AgCu films were investigated. The results showed that the properties of the dewetted films were found to be dependent on the magnitude of the energy accumulated in the film. For a low energy accumulation, the two distinct nanoparticles had rice-shaped/Ag60Cu40 and hemispherical/Ag80Cu20. Moreover, the absorption spectra contained two peaks at 700 nm and 500 nm, respectively. By contrast, for a high energy accumulation, the nanoparticles had a consistent composition of Ag60Cu40, a mean diameter of 100 nm and a peak absorption wavelength of 550 nm. Overall, the results suggest that a higher Ag content of the induced nanoparticles causes a blue shift of the absorption spectrum, while a smaller particle size induces a red shift.

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