Structure of TiO2 Rutile (110) (1 × 1) from Ion Scattering Measurements

1998 ◽  
Vol 05 (01) ◽  
pp. 309-313 ◽  
Author(s):  
B. Hird ◽  
R. A. Armstrong ◽  
J. A. Seel
Keyword(s):  
Surface Layer ◽  
Sample Preparation ◽  
Preliminary Analysis ◽  
Surface Oxygen ◽  
Ion Scattering ◽  
Oxygen Ion ◽  
Scattering Measurements ◽  
Low Incidence ◽  
Tio2 Rutile ◽  
Oxygen Atoms

9.22 keV oxygen ion scattering has been used to examine the (110) surface structure of TiO 2 rutile. Peaks in the spectrum of the emitted ions at 45° and at 77° are found at the energies expected for O +– Ti and O +– O collisions by surface atoms. Surface preoparation to optimize the 1 × 1 structure involved annealing a previously sputtered surface to 600°C, first in 10-6 Torr of O 2, and then in UHV. Azimuthal and elevation angular variations of the yields for low incidence angles show shadowing effects. Preliminary analysis seems to be consistent with the (1 × 1) model of a complete surface layer, with rows of oxygen atoms above on the titanium bridge sites. The data suggests that our sample preparation produces incomplete rows of above-surface oxygen atoms, or frequent steps.

scholarly journals STUDIES OF SURFACE LAYER ATOMIC STRUCTURE OF Al(100) BY MeV ION SCATTERING

1989 ◽  
Vol 38 (12) ◽  
pp. 1981
Author(s):  
CHENG HUAN-SHENG ◽  
CUI ZHI-XIANG ◽  
XU HONG-JIE ◽  
YAO XIAO-WEI ◽  
YANG FU-JIA
Keyword(s):  
Surface Layer ◽  
Atomic Structure ◽  
Ion Scattering

ULTRATHIN Al FILM ON THE W(100) SURFACE

2009 ◽  
Vol 23 (06) ◽  
pp. 835-847 ◽  
Author(s):  
D. S. CHOI ◽  
D. H. KIM
Keyword(s):  
Surface Layer ◽  
Annealing Temperature ◽  
Low Energy ◽  
Ion Scattering ◽  
Left Hand ◽  
Low Energy Ion Scattering ◽  
Ion Scattering Spectroscopy ◽  
The Right ◽  
Al Adsorption ◽  
Zigzag Structure

We have investigated Al adsorption on the W (100) surface using LEED and low energy Ion Scattering Spectroscopy (ISS). We observe a p(2 × 1) double domain LEED image for the 1.0 ML Al/W (100) surface at annealing temperature 850°C. We also measured the Al adsorption site at the Al/W (100) — p(2 × 1) surface using ISS. It is found that Al atoms adsorbed at 0.7±0.1 Å aside from the center of the bridge sites with a zigzag structure — one atom adsorbs at the right-hand side and next atom at the left-hand side along the [100] direction. The height of the adsorbed Al atoms is determined to be 1.75±0.15 Å above the W surface layer.

INVESTIGATION OF DEFECT INP(001) SURFACE BY THE METHOD OF LOW ENERGY ION SCATTERING

2019 ◽  
Vol 21 (6) ◽  
pp. 356-361
Author(s):  
M. Karimov ◽  
U. Kutliev ◽  
M. Otaboev
Keyword(s):  
Surface Layer ◽  
Defect Structure ◽  
Binary Collision ◽  
Low Energy ◽  
Ion Scattering ◽  
Energy Distributions ◽  
Low Energy Ion Scattering ◽  
Energy Part ◽  
Grazing Scattering ◽  
Collision Approximation

Investigation of grazing scattering of 3 keV Ar+ and Xe+ ions from the defect surface InP(001) are reported. Computer simulations based on the binary collision approximation permit one to carry out a quantitative analysis of data. It is determined that energy distributions of reflected ions directly depend on the defect structure of the topmost surface layer, and these defects form some peaks in low energy part of energy distribution.

Experimental studies of the effect of electrochemical sizing on the contact fatigue of forming rolls

2021 ◽  
Vol 2021 (9) ◽  
pp. 8-10
Author(s):  
Alexander Boldyrev ◽  
Aleksandr Boldyrev ◽  
Vladimir Grigorash ◽  
Vladimir Suhorukov
Keyword(s):  
Surface Layer ◽  
Sample Preparation ◽  
Experimental Studies ◽  
Contact Fatigue ◽  
Comparative Tests ◽  
Operational Characteristics ◽  
Study Results

The study results of the influence of the surface layer of forming rolls on their operational characteristics are presented, the results of comparative tests for contact fatigue of samples machined by grinding and electrochemical sizing are presented, the sequence of sample preparation for experimental studies is considered, recommendations on the choice of final machining method are formulated.

How many surface atoms in Co3O4 take part in oxygen evolution? Isotope labeling together with differential electrochemical mass spectrometry

2017 ◽  
Vol 19 (37) ◽  
pp. 25527-25536 ◽  
Author(s):  
Hatem M. A. Amin ◽  
Helmut Baltruschat
Keyword(s):  
Mass Spectrometry ◽  
Oxygen Evolution ◽  
Isotope Labeling ◽  
Oxygen Exchange ◽  
Exchange Mechanism ◽  
Surface Oxygen ◽  
Differential Electrochemical Mass Spectrometry ◽  
Oxygen Atoms

The outermost oxygen atoms of Co3O4 particles participate in oxygen evolution via a surface oxygen exchange mechanism, as suggested by isotope labeling together with DEMS.

Surface Oxygen Exchange Kinetics in Oxide-Ion Conducting Solids

1992 ◽  
Vol 293 ◽  
Author(s):  
Bernard A. Boukamp ◽  
H.J.M. Bouwmeester ◽  
H. Verweij ◽  
A.J. Burggraaf
Keyword(s):  
Dissociative Adsorption ◽  
Oxygen Exchange ◽  
Surface Oxygen ◽  
Surface Exchange ◽  
Oxygen Ion ◽  
Exchange Kinetics ◽  
Ion Conducting ◽  
Singly Charged ◽  
Rate Limiting ◽  
Ion Conducting Solids

AbstractThe surface oxygen exchange on oxides with high oxygen ion mobility is modelled with a two step reaction with adsorbed mono-atomic oxygen species as intermediate. Interpretation of the Po2 dependence of the exchange rates, following from this model, indicates that these adsorbed oxygen atoms are singly charged.For the stabilized δ-Bi2O3 solid electrolyte a good agreement has been found between the isotope exchange model and the electrochemical study of the oxygen exchange using gold electrodes. For the mixed La-Sr cobaltite perovskite a change in the surface exchange reaction is observed going from room temperature to 600°C. Indications are that above 450°C the bulk exchange is rate limiting with a (Po2)−1 dependence while below this temperature it is assumed that the dissociative adsorption is rate limiting with a (Po2)1/2 dependence.

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