Low temperature plasma-assisted chemical vapour deposition of amorphous carbon films for biomedical-polymeric substrates

I. R. McColl, D. M. Grant, Sarah Green, J. V. Wood, T. L. Parker, K. Parker, A. A. Goruppa, N. St J. Braithwaite

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Preliminary results have been obtained on the biocompatibility of amorphous carbon hydrogen (αC:H) coatings deposited on polystyrene. Deposition was carried out at low substrate temperatures using pulsed r.f. plasma-assisted chemical vapour deposition from a methane-hydrogen gas mixture. Cytotoxicity tests using a standard cell line indicate a high degree of biocompatibility. Specifically, αC:H is not toxic to cells, appears to increase cell attachment and affords normal cell growth rates. Wear and other tests have revealed no significant differences between these αC:H coatings and those deposited on a stainless steel at a higher substrate temperature, except for a more pronounced surface texture. However, position in the r.f. plasma was found to be critical for the deposition of good, adherent low temperature coatings.

Original languageEnglish
JournalDiamond and Related Materials
Publication statusPublished - 1 Jan 1994

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