ISSN:
1573-2711
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract For copper, steel, and gold surfaces the chemisorption of stearicacid was found to adsorb via the acid head group, displacingadsorbed contaminants on the surfaces. Tribochemical andthermochemical reactions of stearic acid adsorbed (in air) on acopper surface, were studied by ultra-soft X-ray absorptionspectroscopy above the carbon and oxygen K edges. Chemisorbedstearic acid was found to adsorb in both monodentate andbidentate sites. The bidentate surface configuration wasincreased after the occurrence of the tribochemical reactionsinduced by surface rubbing. When the surface was subjected to avacuum thermal annealing process, a reduction in bidentateconfiguration was observed. Carbon-K-edge X-ray absorptionmeasurements were used to determine the tilt of the alkylmolecular chain from the surface normal, before and after thetribochemical or thermal annealing surface treatments. A stablechemically bonded molecular adsorbed layer persists on thesurface even after these surface treatments. The molecularorientation of the molecules is also generally preserved afterrubbing.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1019109407863
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