Journal
DIAMOND AND RELATED MATERIALS
Volume 15, Issue 11-12, Pages 1935-1940Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2006.08.024
Keywords
nanocrystalline; diamond; chemical vapor deposition; hemocompatibility; medical implants
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In this study, the microstructural, mechanical, adhesion, and hemocompatibility properties of nanocrystalline diamond coatings were examined. Microwave plasma chemical vapor deposition (MPCVD) was used to deposit nanocrystalline diamond coatings on silicon (100) substrates. The coating surface consisted of faceted nodules, which exhibited a relatively wide size distribution and an average size of 60 nm. High-resolution transmission electron microscopy demonstrated that these crystals were made up of 2-4 nm rectangular crystallites. Raman spectroscopy and electron diffraction revealed that the coating contained both crystalline and amorphous phases. The microscratch adhesion study demonstrated good adhesion between the coating and the underlying substrate. Scanning electron microscopy and energy dispersive X-ray analysis revealed no crystal, fibrin, protein, or platelet aggregation on the surface of the platelet rich plasma-exposed nanocrystalline diamond coating. This study suggests that nanocrystalline diamond is a promising coating for use in cardiovascular medical devices. (c) 2006 Elsevier B.V. All rights reserved.
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