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Bonding structure and haemocompatibility of silicon-incorporated amorphous carbon

Zhang, Sam, Du, Hejun, Ong, Soon-Eng, Aung, Kyaw-Naing, Too, Hui-Chin, & Miao, Xigeng (2006) Bonding structure and haemocompatibility of silicon-incorporated amorphous carbon. Thin Solid Films, 515(1), pp. 66-72.

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Abstract

Although silicon doping of amorphous carbon films can lower the intrinsic compressive stress, doping alone cannot ensure a stress free state. An additional thermal processing is needed for complete stress relaxation. This additional process can, however, alter the surface properties of the film and its relative haemocompatibility. In this study, unhydrogenated amorphous carbon film incorporated with silicon was synthesized by magnetron sputtering and annealed to relieve stress. The evolution of the bonding structure and compatibility with blood were investigated. The results showed that the clustering of the sp2-bonded carbon was retarded, and the amorphous network disordering was increased when annealing temperature increased to 600 -C. Surface thrombogenesis of the films were evaluated using in-vitro platelet adhesion assay. The static evaluation of the films incubated in human platelet-rich-plasma showed an increase in the number of adherent platelets, but with lower activation percentage.

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30 citations in Scopus
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26 citations in Web of Science®

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ID Code: 7123
Item Type: Journal Article
Additional Information: For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: x.miao@qut.edu.au
Keywords: Silicon, incorporated unhydrogenated amorphous carbon (a, C(Si)), Magnetron sputtering, Bonding structure, Surface energy, Human platelet adhesion, Haemocompatibility
DOI: 10.1016/j.tsf.2005.12.037
ISSN: 0040-6090
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomaterials (090301)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2006 Elsevier
Deposited On: 24 Apr 2007
Last Modified: 29 Feb 2012 23:25

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