Author/Authors :
Nistor، نويسنده , , L.C. and Ghica، نويسنده , , C. M. Teodorescu، نويسنده , , V.S. and Nistor، نويسنده , , S.V. and Dinescu، نويسنده , , M. and Matei، نويسنده , , D. and Frangis، نويسنده , , N. and Vouroutzis، نويسنده , , N. and Liutas، نويسنده , , C.، نويسنده ,
Abstract :
Hydroxyapatite (HA) thin films has been successfully deposited by Nd:YAG laser ablation at λ = 532 nm. The morphology and microstructure of the deposited layers was studied by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and high resolution electron microscopy (HREM). Polycrystalline HA films were directly obtained with the substrate at 300 °C and without introducing water vapors in the deposition chamber. Electron paramagnetic resonance (EPR) measurements show that the oxygen stoichiometry in the HA films is also maintained. Depositions performed at λ = 335 nm laser wavelength and 300 °C substrate temperature resulted in polycrystalline layers of mixed composition of HA and tricalciumphosphate (TCP).
Keywords :
B. Laser deposition , A. Inorganic material , C. Electron microscopy , D. Crystal structure
