Apatite films produced by electrodeposition: …

The CO3 content of apatite samples depends on the (NH4)2CO3 concentration of the treated solutions. A single-pot, single-step treatment enables the synthesis of both Ag …

Bioactive Molecule-apatite Composite

Bioactive Molecule-apatite Composite C. Chen 1,2, I-S. Lee *, S-M. Zhang2, H-C ... Calcium phosphate (CaP) film with the thickness of around 500 nm was deposited on the substrates by electron beam evaporation. ... concentration in solutions was measured using Calcium Assay Kit (DICA-500). OGP spatial distribution on apatite was confirmed ...

Ultrastructural analyses of nanoscale apatite …

cium and phosphate concentration, pH, temperature, and the presence of other inorganic and organic mol- ... properties.2,3,5,13–16 However, few ultrastructural-level studies (from 0.1 to 100 nm) on apatite films deposited from SBF have been conducted, and most transmission a)Address all correspondence to this author. e-mail: [email protected] ...

Structural and crystal-chemical characteristics of the apatite …

Thermal behavior of biological apatite is the object of several studies. Crystal size, carbonate content, phase composition, and other parameters change during annealing up to 900 °C in biological minerals with apatite structure. ... (AS) was applied for the evaluation of the concentration of some elements in the "labile" (water soluble ...

Apatite films produced by electrodeposition: …

[13][14][15][16] Manso et al. used both AFM and HRTEM to study the structure of thin (<0.3 mm) sodium-and carbonate-containing HAP that was grown from a basic solution (pH 9.1) on Si (100) and Ti ...

Sol–gel preparation of bioactive apatite films

The surface morphology of the films can be controlled by sol–gel processing parameters such as different precursors [9], post heat-treatment [10] and addition of chemical additives [11]. The film solubility can be lowered by enhancing the apatite phase to develop well [12] and incorporating fluorine into the apatite phase [13].

Ultrastructural analyses of nanoscale apatite biomimetically grown …

The macroscopic and nanoscopic morphology of apatite coatings deposited from SBF are influenced by calcium and phosphate concentration, pH, temperature, and the presence of other inorganic and organic molecules.3, 10, 11, 12 The morphology and structure of apatites, in turn, dictate the biomechanical and biochemical properties.2, 3, 5, 13, 14 ...

Rare-earth Element-bearing Apatites and Oxyapatites

A number of prepared alkaline-earth-rare-earth silicates and germanates also have the structure of apatite type. The fifth chapter of this book then continues with description of synthetic compounds of apatite structure. Attention will be directed to description of rare-earth element bearing apatites and oxyapatites. The structure, properties and preparation of apatite …

Thin film of low-crystalline calcium phosphate apatite formed …

The PCA thin film was formed through fusion and transformation of granular calcium phosphate particles which had initially formed on the surface, into a film of calcium phosphate apatite crystal ...

(PDF) A Review on Ionic Substitutions in Hydroxyapatite Thin Films

concentration has been var ied in a wide range (0 up to 10 at.%). ... Bone apatite-like films were deposited directly from deproteinized bone targets, without any . grinding or calcination.

Sol–Gel Preparation of Bioactive Apatite Films | Request PDF

When fluorine is incorporated into the film, an increase in crystallinity of the apatite film and a decrease in intrinsic solubility of the FHA film could make significant contributions to the ...

Quantifying F and Cl concentrations in granitic melts …

develop an approach for estimating melt concentrations of F and Cl from apatite inclusions contained in zircon, draw-ing upon recent advancements in apatite F–Cl–OH exchange modelling (Li and Hermann 2017; Li and Costa 2020), data from published apatite-melt experiments, and Ti-in-zircon thermometry. We discuss the mechanisms responsible for

Apatite flotation using pataua palm tree oil as collector

Froth flotation is the most important concentration method for beneficiating phosphate ores [2], [3].In this process, most collectors used worldwide are fatty acids obtained from vegetable species as byproduct of different industries, e.g., tall oil, a byproduct of the paper industry [4], [6].However, the investigations on alternative sources are being encouraged as …

Amorphous apatite thin film formation on a biodegradable …

The apatite film thickness was 7.78 µm, of film thickness with increasing electrolyte temperature as it shown in the supplementary data Figure (S4, S5, and S6). The FTIR spectrum of the different coated samples is shown in fig.4, the band at vibration of (ν4) assigned to PO group is located at around 530 cm01 and between (105501190) cm01 41.

