Surface Science

Items from 1 to 20 out of 44 results

article

Thermodynamic characterization of a methyl chloride film adsorbed on graphite

N. Dupont-Pavlovsky, A. Bah

Surface Science > 1995 > 338 > 1-3 > 293-299

Adsorption isotherms of CH ₃ Cl on the basal planes of graphite have been measured between 130 and 180 K. Results corroborate and complete those of previous studies. The critical temperature of the first layer condensation is estimated to be 173.9 K. A wetting transition at 161.5 K is shown by the appearance of a second adsorbed monolayer.

article

Evidence for two kinetically distinct atomic oxygen species on Ag(110): A molecular beam study of the CO oxidation reaction

H. Conrad, U. Burghaus

Surface Science > 1995 > 338 > 1-3 > l869-l874

Molecular beam titration measurements of CO reacting with preadsorbed atomic oxygen show evidence of two kinetically distinct oxygen species on Ag(110) produced by the dissociation of molecular oxygen at 180 K. The CO ₂ reaction pathways observed at various temperatures (100-200 K) can be rationalized on the basis of an extended Langmuir-Hinshelwood mechanism, which involves a competitive...

article

Adsorption of water on Si(001)-2 1 and Si(111)-7 7 surfaces at 90 and 300 K: A Si 2p core-level and valence band study with synchrotron radiation

F. Rochet, C. Poncey, G. Dufour, H. Roulet, more

Surface Science > 1995 > 338 > 1-3 > 143-156

We have studied by soft X-ray photoemission (hv = 145 eV) the modifications of the Si2p core-level and of the valence band during the adsorption of water on Si(001)-2 1 and Si(111)-77 surfaces, at two substrate temperatures (300 and 90 K). In all cases, water reacts with silicon. We have followed the decay of Si2p and valence-band surface states, as well as the growth of oxidation states, with increasing...

article

{310} faceting of the Ge(001)2 1 surface induced by indium

W.S. Yang, Z. Gai, H. Ji, C. Hu, more

Surface Science > 1995 > 338 > 1-3 > l851-l856

In the present paper, by means of scanning tunneling microscopy, low-energy electron diffraction, and Auger electron spectroscopy, we have found and studied the {310} faceting induced by In on the Ge(001)2 1 surface. On the basis of the dual bias STM images a model, which contains one In atom and only one dangling bond in a unit cell, has been proposed for the atomic structure of the {310} facets...

article

The scattering of Ar from Ag(111): A molecular dynamics study

R.J.W.E. Lahaye, A.W. Kleyn, S. Stolte, S. Holloway

Surface Science > 1995 > 338 > 1-3 > 169-182

A static potential energy surface (PES) for Ar-Ag(111), based upon the local density approximation, is tested in a molecular dynamics study. The PES is a pairwise additive potential and no potential parameters are optimized to fit experimental data. A large crystal with nearest neighbour interaction simulates the solid. Using this PES it is possible to describe the trends of the experimental data...

article

Stochastic simulations of temperature programmed desorption kinetics

F.A. Houle, W.D. Hinsberg

Surface Science > 1995 > 338 > 1-3 > 329-346

In principle, temperature programmed desorption (TPD) can yield a wealth of information on the rates of surface reactions. In practice, however, it is often difficult or impossible to extract such information from the experimental data. We describe an accurate stochastic modelling technique that facilitates the determination of mechanisms and rate constants from TPD measurements. The model for a particular...

article

Changes of the Pt ₃ Co(100) surface stoichiometry with NO adsorption

S.-H. Lee, Y. Okawa

Surface Science > 1995 > 338 > 1-3 > l833-l838

An ordered alloy surface of Pt ₃ Co(100) has been studied by low energy electron diffraction (LEED), Auger electron spectroscopy (AES), thermal desorption spectroscopy (TDS) and temperature programmed reaction (TPR). The clean surface exhibited a c(2 2) LEED structure, when the sample was carefully annealed at temperatures lower than the critical temperature for order-disorder transition...

article

Influence of an adsorbate on the morphology of a vicinal surface: Sulfur on Cu(1 1 11) a STM and helium diffraction study

L. Barbier, L. Masson, J. Cousty, B. Salanon

Surface Science > 1995 > 338 > 1-3 > 60-68

The adsorption of sulfur atoms on Cu(1 1 11) is shown to alter the step mobility and morphology. S atoms are adsorbed preferentially on kink sites, on the upper side of steps. The kink density increases with sulfur coverage and S-decorated kinks are immobile. The mobility of steps is correspondingly reduced although we have seen that the density of bare kinks is also enhanced for low S coverage.

