Calorimetric studies of ion adsorption at a water/oxide interface. Effects of energetic heterogeneity of real oxide surfaces

Langmuir ◽  
1991 ◽  
Vol 7 (2) ◽  
pp. 354-362 ◽  
Author(s):  
Wladyslaw. Rudzinski ◽  
R. Charmas ◽  
S. Partyka
Keyword(s):  
Oxide Surfaces ◽  
Ion Adsorption ◽  
Oxide Interface ◽  
Energetic Heterogeneity ◽  
Calorimetric Studies ◽  
Interface Effects

scholarly journals On the Nature of the Energetic Surface Heterogeneity in Ion Adsorption at an Electrolyte/Oxide Interface. Theoretical Studies of the Correlations between Binding-to-Surface Energies of Various Surface Complexes

1996 ◽  
Vol 14 (1) ◽  
pp. 25-38 ◽  
Author(s):  
Wladyslaw Rudziński ◽  
Robert Charmas ◽  
Wojciech Piasecki
Keyword(s):  
Surface Heterogeneity ◽  
Ion Adsorption ◽  
Surface Oxygen ◽  
Oxide Interface ◽  
Surface Complexes ◽  
Surface Energies ◽  
Outermost Surface ◽  
Energetic Heterogeneity ◽  
Total Lack ◽  
Oxide Electrolyte

When a metal oxide is brought into contact with an electrolyte, the outermost surface oxygens adsorb one or two protons, a cation or an aggregate composed of two protons and an anion. In this way, various surface complexes are formed. The actual surfaces are, as a rule, geometrically distorted. This causes a variation of the binding-to-surface energy from one surface oxygen to another for each of these complexes. This energetic heterogeneity of the actual oxide surfaces strongly affects the adsorption of ions within the electrical double layer formed at the oxide/electrolyte interface. The way in which the surface heterogeneity affects the adsorption of ions depends on the correlations between the binding-to-surface energies of the various surface complexes. To date, two extreme models have been considered by us; one assuming the existence of very high correlations, and the other one assuming a total lack of correlation between binding-to-surface energies in going from one surface oxygen to another. This paper presents a theoretical study of ion adsorption based on the assumption of a partial correlation between the binding-to-surface energies.

Raman Spectroscopy Measurements of Interface Effects in C60/Copper-Oxide/Copper

2002 ◽  
Vol 734 ◽  
Author(s):  
Y. Li ◽  
J. H. Rhee ◽  
D. Singh ◽  
S. C Sharma
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Copper Oxide ◽  
Thermal Evaporation ◽  
High Vacuum ◽  
Oxide Interface ◽  
Oxide Substrate ◽  
Interface Effects

ABSTRACTWe have investigated interface effects in C60/Cu-oxide/Cu structures. C60 thin films were grown under high vacuum by thermal evaporation and the well-known “pentagonal pinch mode” of C60, Ag(2) band was examined by Raman spectroscopy. We observe Raman-active bands centered at 1420, 1448, 1455, and 1465 cm−1 in C60/Cu-oxide/Cu samples with a thin (∼40 nm) C60 overlayer. The 1420, 1448, and 1455 cm−1 Raman bands are not observed in the spectra of pristine C60 powder, copper-oxide substrate, and C60/Cu-oxide/Cu samples with thick (∼1.3 μm) C60 overlayer. We associate these new Raman-active bands with C60/copper-oxide interface.

Simplification of a model for ion adsorption on oxide surfaces

1982 ◽  
Vol 33 (2) ◽  
pp. 211-217 ◽  
Author(s):  
A. M. POSNER ◽  
N. J. BARROW
Keyword(s):  
Oxide Surfaces ◽  
Ion Adsorption

Ion Adsorption on Metal Oxide Surfaces to Hydrothermal Conditions.

2019 ◽  
Vol 11 (27) ◽  
pp. 167-180 ◽  
Author(s):  
D. J. Wesolowski ◽  
Michael L. Machesky ◽  
Moira K. Ridley ◽  
Donald A. Palmer ◽  
Zhan Zhang ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Oxide Surfaces ◽  
Ion Adsorption ◽  
Hydrothermal Conditions ◽  
Metal Oxide Surfaces
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