Results
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