TRANSITION-METAL COMPLEX-DOPED HYDROXYAPATITE LAYERS ON POROUS SILICON

In this work, the encapsulation of the transition metal complexes cis- Pt(NH3)(2)Cl-2, Ru(bpy)(3)(2+), and Ru(phen)(3)(2+) within layers of h ydroxyapatite on a porous Si/Si substrate are described. These;specifi c complexes were selected as a consequence of their biological activit y (cis-Pt(NH3)(2)Cl-2) or polynucleotide binding ability (Ru(bpy)(3)(2 +) and Ru(phen)(3)(2+)). The complex-doped hydroxyapatite/porous Si/Si materials have been characterized by scanning electron microscopy, en ergy-dispersive X-ray spectroscopy, secondary ion mass spectrometry, a nd photoluminescence spectroscopy. It is possible to exercise some con trol of the release of a given complex into the surrounding medium thr ough thermal heating of the complex-doped hydroxyapatite/porous Si/Si structure.