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The adsorption of diethyldithiophosphate on cuprous sulphide
Author(s) -
Mielczarski J.,
Minni E.
Publication year - 1984
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.740060504
Subject(s) - adsorption , chalcocite , monolayer , chemistry , x ray photoelectron spectroscopy , aqueous solution , layer (electronics) , infrared spectroscopy , ion , molecule , analytical chemistry (journal) , inorganic chemistry , crystallography , chemical engineering , copper , chalcopyrite , organic chemistry , biochemistry , engineering
The adsorption of diethyldithiophosphate (DTP) from its aqueous solutions has been studied on cuprous sulphide (chalcocite) surfaces by measuring the characteristic changes in the positions and relative integrated intensities of C 1s, P 2p, S 2p, O 1s and Cu 2p 3/2 XPS lines and by observing the changes in the in situ internal reflection IR (infrared) spectra at various stages of adsorption. A multistage model is suggested for DTP adsorption on a freshly formed chalcocite surface. During adsorption components preadsorbed on the surface are removed. The DTP ions are initially distributed on the surface without any special orientation but later form islands. The degree of orientation increases with coverage and later, a well oriented close packed monolayer is found. When the adsorption continues beyond this stage the additionally deposited molecules form a randomly oriented layer on the close packed oriented monomolecular layer.