Scanning electron microscope micrographs of the surface of the original polycrystalline hydroxyapatite: (a) surface morphology of a region and (b) the central region expanded.
TEM micrographs of hydroxyapatite nanoparticles: (a) individual nanoparticles and (b) a cluster of nanoparticles
XPS spectra of nanoparticles and the original hydroxyapatite for the (a) , (b) , (c) , and (d) lines. The “” line is from the target and the “” line is from the nanoparticles.
Raman spectra of the ablated nanoparticles and the original polycrystalline hydroxyapatite. The acquisition time for the Raman spectrum of the target was 1 min and for the nanoparticles was 10 min.
Estimated time dependence of temperature at the surface and 100 nm below the surface of hydroxyapatite under constant illumination.
The observed Raman-active peaks of the starting hydroxyapatite, the ablated particles and previously reported data (Refs. 23 and 24).
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