article

Chemisorption of hydrogen on stepped (410) surfaces of Ni and Cu

Q. Sun, J. Xie, T. Zhang

Surface Science > 1995 > 338 > 1-3 > 11-18

The chemisorption of hydrogen on stepped (410) (in step notation, (s)-[4(100) (010)] surfaces of Ni and Cu has been studied using the embedded-atom method (EAM). First, contours of the potential-energy surface (PES) for atomic H on stepped (410) surfaces of Ni, Cu are presented and compared with that of the flat (100) surfaces. It is found that stepped surfaces have more active adsorption sites and...

article

Multilayer adsorption and desorption

H.J. Kreuzer, S.H. Payne

Surface Science > 1995 > 338 > 1-3 > 261-278

A multilayer lattice gas model for adsorption and desorption is formulated and solved using transfer matrix methods. Ramifications of nearest neighbor and next nearest neighbor interactions on equilibrium properties, an the growth modes, and on the desorption kinetics are studied in numerous examples. A variety of adsorbate structures and growth modes is obtained. Mass transfer between the layers...

article

Epitaxial growth of GaSb(111) on Sb(111) by interdiffusion assisted molecular beam epitaxy

R. Sporken, J.-L. Guyaux, R. Caudano, V. Wagner, more

Surface Science > 1995 > 338 > 1-3 > 204-210

GaSb has been grown epitaxially on Sb(111) substrates. Epitaxial growth occurs due to the interdiffusion when gallium is evaporated onto heated Sb substrates. We have studied the influence of the substrate temperature and of the gallium flux on the interdiffusion and the resulting layer quality and stoichiometry by reflection high energy electron diffraction (RHEED), X-ray photoelectron spectroscopy...

article

Reconstruction of the oxygen covered Cu ₃ Au(110) surface investigated by low energy ion back scattering and LEED

K. Morgenstern, G. Comsa, H. Niehus

Surface Science > 1995 > 338 > 1-3 > 1-10

The Cu ₃ Au(110) surface has been investigated by 180° low energy ion scattering spectroscopy in impact collision mode with the detection of noble gas neutrals (NICISS) and low energy electron diffraction (LEED). Oxygen adsorption on the clean surface at room temperature leads to a (2 1) reconstruction. The reconstructed surface no longer contains gold in its topmost layer, but instead copper...

article

Preparation and characterization of ultra-thin iron oxide films on a Mo(100) surface

D.W. Goodman, J.S. Corneille, J.-W. He

Surface Science > 1995 > 338 > 1-3 > 211-224

The synthesis and characterization of ultra-thin films of iron and iron oxides on a Mo(100) surface, have been carried out under ultrahigh vacuum conditions in the 100-1500 K substrate temperature range. The oxides were prepared by both post-oxidation of pure Fe ultra-thin films and by evaporating Fe onto the Mo surface in oxygen ambient (in situ oxidation). The characterization of the iron oxide...

article

Interactions and dynamics of benzene on Cu{111} at low temperature

P.S. Weiss, S.J. Stranick, M.M. Kamna

Surface Science > 1995 > 338 > 1-3 > 41-59

We have used ultrahigh vacuum scanning tunneling microscopy to study the structure and dynamics of benzene on Cu{111} at low coverage and low temperature. We find that at 77 K adsorbed benzene molecules preferentially form two-dimensional (2D) solid structures along Cu substrate step edges while benzene molecules on terraces move freely across the surface as a 2D molecular gas. At the interface between...

article

Laser modifications of Si(100):Cl surfaces induced by surface melting: Etching and cleaning

B. Bourguignon, M. Stoica, B. Dragnea, S. Carrez, more

Surface Science > 1995 > 338 > 1-3 > 94-110

Pulsed laser driven modifications of one Cl monolayer (ML) chemisorbed on Si(100) are studied by time of flight mass spectrometry (TOF) of the desorbed molecules, Auger electron spectroscopy (AES) of the modified surface, and Cl depth profile analysis by secondary ion mass spectrometry (SIMS). The experimental conditions are that of surface melting. Evidence of Cl diffusion to the bulk during surface...

article

Study of surface segregation and surface tension of Sn-Ga solution using AES and sessile drop methods

