title: Self-assembled structures of hydroxyapatite in the biomimetic coating on a bioinert ceramic substrate.
abstract: 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-Al(2)O(3)) substrate (1cm x 1cm 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: approximately 0.2 microm) structures (length: approximately 375.39 microm and width: 5-6 microm) 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.
authors.affiliation: Bioceramics and Coating Division, Central Glass and Ceramic Research Institute, 196 Raja S.C. Mullick Road, Kolkata, West Bengal, India. jui@cgcri.res.in
authors.forename: Jui
authors.initials: J
authors.lastname: Chakraborty
authors.forename: Soumi Dey
authors.initials: SD
authors.lastname: Sarkar
authors.forename: Saradiya
authors.initials: S
authors.lastname: Chatterjee
authors.forename: Mithlesh Kumar
authors.initials: MK
authors.lastname: Sinha
authors.forename: Debabrata
authors.initials: D
authors.lastname: Basu
mesh_terms: D040761:Biomimetic Materials / Q000737:chemistry*; D002516:Ceramics / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry*; D017886:Durapatite / Q000737:chemistry*; D010316:Particle Size; D017550:Spectroscopy, Fourier Transform Infrared; D013499:Surface Properties; D014961:X-Ray Diffraction
chemical_list: D020099:Coated Materials, Biocompatible; D017886:Durapatite