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Metathetic Reaction in Reverse Micelles: Synthesis of Nanostructured Alkaline‐Earth Metal Phosphates
Author(s) -
Parhi Purnendu,
Ray Alok R.,
Ramanan Arunachalam
Publication year - 2007
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.01508.x
Subject(s) - nanorod , strontium , thermogravimetric analysis , biomaterial , alkaline earth metal , biocompatibility , nuclear chemistry , barium , materials science , micelle , chemical engineering , transmission electron microscopy , metal , chemistry , mineralogy , nanotechnology , metallurgy , organic chemistry , aqueous solution , engineering
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 BaHPO 4 and Ba(H 2 PO 4 ) 2 .