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Thin film composites of nanocrystalline ZrO2 and diamond-like carbon: Synthesis, structural properties and bone cell proliferation

Paper ID Volume ID Publish Year Pages File Format Full-Text
1207 78 2010 7 PDF Available
Title
Thin film composites of nanocrystalline ZrO2 and diamond-like carbon: Synthesis, structural properties and bone cell proliferation
Abstract

We report on the synthesis of thin composites of diamond-like carbon (DLC) and nanocrystalline ZrO2 deposited using pulsed direct current plasma-enhanced chemical vapor deposition at low temperatures (<120 °C). Films containing up to 21 at.% Zr were prepared (hydrogen was not included in the calculation) and their structural and surface properties were determined using a number of spectroscopic methods and contact angle measurements. Bone cell adhesion to the films was studied using a 3 day cell culture with osteoblasts. These nanocomposites (DLC–ZrO2) consist of tetragonal ZrO2 nanocrystals with an average size of 2–5 nm embedded in an amorphous matrix consisting predominantly of DLC. The surface water contact angle of the films increased from ∼60° to 80° as the Zr content increased from 0 to 21 at.%. The cell culture study revealed that although the cell counts were not significantly different, the morphology of the osteoblasts growing on the DLC–ZrO2 nanocomposites was markedly different from that of cells growing on DLC alone. Cells growing on the DLC–ZrO2 surfaces were less spread out and had a smaller cell area in comparison with those growing on DLC surfaces. In some areas on the DLC–ZrO2 surfaces, large numbers of cells appeared to coalesce. It is postulated that the difference in cell morphology between osteoblasts on DLC–ZrO2 surfaces and DLC surfaces is related to the presence of very small tetragonal nanocrystals of ZrO2 in the composite film.

Keywords
Diamond-like carbon; Zirconia; Nanocomposites; Nanocrystals; Osteoblasts
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Thin film composites of nanocrystalline ZrO2 and diamond-like carbon: Synthesis, structural properties and bone cell proliferation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 6, Issue 10, October 2010, Pages 4154–4160
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us