Elementary processes at solid surfaces immersed in low pressure plasmas

2006 ◽  
pp. 69-125 ◽  
Author(s):  
Harold F. Winters
Keyword(s):  
Low Pressure ◽  
Solid Surfaces ◽  
Elementary Processes

Dynamics of Elementary Processes At Surfaces: Nitric Oxide Scattered From A Graphite Surface

1985 ◽  
Vol 51 ◽  
Author(s):  
H. Vach ◽  
J. Häger ◽  
B. Simon ◽  
C. Flytzanis ◽  
H. Walther
Keyword(s):  
Molecular Beam ◽  
Average Energy ◽  
Solid Surfaces ◽  
Energy Distributions ◽  
Vibrationally Excited ◽  
Molecular Beam Scattering ◽  
Elementary Processes ◽  
Beam Scattering ◽  
Powerful Means ◽  
Energy And Momentum

ABSTRACTMolecular beam scattering from solid surfaces has long been recognized as a powerful means for investigation of gas-surface reaction dynamics. With the help of the recently developed laser-induced fluorescence and ionization techniques for state-selective detection, one can now measure the angular and velocity distributions of the scattered molecules together with their internal energy distributions. Such measurements fully describe the average energy and momentum exchanges between molecules and surfaces and give thus full information on the dynamics of the interaction. Recently, also the scattering of vibrationally excited NO molecules was investigated. The paper gives a review of new experiments with emphasis on the investigation of the scattering of NO molecules from a pyrographite surface. A simple model using transport properties of the solid is presented which accounts surprisingly well for the observed features.

Low-pressure adsorption of single gases on heterogeneous solid surfaces

Vacuum ◽  
1982 ◽  
Vol 32 (9) ◽  
pp. 577-583 ◽  
Author(s):  
W Rudziñski ◽  
J Jagietto
Keyword(s):  
Low Pressure ◽  
Solid Surfaces ◽  
Heterogeneous Solid

Coarsening Simulations of Two-Dimensional Islands on Solid Surfaces

1998 ◽  
Vol 528 ◽  
Author(s):  
H. Metiu ◽  
T. R. Mattsson ◽  
G. Mills
Keyword(s):  
Solid Surfaces ◽  
Square Lattice ◽  
Two Dimensional ◽  
Material Transport ◽  
Elementary Processes ◽  
Efficient Simulation ◽  
Metal On Metal

AbstractUsing simulations, we have studied the coarsening of an ensemble of atom-high two-dimensional islands on a square lattice. The parameters are chosen to represent metal-on-metal homogeneous epitaxy. We study first the elementary processes controlling coarsening: the evaporation of atoms from islands of various sizes and the migration of these islands due to material transport along their edges. The information obtained from these preliminary studies is used to produce a very efficient simulation of coarsening. This allows us to study how coarsening modifies the number of islands, the distribution of their sizes, and the positions of the islands on the surface.

Low-pressure adsorption of gases on heterogeneous solid surfaces and the virial description formalism

1985 ◽  
Vol 104 (2) ◽  
pp. 297-310 ◽  
Author(s):  
W Rudziński ◽  
J Jagiełło ◽  
J Michałek ◽  
S Milonjić ◽  
M Kopečni
Keyword(s):  
Low Pressure ◽  
Solid Surfaces ◽  
Adsorption Of Gases ◽  
Heterogeneous Solid

Effect of different elementary processes on the breakdown in low-pressure helium gas

2000 ◽  
Vol 9 (2) ◽  
pp. 183-190 ◽  
Author(s):  
P Hartmann ◽  
Z Donkó ◽  
G Bánó ◽  
L Szalai ◽  
K Rózsa
Keyword(s):  
Low Pressure ◽  
Elementary Processes ◽  
Helium Gas

Activation of diatomic molecules at solid surfaces

2005 ◽  
Vol 363 (1829) ◽  
pp. 955-958 ◽  
Author(s):  
Gerhard Ertl
Keyword(s):  
Active Sites ◽  
Crystal Surface ◽  
Dissociative Adsorption ◽  
Solid Surfaces ◽  
Oxidation Of Co ◽  
Elementary Processes ◽  
Mechanism And Kinetics ◽  
Kinetics Of ◽  
Present Understanding

The interaction of a diatomic molecule with a well-defined single crystal surface represents the prototype of the elementary processes involved in heterogeneous catalysis, and it can be studied down to atomic length and extremely short (fs) time-scales. Our present understanding is illustrated by examples concerning the activation of hydrogen (including also the breakdown of thermal equilibrium during rapid laser-induced associative desorption), the role of steps as ‘active sites’ in the dissociative adsorption of NO or N 2 , and the mechanism and kinetics of the catalytic oxidation of CO.

Effects of Electrical Discharges in Low Pressure Gases on the Morphology of Polyethylene Crystals

1974 ◽  
Vol 32 ◽  
pp. 544-545
Author(s):  
L.H. Bolz ◽  
D.H. Reneker
Keyword(s):  
Power Distribution ◽  
Electrical Discharge ◽  
Dielectric Breakdown ◽  
Ionic Species ◽  
Low Pressure ◽  
Polymer Surfaces ◽  
Electrical Discharges ◽  
Adhesive Bonds ◽  
Power Distribution Lines ◽  
Modification Of The Surface

The attack, on the surface of a polymer, by the atomic, molecular and ionic species that are created in a low pressure electrical discharge in a gas is interesting because: 1) significant interior morphological features may be revealed, 2) dielectric breakdown of polymeric insulation on high voltage power distribution lines involves the attack on the polymer of such species created in a corona discharge, 3) adhesive bonds formed between polymer surfaces subjected to such SDecies are much stronger than bonds between untreated surfaces, 4) the chemical modification of the surface creates a reactive surface to which a thin layer of another polymer may be bonded by glow discharge polymerization.

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