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- Title
Metathetic Reaction in Reverse Micelles: Synthesis of Nanostructured Alkaline-Earth Metal Phosphates.
- Authors
Parhi, Purnendu; Ray, Alok R.; Ramanan, Arunachalam
- Abstract
For the past few years, hydroxyapatite (HAp) has been identified as a potential biomaterial due to its excellent biocompatibility and bioactivity. The preparation of nanostructured HAp with controlled powder characteristics is a pre-requisite for processing it into useful biocomposites. Here, the synthesis of nanorods of calcium hydroxyapatite (Ca-HAp), strontium hydroxyapatite (Sr-HAp), and barium hydroxyapatite (Ba-HAp) by exploiting the metathetic reaction taking place in reverse micelles in the presence of cetyltrimethylammonium bromide has been reported. Powder X-ray diffraction analysis and thermogravimetric measurements confirm the formation of monophasic Ca-HAp and Sr-HAp. The growth of nanorods was further confirmed using transmission electron microscopy studies. The average lengths of Ca-HAp and Sr-HAp were ∼60 and 30 nm, respectively. However, the preparation of Ba-HAp invariably yielded a multiphasic mixture with other competitive phases like BaHPO4 and Ba(H2PO4)2.
- Subjects
REVERSED micelles; ALKALINE earth metals; PHOSPHATES; HYDROXYAPATITE; BIOMEDICAL materials; BIOCOMPATIBILITY; X-ray diffraction
- Publication
Journal of the American Ceramic Society, 2007, Vol 90, Issue 4, p1237
- ISSN
0002-7820
- Publication type
Academic Journal
- DOI
10.1111/j.1551-2916.2007.01508.x