O.G. Ashkotov, M.V. Zdravomislov

Surface Science > 1995 > 338 > 1-3 > 279-282

Using Auger electron spectroscopy with cylinder mirror analyzer the equilibrium surface concentrations of Sn-Ga liquid solution were measured as function of solution composition and temperature. An excess of Sn at the surface Sn-Ga solutions was found in comparison with the volume concentration. Surface tension and surface concentrations was measured in situ between the melting point and 773 K for...

article

Growth of Mn on Cu(100) studied by STM: The c(2 2) and pgg(4 2) ordered surface alloys

H. Van Kempen, R.G.P. Van der Kraan

Surface Science > 1995 > 338 > 1-3 > 19-30

The structure and growth of manganese on Cu(100) has been studied using scanning tunneling microscopy (STM), Auger electron spectroscopy (AES) and low energy electron diffraction (LEED). Depending on substrate temperature and coverage, either a c(2 2) or a pgg(4 2) ordered surface alloy is formed. Islands are observed after deposition by STM, contrary to other reports. A c(2 2) surface alloy is...

article

Electromagnetic waves in an inhomogeneously polarized layer of adsorbed molecules

S.V. Kriuchenko, Y.V. Demidenko, V.Z. Lozovski

Surface Science > 1995 > 338 > 1-3 > 283-292

Electromagnetic waves in the system @'dielectric substrate-layer of adsorbed molecules@' were considered for the case, when in the adsorbed layer of molecules a periodic polarization structure is formed. For these systems the electrodynamic Green function was found. Dispersion curves for s-and p-polaritons, localized on the surface of the solid with the adsorbed molecular layer were calculated. The...

article

Nanotribology: An UHV-SFM study on thin films of C ₆ ₀ and AgBr

R. Lüthi, E. Meyer, H. Haefke, L. Howald, more

Surface Science > 1995 > 338 > 1-3 > 247-260

We performed scanning force microscopy (SFM) in ultrahigh vacuum (UHV) on C ₆ ₀ and AgBr thin films deposited on NaCl(001) substrates. The morphology of the initial growth stage and the nanotribological properties of these thin films are characterized and discussed. A novel experimental approach is presented where local friction coefficients are determined: the lateral (frictional) forces...

article

Size-mismatch effect on the surface segregation of AuCu ₃ alloys

H.C. Poon, Y.C. Yong

Surface Science > 1995 > 338 > 1-3 > l825-l832

A microscopic electronic theory is presented for the study of surface segregation of transition metal alloys. The total energy is written as a sum of attractive band structure energy and repulsive Born-Mayer-type interaction. The size-mismatch effect is treated within this electronic model instead of being introduced as a parameter. Through minimization of the surface free energy, the equilibrium...

Volume:
338
Year:
1995

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1-3 (44)

