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Carbon spheres assisted synthesis of porous bioactive glass containing hydroxycarbonate apatite nanocrystals: A material with high invitro bioactivity

Jagadeesan, Dinesh and Deepak, C and Siva, Kavitha and Inamdar , Maneesha and Eswaramoorthy, Muthusamy (2008) Carbon spheres assisted synthesis of porous bioactive glass containing hydroxycarbonate apatite nanocrystals: A material with high invitro bioactivity. J. Phys. Chem. C, 112 (19). pp. 7379-7384.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp800850m

Abstract

A hierarchically porous bioactive glass of composition 80 mol % SiO2 and 15 mol % CaO (MBGH) was synthesized using pluoronic P123 and glucose-derived amorphous carbon spheres as templates. While the carbon spheres leave behind pores of 300 nm to a few micrometers after calcination, the walls of these pores contain orderly arranged mesopores of 3−5 nm orchestrated by the pluoronic polymer. The role of carbon spheres is not only to create pores but also to aid in increased growth rate of hydroxycarbonate apatite in simulated body fluid (SBF). The negatively charged carbon spheres favor the local enrichment of calcium ions and facilitate the formation of amorphous calcium phosphate around the surface. On calcination, the walls of the macropores contain crystalline hydroxycarbonate apatite nuclei. MBGH also exhibits an accelerated growth of monoclinic-like apatite in SBF. The in vitro activity has been studied by XRD, FT-IR, FESEM, and TEM.

Item Type:Article
Subjects:Material Science > Bio materials
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:3871
Deposited By:JNCASR
Deposited On:27 Jan 2009 09:44
Last Modified:02 Mar 2009 09:11

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