The adsorption of propyltrimethoxysilane (PTMS) dip-coated onto aluminum oxide substrates has been studied using X-ray photoelectron spectroscopy (XPS). In particular, the influence of solution pH and PTMS concentration upon the initial rate of adsorption has been investigated. While the phenomenon of oscillatory adsorption is observed for all of the experimental conditions investigated, the pH and concentration of the PTMS solution have a significant influence upon the dipping time required to reach the first maximum in surface coverage. The dependence of the observed oscillatory adsorption upon these experimental parameters is consistent with the adsorption mechanism for this system previously described by the authors.
|Number of pages||7|
|Journal||Applied Surface Science|
|Publication status||Published - 2 Nov 1999|