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Morphology and electronic structure of nanoscale powders of calcium hydroxyapatite.

Kurgan N, Karbivskyy V, Kasyanenko V - Nanoscale Res Lett (2015)

Bottom Line: Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined.It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone.The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdymov Institute for Metal Physics of the NAS of Ukraine, blvd. Vernadsky, 36, Kiev, 03680 Ukraine.

ABSTRACT
Atomic force microscopy, infrared spectroscopy and NMR studied morphological and physicochemical properties of calcium hydroxyapatite powders produced by changing the temperature parameters of synthesis. Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined. It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone. The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

No MeSH data available.


AFM image of HAP samples obtained at the temperature of 500°C. There has been an increase in the size of the crystal phase clusters. The particle size is 15 to 20 nm. Image size is 90.0 × 90.0 nm.
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Fig2: AFM image of HAP samples obtained at the temperature of 500°C. There has been an increase in the size of the crystal phase clusters. The particle size is 15 to 20 nm. Image size is 90.0 × 90.0 nm.

Mentions: When the temperature reaches up to 500°C, it shows an increase in the size of the crystal phase clusters. Aspiration systems reduce the surface energy leads to the activation of aggregation processes: coagulation and coalescence of clusters, resulting in an increase in grain size crystal phase. In Figure 2 shows a picture of nanoparticles obtained at 500°C temperature conditions in which the collective process of recrystallization completed.Figure 2


Morphology and electronic structure of nanoscale powders of calcium hydroxyapatite.

Kurgan N, Karbivskyy V, Kasyanenko V - Nanoscale Res Lett (2015)

AFM image of HAP samples obtained at the temperature of 500°C. There has been an increase in the size of the crystal phase clusters. The particle size is 15 to 20 nm. Image size is 90.0 × 90.0 nm.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385053&req=5

Fig2: AFM image of HAP samples obtained at the temperature of 500°C. There has been an increase in the size of the crystal phase clusters. The particle size is 15 to 20 nm. Image size is 90.0 × 90.0 nm.
Mentions: When the temperature reaches up to 500°C, it shows an increase in the size of the crystal phase clusters. Aspiration systems reduce the surface energy leads to the activation of aggregation processes: coagulation and coalescence of clusters, resulting in an increase in grain size crystal phase. In Figure 2 shows a picture of nanoparticles obtained at 500°C temperature conditions in which the collective process of recrystallization completed.Figure 2

Bottom Line: Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined.It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone.The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

View Article: PubMed Central - PubMed

Affiliation: G.V. Kurdymov Institute for Metal Physics of the NAS of Ukraine, blvd. Vernadsky, 36, Kiev, 03680 Ukraine.

ABSTRACT
Atomic force microscopy, infrared spectroscopy and NMR studied morphological and physicochemical properties of calcium hydroxyapatite powders produced by changing the temperature parameters of synthesis. Features of morphology formation of calcium hydroxyapatite nanoparticles with an annealing temperature within 200°C to 1,100°C were determined. It is shown that the particle size of the apatite obtained that annealed 700°C is 40 nm corresponding to the particle size of apatite in native bone. The effect of dimension factor on structural parameters of calcium hydroxyapatite is manifested in a more local symmetry of the PO4 (3-) tetrahedra at nanodispersed calcium hydroxyapatite.

No MeSH data available.