Journal article

A study of the initial film growth of PEG-like plasma polymer films via XPS and NEXAFS

Y Li, BW Muir, CD Easton, L Thomsen, DR Nisbet, JS Forsythe

Applied Surface Science | Published : 2014

Abstract

The chemistry of substrate-film interface (underside) of di(ethylene glycol) dimethyl ether plasma polymer (DGpp) films has been studied directly and compared to the top layer of the film (topside). By depositing the plasma polymer films onto indium tin oxide (ITO) glass, the films were easily delaminated from the substrate. The top- and underside of the films were examined by X-ray photoelectron spectroscopy (XPS) and near edge X-ray absorption fine structure (NEXAFS) spectroscopy. It was found that a rapid increase in pressure during plasma polymerization results in steep chemical gradients in the films, while small pressure changes do not lead to chemical gradient formation. These observa..

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