Mechanochemical–hydrothermal synthesis of carbonated apatite powders at room temperature

Suchanek, Wojciech L.; Shuk, P.; Byrappa, K.; Riman, Richard E.; TenHuisen, Kevor S.; Janas, Victor F.

doi:10.1016/s0142-9612(01)00158-2

Cited by 296 publications

(201 citation statements)

References 27 publications

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“…Considering the intensity of the peak in position of 25.9° with Miller indices of (002), it is obvious that an increase in implantation time (carbon increase), decreases the peak height and increases the peak width as shown in Figure 2. This result is in agreement with those reported in some references [11][12][13][14][15].…”

Section: Esr Measurementsupporting

confidence: 94%

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Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Noori¹,

Ziaie²

2016

J Nanomed Nanotechnol

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In this research work, carbonated hydroxyapatite samples with different carbonate contents were prepared using ion implantation method. Pure nano-structure hydroxyapatite samples were implanted by 80 keV CO 2 + ions during different times of 4, 8, 16, and 24 min using an ion implantation devise. The resulting materials were tested by X-ray diffraction, Fourier transform Infrared spectroscopy, and transmission electron microscopy, electron spin resonance systems before and after the implantation. The results confirmed the doping of carbonate group into the hydroxyapatite structure, and show that the presence of carbonate in the structure of hydroxyapatite decreases the degree of crystallinity. Moreover, it was observed that the increasing of ion implantation time caused to decrease the average grain size of the hydroxyapatite sample.

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Section: Esr Measurementsupporting

confidence: 94%

“…Chemical structure of the hydroxyapatite and CO 2 + ion is shown in Figure 5 [13]. According to this figure, the CO 2 + ions can enter into the channels or bonds with the oxygen in one of the two indicated positions, and eventually form carbon apatite.…”

Section: Resultsmentioning

confidence: 99%

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Noori¹,

Ziaie²

2016

J Nanomed Nanotechnol

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“…'deki zayıf bandın ise kaplamalar tarafından atmosferden absorbe edilen neme ait OH-kaynaklı olduğu düşünülmektedir [12].…”

Section: Deneysel Yöntemler (Experimental Methods)unclassified

Titanyum Alaşımının Biyomimetik Yöntemle Kalsiyum Fosfat Kaplanması

Yılmaz¹,

Evis²,

Güldiken³

2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETBu çalışmada, biyomedikal alanda sıklıkla kullanılan bir titanium alaşımı olan Ti6Al4V üzerine biyomimetik yöntemle hidroksiapatit kaplanmıştır. Kaplama işlemi için, Ti6Al4V plakalar, sıcaklığı 37°C'de tutulan ve normal iyonik konsantrasyonundan 1,5 kat daha yoğun olarak hazırlanan yapay vücut sıvısı (1,5×SBF) içerisinde bekletilmiştir. Tüm yüzeyin 2 hafta sonrasında kalsiyum fosfat tabakası ile kaplanmış olduğu gözlemlenmiştir. Kaplamanın yüzey morfolojisi alan emisyon taramalı elektron mikroskobu (FE-SEM) ile incelenmiş ve yüzeydeki kalsiyum fosfat birikiminin ilk olarak yarım kürecikler şeklinde başladığı ve 1,5×SBF içerisinde geçen süre arttıkça bu küreciklerin büyüdüğü görülmüştür. Kaplamanın moleküler yapısı Fourier dönüşümlü kızıl ötesi spektrometresi (FTIR) ile incelenmiştir. FTIR sonuçlarına göre, 1,5×SBF içerisinde bekleme süresi farklı olan plakaların üzerinde oluşan kaplamaların hepsi karbonatlı hidroksiapatit spektrumu vermiştir. Anahtar kelimeler: Ti6Al4V; Biyomimetik Kaplama; SBF; SEM; FTIR BIOMIMETIC CALCIUM PHOSPHATE COATING OF TITANIUM ALLOY ABSTRACTIn this study, hydroxyapatite (HA) was coated on Ti6Al4V, which is a widely used titanium alloy in biomedical applications, via biomimetic method. For the coating process, Ti6Al4V plates were immersed into simulated body fluid (SBF) with an ionic concentration of 1.5 times that of conventional SBF at 37°C. In 1.5×SBF, the entire surface was successfully coated with a calcium phosphate (CaP) layer after 2 weeks. The surface morphology of the coated plates was studied by field emission scanning electron microscopy (FE-SEM) and it was shown that the CaP coating was initiated in the form of half spheres and grew up continuously. The molecular structure of the coatings was determined by Fourier transform infrared spectroscopy (FTIR) and the coatings showed the IR spectrum of carbonated hydroxyapatite regardless of the soaking time.

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“…Mechanical activation (MA) as a solid-state reaction has been widely studied as an appropriate technique to produce nano-structured HA [6][7][8][9] and carbonate substituted HA [10][11][12]. Solid-state reactions usually give a stoichiometric and well-crystallized product [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Solid-state reactions usually give a stoichiometric and well-crystallized product [6][7][8][9][10][11][12]. Sol-gel rout, which is one of the wet chemical methods for the preparation of HA nanopowder, has a low fabrication rate but can produce products with high purity and nano-sized particles [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization and bioactivity evaluation of nano-structured hydroxyapatite

Fathi¹,

Mortazavi²,

Hanifi³

et al. 2009

Computational Methods and Experiments in Materials Characterisation IV

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Due to its biocompatibility and bioactivity, hydroxyapatite (HA) has a wide range of applications in medical engineering cases, such as bone repair and bone tissue regeneration. The use of artificial HA with a similar structure and chemical composition to biological apatite could increase the durability of the HA inside the natural hard tissues. The aim of the present work was to synthesis nano-structured HA via different routs, the comparison of their characteristics and enhancement of the bioactivity of HA by controlling its crystallite size and chemical composition. Nano HA was prepared by mechanical activation and sol gel routs. The x-ray diffraction technique (XRD), Fourier transform infra red spectroscopy (FTIR) and transmission electron microscopy (TEM) were used to characterize the HA powder. The synthesized powder was soaked in simulated body fluid (SBF) for various periods of time in order to evaluate its bioresorbability and bioactivity after immersion in SBF. Atomic absorption spectroscopy (AAS) was used to determine the dissolution of calcium ions in the SBF media. Results showed that the prepared HA powder had a nanoscale structure with a size of 29 nm for the powder prepared by mechanical activation and 25 nm for the powder that was prepared by the sol gel method. The ionic dissolution rate of nano-structured powder was higher than conventional HA (with micro scale size) and was similar to biological apatite. It could be concluded that bioactivity behaviour of HA powder is affected by its crystallite size. Using the nano-structured HA powder with less than 50 nm crystallite size, the optimum bioactivity and bioresorbability would be achieved.

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Mechanochemical–hydrothermal synthesis of carbonated apatite powders at room temperature

Cited by 296 publications

References 27 publications

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Effect of CO2 Ion Doping on Characteristics of Nanostructure Hydroxyapatite

Titanyum Alaşımının Biyomimetik Yöntemle Kalsiyum Fosfat Kaplanması

Synthesis, characterization and bioactivity evaluation of nano-structured hydroxyapatite

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