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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|Titolo:||Suppression of Hydrophobic Recovery by Plasma Polymer Films with Vertical Chemical Gradients|
|Data di pubblicazione:||2016|
|Citazione:||Suppression of Hydrophobic Recovery by Plasma Polymer Films with Vertical Chemical Gradients / Hegemann, Dirk; Lorusso, Emanuela; Butron-Garcia, Maria-Isabel; Blanchard, Noémi E.; Rupper, Patrick; Favia, Pietro; Heuberger, Manfred; Vandenbossche, Marianne. - In: LANGMUIR. - ISSN 0743-7463. - 32:3(2016), pp. 651-654.|
|Appare nelle tipologie:||1.1 Articolo in rivista|