Chakraborty, Jui and Dey Sarkar, Soumi and Chatterjee, Saradiya and Sinha, Mithlesh Kumar and Basu, Debabrata (2008) Self-assembled structures of hydroxyapatite in the biomimetic coating on a bioinert ceramic substrate. COLLOIDS AND SURFACES B-BIOINTERFACES, 66 (2). pp. 295-298. ISSN 0927-7765

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The tribological properties of alumina ceramic are excellent due in part to a high wettability because of the hydrophilic surface and fluid film lubrication that minimizes the adhesive wear. Such surfaces are further modified with bioactive glass/ceramic coating to promote direct bone apposition in orthopedic applications. The present communication reports the biomimetic coating of calcium hydroxyapatite (HAp) on dense (2-3% porosity) alumina (alpha-Al2O3) substrate (1 cm x 1 cm x 0.5 cm), at 37 degrees C. After a total period of 6 days immersion in simulated body fluid (SBF), at 37 degrees C, linear self-assembled porous (pore size: similar to 0.2 mu m) structures (length: similar to 375.39 mu m and width: 5-6 mu m) of HAp were obtained. The phenomenon has been demonstrated by self-assembly and diffusion-limited aggregation (DLA) principles. Structural and compositional characterization of the coating was carried Out using SEM with EDX facility, XRD and FT-IR data. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: ceramics; surfaces; electron microscopy; microstructure; diffusion
Subjects: Ceramic-Metal Systems
Depositing User: Bula Ghosh
Date Deposited: 17 Jan 2012 07:43
Last Modified: 17 Jan 2012 07:43

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