Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 18, Issue 15, Pages 2221-2227Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.200800048
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Here, we report a novel biominietic strategy to synthesize hydroxyapatite (HAP) inside of crosslinked gelatin nanoparticles, which serve as a nanoenvironment for crystal growth in the aqueous phase. The synthesis of gelatin nanoparticles with the inverse miniemulsion technique is very intriguing because of the flexibility offered by the technique in tailoring the properties of the gelatin nanoparticles. it can be shown that the nanoenvironment promotes a different growth environment for the crystal because of the confinement inside the particle. The formation of HAP inside the particles follows Ostwald's rule of stages. At first ail amorphous phase is formed, which itself has a great potential to be used as a resorbable bone substitute. This further transforms into single crystalline HAP via an octacalcium phosphate intermediate. The solution-mediated transformation into the HAP phase without any calcination step is studied in detail using transmission electron microscopy (TEM) and X-ray diffraction (XRD) measurements.
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