期刊
LANGMUIR
卷 32, 期 3, 页码 651-654出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b03913
关键词
-
资金
- Swiss National Science Foundation (SNSF, Bern) [IZ73Z0_152661 (SCOPES)]
Vertical chemical gradients extending over a few nanometers were explored. The gradients are based on plasma polymerized oxygen-containing ethylene (ppOEt) films. Using plasma conditions with low CO2/C2H4 ratio and high energy input, cross-linked films were deposited as base layer, while increasing CO2 and lowering energy input resulted in less cross-linked yet highly functional films as applied as top layer. Aging studies indicate that, in particular, for very thin gradient structures, the cross-linked subsurface zone effectively hinders reorientation of the surface functional groups, thus restricting hydrophobic recovery and oxidation effects.
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