TU Darmstadt / ULB / TUbiblio

Electrochemical determination of corrosion protection ability of fullerene thin films treated by radiofrequency plasma

Sittner, F. and Enders, B. and Ensinger, W. :
Electrochemical determination of corrosion protection ability of fullerene thin films treated by radiofrequency plasma.
[Online-Edition: http://dx.doi.org/10.1016/j.tsf.2003.12.096]
In: Thin Solid Films, 459 (1-2) pp. 233-236. ISSN 00406090
[Article] , (2004)

Official URL: http://dx.doi.org/10.1016/j.tsf.2003.12.096

Abstract

Fullerenes were deposited on iron substrates via thermal evaporation under high vacuum conditions at room temperature. After deposition the samples were subjected to ion irradiation from a radiofrequency plasma with the samples held at room temperature. The gases used for irradiation were argon and nitrogen, respectively. The process leads to an opening of the fullerene cage structure and forms an extended network of amorphous carbon in the upper region of the fullerene layer. Changes in the structure of the films due to the treatment were analyzed by Raman spectroscopy. In order to determine the porosity of as-deposited and post-deposition treated fullerene films, electrochemical polarization measurements were carried out in aqueous corrosive environment. Thus the dissolution current of the iron substrate through the films was measured. The results show that plasma treatment leads to formation of amorphous carbon with a considerably lower porosity than the fullerene film. Hence, ion irradiation improves the coverage of the film and its corrosion protection ability.

Item Type: Article
Erschienen: 2004
Creators: Sittner, F. and Enders, B. and Ensinger, W.
Title: Electrochemical determination of corrosion protection ability of fullerene thin films treated by radiofrequency plasma
Language: English
Abstract:

Fullerenes were deposited on iron substrates via thermal evaporation under high vacuum conditions at room temperature. After deposition the samples were subjected to ion irradiation from a radiofrequency plasma with the samples held at room temperature. The gases used for irradiation were argon and nitrogen, respectively. The process leads to an opening of the fullerene cage structure and forms an extended network of amorphous carbon in the upper region of the fullerene layer. Changes in the structure of the films due to the treatment were analyzed by Raman spectroscopy. In order to determine the porosity of as-deposited and post-deposition treated fullerene films, electrochemical polarization measurements were carried out in aqueous corrosive environment. Thus the dissolution current of the iron substrate through the films was measured. The results show that plasma treatment leads to formation of amorphous carbon with a considerably lower porosity than the fullerene film. Hence, ion irradiation improves the coverage of the film and its corrosion protection ability.

Journal or Publication Title: Thin Solid Films
Volume: 459
Number: 1-2
Publisher: Elsevier
Uncontrolled Keywords: Ion beam, Fullerene, Corrosion, Iron, Amorphous carbon, Thin films, Raman spectroscopy
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
Date Deposited: 06 Sep 2012 07:52
Official URL: http://dx.doi.org/10.1016/j.tsf.2003.12.096
Identification Number: doi:10.1016/j.tsf.2003.12.096
Export:

Optionen (nur für Redakteure)

View Item View Item