Abstract
A depth profiling method is proposed and an application to a study for cellulose/poly (vinyl alcohol) (PVA) blend films by angular-dependent ESCA is presented. The depth profiling method consists of a two-step fitting of a depth profile function in addition to an employment of a flatlayer model proposed by Pijolat et al., which reduces significantly the error of re-constructed depth profiles from the model profiles. After examining the validity of this method, the method was employed to a depth profiling study of cellulose/PVA films which were cast from dimethyl sulfoxide-tetraethylammonium chloride on a glass plate. It was found that a significant surface enrichment of PVA component was observed on both substrate (glass) faced and free (ethanol faced) surfaces. Substrate dependence was also discussed for the cases of films cast on teflon and low density polyethylene films.
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