The initial sticking coefficient of hydrogen on sulfur- and oxygen-covered polycrystalline nickel surfaces

1978 ◽  
Vol 74 (1) ◽  
pp. 318-320 ◽  
Author(s):  
K.D. Rendulic ◽  
A. Winkler
Keyword(s):  
Sticking Coefficient ◽  
Polycrystalline Nickel ◽  
Initial Sticking

Energy and angle dependence of the initial sticking coefficient of O2 on Ag(001)

1996 ◽  
Vol 363 (1-3) ◽  
pp. 68-72 ◽  
Author(s):  
F.Buatier de Mongeot ◽  
M. Rocca ◽  
U. Valbusa
Keyword(s):  
Sticking Coefficient ◽  
Angle Dependence ◽  
Initial Sticking

Initial sticking coefficient of O2 on Ag (001)

1990 ◽  
Vol 54-55 ◽  
pp. 131-141 ◽  
Author(s):  
M. Rocca ◽  
P. Traversaro ◽  
U. Valbusa
Keyword(s):  
Sticking Coefficient ◽  
Initial Sticking

Initial sticking coefficient of O2 on Ag(110)

1994 ◽  
Vol 101 (1) ◽  
pp. 713-725 ◽  
Author(s):  
L. Vattuone ◽  
M. Rocca ◽  
C. Boragno ◽  
U. Valbusa
Keyword(s):  
Sticking Coefficient ◽  
Initial Sticking

OXYGEN AND POTASSIUM ADSORPTION ON A CARBIDE-MODIFIED STEPPED-W(100) IN CONTACT WITH THE CARBON SOLID SOLUTION: AN AES AND WF STUDY AT 300 K AND AT ELEVATED TEMPERATURES

2005 ◽  
Vol 12 (05n06) ◽  
pp. 787-792
Author(s):  
S. D. FOULIAS ◽  
A. PERDIKIS ◽  
D. VLACHOS
Keyword(s):  
Solid Solution ◽  
Elevated Temperatures ◽  
Dissociative Adsorption ◽  
Dispersed Phase ◽  
Phase System ◽  
Sticking Coefficient ◽  
Two Phase ◽  
Metallic Behavior ◽  
Initial Sticking ◽  
Carbon System

The adsorption of oxygen and potassium on the two-phase system: carbide-modified stepped- W (100) surface (CMT) in contact with the solid solution of carbon in bulk tungsten, was investigated by AES and WF measurements. The CMT surface shows metallic behavior judging from its interaction with K . The expected dissociative adsorption of oxygen appears to occur with 1 - θ kinetics, possibly via a molecularly chemisorbed state. The "dispersed phase — two-phase" model is clearly applicable when oxygen adsorbs on the K -pre-covered carbide. The initial sticking coefficient of oxygen increases drastically from the dispersed to the condensed phase, at least four-fold with respect to s0 on the clean carbide. It is proposed that this two-phase carbon system can be advantageous compared with the bulk carbide since it can easily regenerate the surface if the latter is depleted from carbon.

scholarly journals Initial Sticking Coefficient of H2 on the Pd–Cu(111) Surface Alloy at very Low Coverages

2013 ◽  
Vol 0 (0) ◽  
pp. 1-10
Author(s):  
Daniel Farías ◽  
Marina Minniti ◽  
Amjad Al Taleb ◽  
Rodolfo Miranda
Keyword(s):  
Surface Alloy ◽  
Sticking Coefficient ◽  
Initial Sticking

ETHYLENE REACTIVITY WITH SILICON SURFACE

2004 ◽  
Vol 11 (01) ◽  
pp. 21-25 ◽  
Author(s):  
M.-A. ZAÏBI ◽  
J.-P. LACHARME
Keyword(s):  
Silicon Surface ◽  
Auger Electron ◽  
Low Energy ◽  
Second Step ◽  
Sticking Coefficient ◽  
Low Energy Electron Diffraction ◽  
Low Energy Electron ◽  
Electron Spectrometry ◽  
Property Changes ◽  
Initial Sticking

The clean Si (111)(7×7) surface has been exposed to ethylene ( C 2 H 4) doses, up to 7000 L (1 L =10-6 Torr ×1 s ) at most, under ultrahigh vacuum. The structural and electronic property changes of the surface have been studied by low energy electron diffraction (LEED), Auger electron spectrometry (AES) and photoemission yield spectroscopy (PYS). The interaction presents two types of kinetic adsorption, where the first is produced below 3000 L of C 2 H 4. In the first step, the ethylene molecule is adsorbed molecularly and the initial sticking coefficient S 0 is very low (S0≈2×10-3). At the saturation (≈ 5000–6000 L), the valence band is fitted by a power law (E — 4.42)2.5 eV .1,2 The surface is then a stronger scattering for photoemitted electrons. We attribute this result, produced at the second step of adsorption, to the C 2 H 4-π orbital and hydrogen liberated by this molecule, which break the Si – Si surface bonds.

Initial Sticking Coefficient of H2 on the Pd–Cu(111) Surface Alloy at very Low Coverages

2013 ◽  
Vol 227 (9-11) ◽  
Author(s):  
Daniel Farías ◽  
Marina Minniti ◽  
Amjad Al Taleb ◽  
Rodolfo Miranda
Keyword(s):  
Surface Alloy ◽  
Sticking Coefficient ◽  
Initial Sticking

Voids in Quenched Nickel

1968 ◽  
Vol 26 ◽  
pp. 266-267
Author(s):  
J. J. Laidler
Keyword(s):  
Electron Beam ◽  
Ambient Temperature ◽  
Cooling Rate ◽  
Three Dimensional ◽  
Cooling Curve ◽  
Polycrystalline Nickel ◽  
Quenching Temperature ◽  
Long Tail ◽  
Diffusion Pump

The presence of three-dimensional voids in quenched metals has long been suspected, and voids have indeed been observed directly in a number of metals. These include aluminum, platinum, and copper, silver and gold. Attempts at the production of observable quenched-in defects in nickel have been generally unsuccessful, so the present work was initiated in order to establish the conditions under which such defects may be formed.Electron beam zone-melted polycrystalline nickel foils, 99.997% pure, were quenched from 1420°C in an evacuated chamber into a bath containing a silicone diffusion pump fluid . The pressure in the chamber at the quenching temperature was less than 10-5 Torr . With an oil quench such as this, the cooling rate is approximately 5,000°C/second above 400°C; below 400°C, the cooling curve has a long tail. Therefore, the quenched specimens are aged in place for several seconds at a temperature which continuously approaches the ambient temperature of the system.

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