ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
The formation of plasma-polymerized materials made from organic molecules is atechnologically attractive way to obtain films with unique properties for life scienceapplications. Surface properties like bio-compatibility, wettability, etc., can be adjusted bytailoring the chemical functionalization. It is well known that after deposition these filmsundergo post-plasma reactions, especially when they are exposed to ambient atmosphere.Most often, in applications these films are not used immediately after their deposition – theyare usually stored for a certain time. Therefore there is a need for a development of analyticalprocedures enabling studies of ageing phenomena of plasma chemically deposited films. Withthe help of these studies a better understanding of basic post-plasma reaction phenomena aswell as relevant empiric information for practical applications can be obtained. However, adetailed chemical characterization of plasma chemically deposited films is a great challengefor the analysts because of the co-existence of a number of different chemical species.We investigated r.f. plasma-polymerized organic films by using photoelectron spectroscopyfor chemical analysis (ESCA), spectroscopy of the near edge X-ray absorption fine structures(NEXAFS) and time-of-flight secondary ion mass spectroscopy (TOF-SIMS). Ethylene,styrene, allyl alcohol and allyl amine were used as monomers. A dedicated plasmapreparation chamber was designed and added to the main analysis chamber of the respectivespectrometer. This approach offers the possibility to study plasma-polymerized films in situand, subsequently, the influence of post-plasma reactions. The important effect of airexposure of the film, in terms of plasma technology denominated as “ageing”, can be studiedsubsequentially step by step by this unique approach
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/14/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.623.pdf
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