Journal
PLASMA PROCESSES AND POLYMERS
Volume 5, Issue 1, Pages 44-57Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.200700077
Keywords
ageing; glow discharges; plasma polymerization; radio frequency; surface chemistry
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Low-pressure plasma co-polymerisation of binary gas mixtures of ethylene and ammonia was investigated in order to deposit N-rich plasma polymer coatings for biomedical applications. Deposition kinetics and relevant surface characteristics were investigated as a function of r.f. power, gas pressure, and NH3/C2H4 ratio. Physico-chemical properties of the coatings were determined by surface-sensitive techniques: for example, total nitrogen concentrations up to 40 at.-% were measured by XPS, while those of primary amines were determined by chemical derivatisation followed by XPS analysis. L-PPE:N films were further characterised by UV-vis and IR spectroscopic ellipsometry and by CAG.
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