Keywords

LOW INDEX SINGLE CRYSTAL SURFACES (9)
SURFACE CHEMICAL REACTION (8)
COPPER (7)
SILICON (7)
AUGER ELECTRON SPECTROSCOPY (6)
LOW ENERGY ELECTRON DIFFRACTION (LEED) (6)
SCANNING TUNNELING MICROSCOPY (6)
SURFACE RELAXATION AND RECONSTRUCTION (6)
SURFACE ELECTRONIC PHENOMENA (5)
SURFACE STRUCTURE (5)
THERMAL DESORPTION SPECTROSCOPY (5)
NICKEL (4)
ALLOYS (3)
COMPUTER SIMULATIONS (3)
DIFFUSION AND MIGRATION (3)
GROWTH (3)
ION-SOLID INTERACTIONS (3)
LOW ENERGY ION SCATTERING (LEIS) (3)
OXIDATION (3)
OXYGEN (3)
STEPPED SINGLE CRYSTAL SURFACES (3)
SURFACE SEGREGATION (3)
ALCOHOLS (2)
AMORPHOUS SURFACES (2)
AROMATICS (2)
CARBON MONOXIDE (2)
CHEMISORPTION (2)
ELECTROCHEMICAL METHODS (2)
EPITAXY (2)
GALLIUM (2)
GRAPHITE (2)
HYDROGEN (2)
IRON (2)
MODELS OF SURFACE KINETICS (2)
MOLECULE-SOLID REACTIONS (2)
NON-EQUILIBRIUM THERMODYNAMICS AND STATISTICAL MECHANICS (2)
NUCLEATION (2)
PLATINUM (2)
SCATTERING (2)
SEMI-EMPIRICAL MODELS AND MODEL CALCULATIONS (2)
SEMICONDUCTING SURFACES (2)
SILVER (2)
SINGLE CRYSTAL SURFACES (2)
SOFT X-RAY PHOTOELECTRON SPECTROSCOPY (2)
SOLID-GAS INTERFACES (2)
SURFACE ROUGHENING (2)
SURFACE THERMODYNAMICS (2)
TUNGSTEN (2)
VIBRATIONS OF ADSORBED MOLECULES (2)
AUCU 3 (1)
GDBA 2 CU 3 O 7 - X (1)
MOS 2 (1)
PT 3 CO(100) (1)
SRTIO 3 (1)
ADATOMS (1)
ADSORPTION ISOTHERMS (1)
ADSORPTION KINETICS (1)
ALKENES (1)
AMORPHOUS THIN FILMS (1)
ANTIMONY (1)
ATOM-SOLID INTERACTIONS (1)
ATOM-SOLID INTERACTIONS, SCATTERING (1)
ATOM-SOLID INTERACTIONS, SCATTERING, DIFFRACTION (1)
AUGER EJECTION (1)
CADMIUM TELLURIDE (1)
CERAMIC THIN FILMS (1)
CHANNELING (1)
CHEMICAL VAPOR DEPOSITION (1)
CHLORINE (1)
CHLOROMETHANE (1)
COMPOUND FORMATION (1)
CYCLE DI- AND TETRA- SILICIC ACIDS (1)
DIFFRACTION (1)
ELECTRICAL TRANSPORT MEASUREMENTS (1)
ELECTRON EMISSION (1)
ELECTRON EMISSION MEASUREMENTS (1)
ELECTRON ENERGY LOS SPECTROSCOPY (1)
ELECTRON ENERGY LOSS SPECTROSCOPY (1)
ELECTRON MICROSCOPY (1)
GALLIUM ANTIMONIDE (1)
GERMANIUM (1)
GLASS SURFACES (1)
GOLD (1)
HALOGENS (1)
INDIUM (1)
INDIUM PHOSPHIDE (1)
INFRARED ABSORPTION SPECTROSCOPY (1)
ION ETCHING (1)
ION-IMPACT ELECTRON SPECTROSCOPY (1)
IRON OXIDE (1)
JELLIUM MODELS (1)
LASER ANNEALING (1)
LASER ETCHING (1)
LASER SURFACE CLEANING (1)
LIQUID SURFACES (1)
MANGANESE (1)
METAL-OXIDE INTERFACE (1)
METALLIC SURFACES (1)
MODELS OF SURFACE CHEMICAL REACTIONS (1)
MODELS OF SURFACES KINETICS (1)
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Surface Science

Thermodynamic characterization of a methyl chloride film adsorbed on graphite

Evidence for two kinetically distinct atomic oxygen species on Ag(110): A molecular beam study of the CO oxidation reaction

Adsorption of water on Si(001)-2 1 and Si(111)-7 7 surfaces at 90 and 300 K: A Si 2p core-level and valence band study with synchrotron radiation

{310} faceting of the Ge(001)2 1 surface induced by indium

The scattering of Ar from Ag(111): A molecular dynamics study

Stochastic simulations of temperature programmed desorption kinetics

Changes of the Pt ₃ Co(100) surface stoichiometry with NO adsorption

Influence of an adsorbate on the morphology of a vicinal surface: Sulfur on Cu(1 1 11) a STM and helium diffraction study

Chemisorption of hydrogen on stepped (410) surfaces of Ni and Cu

Multilayer adsorption and desorption

Epitaxial growth of GaSb(111) on Sb(111) by interdiffusion assisted molecular beam epitaxy

Reconstruction of the oxygen covered Cu ₃ Au(110) surface investigated by low energy ion back scattering and LEED

Preparation and characterization of ultra-thin iron oxide films on a Mo(100) surface

Interactions and dynamics of benzene on Cu{111} at low temperature

Laser modifications of Si(100):Cl surfaces induced by surface melting: Etching and cleaning

Study of surface segregation and surface tension of Sn-Ga solution using AES and sessile drop methods

Growth of Mn on Cu(100) studied by STM: The c(2 2) and pgg(4 2) ordered surface alloys

Electromagnetic waves in an inhomogeneously polarized layer of adsorbed molecules

Nanotribology: An UHV-SFM study on thin films of C ₆ ₀ and AgBr

Size-mismatch effect on the surface segregation of AuCu ₃ alloys

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