formation of needle like hydroxyl apatite by polyelectrolyte-modified inverse microemulsion technique

in this work needle like hydroxy apatite were synthesized in a reverse microemulsion droplets of water in cyclohexane, separated by a cationic surfactant and co-surfactant, in the presence of na-polyacrylate (paa) as an anionic polyelectrolyte. characterization of the as formed hap nanoparticles at the room temperature were carried out by x-ray diffraction (xrd) and fourier transform infrared spectroscopy (ft-ir). size and morphology of the samples were investigated using scaning and transmission electron microscopy (sem and tem). the results obtained confirm incorperation of paa as a template in controlling of the size and morphology of hap nanoparticles into the individual microemulsion droplets.