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Abstract:
The model system fluorapatite-gelatin allows mimicking the formation
conditions on a lower level of complexity compared to natural dental and
bone tissues. Here, we report on solid-state NMR investigations to
examine the structure of fluorapatite-gelatin nanocomposites on a
molecular level with particular focus on organic-inorganic interactions.
Using P-31, F-19, and H-1 MAS NMR and heteronuclear correlations, we
found the nanocomposite to consist of crystalline apatite-like regions
(fluorapatite and hydroxyfluorapatite) in close contact with a more
dissolved (amorphous) layer containing first motifs of the apatite
crystal structure as well as the organic component. A scheme of the
intergrowth region in the fluorapatite-gelatin nanocomposite, where
mineral domains interact with organic matrix, is presented.
