Anti-bacterial property of hydrogen-free amorphous carbon coatings on Ar plasma-pretreated polytetrafluoroethylene (PTFE) with a-C:H:Finterlayer

Hironari Umemoto, Terumitsu Hasebe, Rumiko Kasai, Yukihiro Yoshimoto, So Nagashima, Atsushi Hotta, Tetsuya Suzuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Amorphous carbon (a-C) films have a growing interest in the biological and medical field, as a coating material, due to their biocompatibility and antibacterial property. However, a-C films deposited directly on polymers often show adhesion failure. In this paper, two types of a-C films, amorphous hydrogenated carbon (a-C:H) film and hydrogen-free a-C (H-free a-C) film were deposited on polytetrafluoroethylene (PTFE) using a plasma deposition method. Prior to a-C film coating, the PTFE substrates were treated with Ar and O 2 plasma and an appropriate interlayer was chosen to enhance the adhesion strength. The effect of the plasma pretreatment on the chemical composition of the PTFE was investigated by X-ray photoelectron spectroscopy (XPS). A T-peel test was carried out to evaluate the adhesion strength of the a-C coated PTFE. In the T-peel test, Ar plasma pretreatment improved the adhesion strength more effectively than that of O2 plasma pretreatment, because of the substantial defluorination and oxygen bonding occurred by Ar plasma pretreatment. Moreover, H-free a-C film reduced the numbers of Escherichia coli (E. coli) colonies dramatically, compared with original PTFE and a-C:H coated PTFE. Consequently, H-free a-C film coating can be a promising method to inhibit the increase of bacteria.

Original languageEnglish
Title of host publicationCarbon Nanomaterials
PublisherMaterials Research Society
Pages193-198
Number of pages6
ISBN (Print)9781632660985
DOIs
Publication statusPublished - 2013 Jan 1
Event2012 MRS Fall Meeting - Boston, MA, United States
Duration: 2012 Nov 252012 Nov 30

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1505
ISSN (Print)0272-9172

Other

Other2012 MRS Fall Meeting
CountryUnited States
CityBoston, MA
Period12/11/2512/11/30

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Umemoto, H., Hasebe, T., Kasai, R., Yoshimoto, Y., Nagashima, S., Hotta, A., & Suzuki, T. (2013). Anti-bacterial property of hydrogen-free amorphous carbon coatings on Ar plasma-pretreated polytetrafluoroethylene (PTFE) with a-C:H:Finterlayer. In Carbon Nanomaterials (pp. 193-198). (Materials Research Society Symposium Proceedings; Vol. 1505). Materials Research Society. https://doi.org/10.1557/opl.2013.526