Bonding properties of D-penicillamine and related compounds measured by x-ray photoelectron spectroscopy

1976 ◽  
Vol 48 (1) ◽  
pp. 162-166 ◽  
Author(s):  
C. R. Cothern ◽  
W. E. Moddeman ◽  
R. G. Albridge ◽  
W. J. Sanders ◽  
P. L. Kelly ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray ◽  
Bonding Properties ◽  
Related Compounds

THE BONDING PROPERTIES OF AMORPHOUS CARBON NITRIDE FILMS BY THE MEANS OF X-RAY PHOTOELECTRON SPECTROSCOPY STUDIES

2005 ◽  
Vol 19 (11) ◽  
pp. 1925-1942
Author(s):  
M. RUSOP ◽  
T. SOGA ◽  
T. JIMBO
Keyword(s):  
Amorphous Carbon ◽  
Photoelectron Spectroscopy ◽  
Carbon Nitride ◽  
Measurement Techniques ◽  
Deposition Process ◽  
Atomic Ratio ◽  
X Ray ◽  
Bonding Properties ◽  
Amorphous Carbon Nitride ◽  
Spectroscopy Studies

Amorphous carbon nitride films (a -CN x) were deposited by pulsed laser deposition of camphoric carbon target at different substrate temperatures (ST). The influence of ST on the bonding properties of a -CN x films was investigated. The nitrogen to carbon (N/C) atomic ratio and oxygen to carbon (O/C) atomic ratio, bonding state and microstructure of the deposited a -CN x films were characterized by X-ray photoelectron spectroscopy and confirmed by other standard measurement techniques. The bonding states between the C and N, and C and O in the deposited films are found significantly influenced by the ST during deposition process. The N/C and O/C atomic ratio of the a -CN x films reached the maximum value at 400°C. The ST of 400°C was proposed to promote the desired sp3-hybridized C and the C 3 N 4 phase. The C–N bonding of C–N, C=N and C–N were observed in the deposited a -CN x films.

scholarly journals Site-Specific Electronic Properties of [Ag25(SR)18]- Nanoclusters by X-Ray Spectroscopy

2020 ◽  
Author(s):  
Ziyi Chen ◽  
Andrew Walsh ◽  
xiao wei ◽  
Manzhou Zhu ◽  
Peng Zhang
Keyword(s):  
Electronic Properties ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Xanes Spectrum ◽  
Density Functional Theory Calculations ◽  
Edge Structure ◽  
Site Specific ◽  
X Ray ◽  
Quantum Simulations ◽  
Bonding Properties

We present the site-specific electronic properties of Ag<sub>25</sub>(SR)<sub>18 </sub>and Au<sub>25</sub>(SR)<sub>18</sub> using X-ray spectroscopy experiments and quantum simulations. To overcome the final state effect observed in X-ray photoelectron spectroscopy (XPS), a unique method was developed to reliably analyze the charge transfer behavior of the NCs. Density functional theory calculations were combined with XPS to provide more insight into the electronic properties of the NCs. The differences in the XPS valence bands of these two NCs were further compared and interpreted using the relativistic effect. The first derivative of the X-ray absorption near-edge structure (XANES) spectrum was further used as a tool to sensitively probe the bonding properties of Ag<sub>25</sub>(SR)<sub>18</sub>. By combining the experimental XANES data and their site-specific quantum simulations, the large impact of the staple motif on the bonding properties of the NC was demonstrated. These findings highlight the unique electronic properties of each atomic site in Ag<sub>25</sub>(SR)<sub>18</sub>; the effective X-ray analysis techniques developed here can offer new opportunities for the site-specific study of other NCs.

scholarly journals Site-Specific Electronic Properties of [Ag25(SR)18]- Nanoclusters by X-Ray Spectroscopy

2020 ◽  
Author(s):  
Ziyi Chen ◽  
Andrew Walsh ◽  
xiao wei ◽  
Manzhou Zhu ◽  
Peng Zhang
Keyword(s):  
Electronic Properties ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Xanes Spectrum ◽  
Density Functional Theory Calculations ◽  
Edge Structure ◽  
Site Specific ◽  
X Ray ◽  
Quantum Simulations ◽  
Bonding Properties

We present the site-specific electronic properties of Ag<sub>25</sub>(SR)<sub>18 </sub>and Au<sub>25</sub>(SR)<sub>18</sub> using X-ray spectroscopy experiments and quantum simulations. To overcome the final state effect observed in X-ray photoelectron spectroscopy (XPS), a unique method was developed to reliably analyze the charge transfer behavior of the NCs. Density functional theory calculations were combined with XPS to provide more insight into the electronic properties of the NCs. The differences in the XPS valence bands of these two NCs were further compared and interpreted using the relativistic effect. The first derivative of the X-ray absorption near-edge structure (XANES) spectrum was further used as a tool to sensitively probe the bonding properties of Ag<sub>25</sub>(SR)<sub>18</sub>. By combining the experimental XANES data and their site-specific quantum simulations, the large impact of the staple motif on the bonding properties of the NC was demonstrated. These findings highlight the unique electronic properties of each atomic site in Ag<sub>25</sub>(SR)<sub>18</sub>; the effective X-ray analysis techniques developed here can offer new opportunities for the site-specific study of other NCs.

scholarly journals Effects of Ti, Ni, and Dual Ti/Ni Plasma Immersion Ion Implantation on the Corrosion and Wear Properties of Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 313
Author(s):  
Jun Dai ◽  
Zheng Liu ◽  
Banglong Yu ◽  
Qingdong Ruan ◽  
Paul K. Chu
Keyword(s):  
Magnesium Alloy ◽  
Ion Implantation ◽  
Photoelectron Spectroscopy ◽  
Wear Test ◽  
Corrosion And Wear ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
X Ray ◽  
Bonding Properties ◽  
Plasma Immersion Ion Implantation

Ti, Ni, and Ti/Ni plasma immersion ion implantation is carried out on the AM60 magnesium alloy with a 6 × 1016 ions/cm2 fluence and energy of 35 keV. The corrosion and wear properties of the ion-implanted samples are determined systematically by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, electrochemical methods and wear tests. A Ni-rich layer composed of α-Mg, Ni2O3, and NiTi2 is formed on the surface after dual Ti/Ni ion implantation, and the ion implantation range is approximately 300 nm. The corrosion resistance of the Ni- and Ti/Ni-implanted AM60 samples is significantly reduced in the 3.5% NaCl solution. However, NiTi2 does not adhere well to the grinding ring during the wear test due to the bonding properties, and the sample implanted with both Ti and Ni shows the best wear resistance.

Effects of Bias on Optical and Chemical Bonding Properties of Germanium Carbon Films

2014 ◽  
Vol 881-883 ◽  
pp. 1074-1078
Author(s):  
Xing Sen Che ◽  
Zheng Tang Liu
Keyword(s):  
Radio Frequency ◽  
Deposition Rate ◽  
Chemical Bonding ◽  
Photoelectron Spectroscopy ◽  
Carbon Films ◽  
Graphite Composite ◽  
Composite Target ◽  
X Ray ◽  
Optical Gap ◽  
Bonding Properties

Amorphous hydrogenated Ge1-xCx films are prepared by radio frequency (RF) magnetron cosputtering using Ge/graphite composite target and their composition, optical and chemical bonding properties as a function of bias have been investigated. The results show a decrease in the deposition rate with increasing bias, and the optical gap nearly keep constant due to effects of both composition and chemical bonding. Through the analysis of X-ray photoelectron spectroscopy, we find that the content of Ge-C bonds first increases and then decreases as increasing bias while the Ge-O bond decreases monotonically.

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