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

研究成果: Conference contribution

抄録

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.

本文言語English
ホスト出版物のタイトルCarbon Nanomaterials
出版社Materials Research Society
ページ193-198
ページ数6
ISBN(印刷版)9781632660985
DOI
出版ステータスPublished - 2013
イベント2012 MRS Fall Meeting - Boston, MA, United States
継続期間: 2012 11 252012 11 30

出版物シリーズ

名前Materials Research Society Symposium Proceedings
1505
ISSN(印刷版)0272-9172

Other

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

ASJC Scopus subject areas

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

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