Theoretical and experimental X-ray photoelectron spectroscopy investigation of ion-implanted nafion

2003 ◽  
Vol 42 (3) ◽  
pp. 551-556 ◽  
Author(s):  
Eufrozina A. Hoffmann ◽  
Zoltan A. Fekete ◽  
Ljiljana S. Korugic-Karasz ◽  
Frank E. Karasz ◽  
Eugene Wilusz
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray ◽  
Ion Implanted

scholarly journals Microstructure and Mechanical Properties of Ti + N Ion Implanted Cronidur30 Steel

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 427 ◽  
Author(s):  
Jie Jin ◽  
Wei Wang ◽  
Xinchun Chen
Keyword(s):  
Mechanical Properties ◽  
Ion Implantation ◽  
Photoelectron Spectroscopy ◽  
Structural Modification ◽  
Surface Region ◽  
Grazing Incidence ◽  
Bearing Steel ◽  
Near Surface ◽  
X Ray ◽  
Ion Implanted

In this study, Ti + N ion implantation was used as a surface modification method for surface hardening and friction-reducing properties of Cronidur30 bearing steel. The structural modification and newly-formed ceramic phases induced by the ion implantation processes were investigated by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and grazing incidence X-ray diffraction (GIXRD). The mechanical properties of the samples were tested by nanoindentation and friction experiments. The surface nanohardness was also improved significantly, changing from ~10.5 GPa (pristine substrate) to ~14.2 GPa (Ti + N implanted sample). The friction coefficient of Ti + N ion implanted samples was greatly reduced before failure, which is less than one third of pristine samples. Furthermore, the TEM analyses confirmed a trilamellar structure at the near-surface region, in which amorphous/ceramic nanocrystalline phases were embedded into the implanted layers. The combined structural modification and hardening ceramic phases played a crucial role in improving surface properties, and the variations in these two factors determined the differences in the mechanical properties of the samples.

Cell Adhesion to Ion Implanted Titanium

1987 ◽  
Vol 110 ◽  
Author(s):  
K. S. Grabowski ◽  
C. R. Gossett ◽  
F. A. Young ◽  
J. C. Keller
Keyword(s):  
Photoelectron Spectroscopy ◽  
Culture Medium ◽  
Preliminary Investigation ◽  
Surface Concentration ◽  
X Ray ◽  
Commercially Pure ◽  
Fibroblast Adhesion ◽  
Tissue Culture Plate ◽  
Elastic Backscattering ◽  
Ion Implanted

AbstractThis preliminary investigation evaluates the influence of ion implantation on tissue adhesion by measuring the tendency of fibroblasts to attach to the surface of ion implanted Ti. For this work, polished specimens of commercially pure Ti were implanted with ions of Ti, Ca, C, or N to produce a surface concentration of the implanted element up to about 25 at. %. Unimplanted and ASTM treated Ti, and tissue culture plate specimens were prepared as controls. Specimens were sterilized, then exposed for 15 min. to a culture medium containing about 100,000 fibroblasts. The solution and loose fibroblasts were rinsed away and the fibroblasts counted to determine those left attached. The influence of the different implantation protocols on fibroblast adhesion to Ti will be described. Analysis of the structure and composition of the ion implanted surfaces was obtained by scanning electron microscopy, x-ray photoelectron spectroscopy, and elastic backscattering spectrometry of energetic He ions.

scholarly journals Corrosion Behavior and Mechanism of Carbon Ion-Implanted Magnesium Alloy

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 734
Author(s):  
Banglong Yu ◽  
Jun Dai ◽  
Qingdong Ruan ◽  
Zili Liu ◽  
Paul K. Chu
Keyword(s):  
Electron Microscopy ◽  
Magnesium Alloy ◽  
Ion Implantation ◽  
Electron Energy ◽  
Photoelectron Spectroscopy ◽  
Density Functional ◽  
Electronic Density ◽  
Carbon Ion ◽  
X Ray ◽  
Ion Implanted

Carbon ion implantation was conducted on an AM60 magnesium alloy with fluences between 1 × 1016 and 6 × 1016 ions/cm2 and an energy of 35 keV. The microstructure and electrochemical properties of the samples were systematically characterized by X-ray photoelectron spectroscopy, X-ray diffraction, Raman scattering, scanning electron microscopy, transmission electron microscopy, and electrochemical methods. These studies reveal that a 250 nm-thick C-rich layer is formed on the surface and the Mg2C3 phase embeds in the ion-implanted region. The crystal structure of the Mg2C3 was constructed, and an electronic density map was calculated by density-functional theory calculation. The large peak in the density of states (DOS) shows two atomic p orbitals for Mg2C3. The main electron energy is concentrated between −50 and −40 eV, and the electron energy mainly comes from Mg (p) and Mg (s). The electrochemical experiments reveal that the Ecorr is −1.35 V and Icorr is 20.1 μA/cm2 for the sample implanted with the optimal fluence of 6 × 1016 ions/cm2. The sample from C ion implantation gives rise to better corrosion resistance.

Redox and Electrocatalytic Activity of Ni Ion-Implanted Ti

2004 ◽  
Vol 19 (4) ◽  
pp. 1249-1256 ◽  
Author(s):  
M.T. Pham ◽  
M.F. Maitz ◽  
H. Reuther ◽  
E. Richter ◽  
W. Matz ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Surface Film ◽  
Bulk Alloy ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Oxidation Of Glucose ◽  
Redox Conversion ◽  
Ion Implanted

Ni-Ti surface alloy was prepared by ion-implanting Ni into Ti. The surface film was amorphous having a Ni surface content of 10–40 at.%. The material was compared with a Ni-Ti bulk alloy (44.08:55.9) regarding their redox and electrocatalytic behavior in NaOH by cyclic voltammetry. The surface was characterized by x-ray photoelectron spectroscopy, x-ray and electron diffraction, transmission electron microscopy, and atomic force microscopy. The ion-implanted material revealed an enhanced activity toward the redox conversion of Ni(OH)2 ↔ NiOOH and the anodic oxidation of glucose. The effect is discussed considering the enhanced generation of active Ni surface sites from amorphous Ni and the stabilization of higher valence Ni by Ti.

Supersaturated substitutional Ga+ion implanted in silicon studied by x‐ray photoelectron spectroscopy

1989 ◽  
Vol 54 (26) ◽  
pp. 2665-2667 ◽  
Author(s):  
Z. H. Lu ◽  
E. Sacher ◽  
A. Selmani ◽  
A. Yelon
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray ◽  
Ion Implanted

scholarly journals X-RAY PHOTOELECTRON SPECTROSCOPY STUDY OF Fe ION IMPLANTED POLYCRYSTALLINE Al2O3

1991 ◽  
Vol 40 (6) ◽  
pp. 857
Author(s):  
LI SHI-PU ◽  
FAN DONG-HUI ◽  
WANG GUO-MEI ◽  
XING NING ◽  
REN WEI
Keyword(s):  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
Ion Implanted

X-ray photoelectron spectroscopy study on effects of ultra-high-pressure annealing on surface of Mg-ion-implanted GaN

2021 ◽  
Vol 60 (3) ◽  
pp. 036503
Author(s):  
Masamichi Akazawa ◽  
Encheng Wu ◽  
Hideki Sakurai ◽  
Michal Bockowski ◽  
Tetsuo Narita ◽  
...  
Keyword(s):  
High Pressure ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
Ultra High Pressure ◽  
Ion Implanted
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