Fabrication and characterization of fluoridated hydroxyapatite nanopowders via mechanical alloying

Fathi, Mohammadhossein; Zahrani, E. Mohammadi

doi:10.1016/j.jallcom.2008.07.058

Cited by 96 publications

(52 citation statements)

References 34 publications

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“…Moreover, a and c values of FHA0 compounds were in good agreement with those of a = 9.4155 Å and c = 6.881 Å , [46] a = 9.422 Å and c = 6.884 Å , [9] a = 9.419 Å and c = 6.884 Å , [28] a = 9.418 Å and c = 6.884 Å , [47] and a = 9.414 Å and c = 6.881 Å . [48] The measured lattice constant values of FHA100 were in excellent agreement with the other reports: a = b = 9.3716 Å and c = 6.884 Å , [46] a = b = 9.370 Å and c = 6.882 Å , [48] and a = b = 9.364 Å and c = 6.884 Å . [42] The lattice constant of the Ca 10 (PO 4 ) 6 (OHF), synthesized via the precipitation method, [9] was equal to a = b = 9.39 Å and c = 6.882 Å , which are close to the lattice constant values for FHA50 in the present work.…”

Section: Structural Characterizationsupporting

confidence: 88%

“…All patterns were the characteristic patterns of carbonated apatite, as discussed in another report. [48] At each spectrum, no other peaks that would come from extraneous substitution of functional groups were observed, and each of the synthesized nanopowders was characteristic of apatite compounds. With regard to the carbonates (CO 3 2-), the band centered at 869 cm À1 for v 2 and a doublet at 1470 and 1429 cm À1 for v 3 were visible in the spectra.…”

Section: E Fourier Transform Infrared Analysismentioning

confidence: 91%

See 1 more Smart Citation

Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications

Zahrani

Fathi

Alfantazi

2010

Metall Mater Trans A

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Nanocrystalline fluoridated hydroxyapatite (FHA) powders and coatings with a chemical composition of Ca 10 (PO 4 ) 6 OH 2-x F x (where x values were selected equal to 0.0 ,0.5, 1.0, 1.5, and 2.0) were prepared through a modified simple sol-gel technique in comparison with conventional alkoxide-based sol-gel route. X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), fourier transform infrared (FTIR) spectroscopy, pF-meter with a fluorine-sensitive electrode, and inductively coupled plasma-optical emission spectroscopy (ICP-OES) analysis techniques were employed in order to evaluate phase composition, particle size distribution, morphology, functional groups, fluorine content, and purity of prepared FHA nanopowders, respectively. SEM analysis was used to study the surface morphology and cross section of the FHA coatings, deposited on 316L stainless steel substrate. Results indicated that single-phase and homogeneous FHA nanopowders with carbonate peaks in the FTIR spectrum were synthesized through the modified sol-gel technique. TEM analysis revealed that fluorapatite (FA) powder was composed of nanosized particles,~25 nm in size, with polyhedron shape and straight corners. In the modified sol-gel technique, polymerization and gelation kinetic of the sol were significantly improved without any need to use additives or pH control. Uniform, dense, well-adhered, and compacted FHA coatings were formed on the 316L stainless steel substrate after 24 hours of aging.

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Section: Structural Characterizationsupporting

confidence: 88%

Section: E Fourier Transform Infrared Analysismentioning

confidence: 91%

Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications

Zahrani

Fathi

Alfantazi

2010

Metall Mater Trans A

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“…The slight shift of characteristic diffraction reflex of hydroxyapatite (HA)to higher 2h was related to a decrease in a-axis length of the hexagonal HA crystals lattice. As mentioned before, it was the lower ionic radius of F -1 rather than OH -1 that caused distortion in the lattice with 25-50 % substitution instead of the hydroxyl groups [8,13,15,18,19].…”

Section: Phase Structure Analysismentioning

confidence: 74%

“…According to Eq. (5), the typical reflections of P 2 O 5 could not be detected, because P 2 O 5 possessed highly hydrophilic character, leading to the immediate formation of phosphoric acid [15]. …”

Section: Phase Structure Analysismentioning

confidence: 99%

Synthesis and Characterization of Fluorapatite Nanoparticles Via a Mechanochemical Method

2014

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Nanosized F-substituted hydroxyapatite (FA; Ca 10 (PO 4 ) 6 (OH) 2 -x F x ) was synthesized with CaCO 3 , P 2 O 5 and CaF 2 as a precursor via a mechanochemical process. Different times of milling (10 min, 2, 4, 6, 8, 10, 12 and 14 h) and fluorine ion contents (0, 25, 50, 75 and 100 percent of substitution) were used to prepare the products. Transmission electron microscopy (TEM) analysis demonstrated that FA nanoparticles with an average diameter of 15-30 nm (at milling time of 10 h) were prepared. Finally, the bioactivity of optimal samples was investigated in simulated body fluid (SBF).

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“…Most of these techniques produced rod-like crystals or whiskers, while plate-like shapes were obtained in just a few studies [335,345,347]. Other preparation methods of nanodimensional and/or nanocrystalline apatites of various states, shapes and sizes include sol-gel [30,188,231,232,270,328,[360][361][362][363][364][365][366][367][368][369][370][371][372][373][374][375][376], co-precipitation [271,333,334,[377][378][379][380], mechanochemical approach[65, 250,343,348,[381][382][383][384][385][386][387], mechanical alloying [388,389], ball milling [348,383,…”

Section: Nanodimensional and Nanocrystalline Apatitesmentioning

confidence: 99%

Nanodimensional and Nanocrystalline Calcium Orthophosphates

Dorozhkin¹

2012

AJBE

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Nano-sized particles and crystals play an important role in the formation of calcified tissues of various animals. For example, nano-sized and nanocrystalline calcium orthophosphates in the form of apatites of biological origin represent the basic inorganic building blocks of bones and teeth of mammals. Namely, according the recent developments in biomineralization, tens to hundreds nanodimensional crystals of a biological apatite are self-assembled into these complex structures. This process occurs under a strict control by bioorganic matrixes. Furthermore, both a greater viability and a better proliferation of various types of cells have been detected on smaller crystals of calcium orthophosphates. Thus, the nano-sized and nanocrystalline forms of calcium orthophosphates have a great potential to revolutionize the hard tissue-engineering field, starting from bone repair and augmentation to controlled drug delivery systems. This review reports on current state of the art and recent developments on the subject, starting from synthesis and characterization to biomedical and clinical applications. Furthermore, the review also discusses possible directions for future research and development.

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Fabrication and characterization of fluoridated hydroxyapatite nanopowders via mechanical alloying

Cited by 96 publications

References 34 publications

Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications

Sol-Gel Derived Nanocrystalline Fluoridated Hydroxyapatite Powders and Nanostructured Coatings for Tissue Engineering Applications

Synthesis and Characterization of Fluorapatite Nanoparticles Via a Mechanochemical Method

Nanodimensional and Nanocrystalline Calcium Orthophosphates

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