Effect of pulse current on structure and adhesion of apatite

Apatite films were deposited onto titanium (Ti) metal substrates by an electrodeposition method under a pulse current. Metastable calcium phosphate solution was used as the electrolyte. The ion concentration of the solution was 1.5 times that of human body fluid, but the solution did not contain magnesium ions at 36.5 °C. We used an average current …

Fabrication of Apatite Films on Ti Substrates of …

This chapter focuses on the fabrication of apatite film on Ti substrate by chemical process used in the metal complexes. We prepared two …

Apatite Deposition and Collagen Coating Effects in Ti–Al …

morphology of apatite coatings deposited from SBF is influenced by calcium and phosphate concentration, pH, temperature, and the presence of inorganic and organic molecules. Hence …

Continuous Crystalline Carbonate Apatite Thin Films.

Carbonated apatite is regarded as a better model for bone minerals1 and, therefore, carbonated apatite thin film coatings are likely to be more biologically compatible.13 Thus, it is important to study the properties of thin films made of carbonated apatite as well. The lack of reports on carbonate apatite thin films may be

(PDF) Fabrication of Apatite Films on Ti Substrates of Simple …

We performed thin carbonate-containing apatite (CA) coating on titanium (Ti) by an aqueous spray coating (ASC) method that consisted of a Ca-CO3-PO4 complex.

In vitro apatite deposition on titania film derived from …

When exposed to the solution, TiO 2 films on titanium alloy induced the formation of large apatite particles by the ion exchange between the film and Na +, Ca 2+, etc. in SBF in former studies ...

Quantifying F and Cl concentrations in granitic melts from apatite

Apatite inclusions hosted by zircon offer a means to probe the magmatic history of granitic rocks and better constrain the volatile budgets of crystallising granitic melts. Building on recently developed F–Cl–OH partitioning models for apatite and coexisting melt, we outline an approach for estimating the melt concentrations of F and Cl from the composition of apatite …

Quantification of CO2 concentration in apatite

concentrations in small apatite crystals as well as zoning of CO 2 in apatite. The focus of this study is on the quantification of CO 2 concentrations in apatite by Fourier transform infrared spectroscopy (FTIR). CO 2 enters the apatite structure as the carbonate ion CO 3 2– in several ways, resulting in a series of complicated infrared (IR)

Recovery of Apatite from Magnetic Concentration Tailings …

Iron concentration tailings contain many valuable minerals, including apatite, which is not currently being recovered despite its use to make fertilizers and chemicals. This article proposes a flotation circuit to recover apatite from tailings generated by mining in Chile, based on laboratory tests and using the "Split Factor" method. The iron tailings were characterized by …

Energy dispersive X-ray spectroscopy (EDS) …

Thin film ZnO-doped Ce 4.67 (SiO 4) 3 O (ZCS) oxy-apatite was synthesized via room temperature sputtering of binary oxide precursor components followed by low oxygen partial pressure (p(O 2) ∼10 ...

Structural and crystal-chemical characteristics of the apatite …

Crystal size, carbonate content, phase composition, and other parameters change during annealing up to 900 °C in biological minerals with apatite structure. The way these parameters …

Structure and apatite formation of microarc oxidized TiO 2-based films

Request PDF | Structure and apatite formation of microarc oxidized TiO 2-based films before and after alkali-treatment by various alkali concentrations | Alkali-treatment was performed to modify ...

[PDF] Apatite Deposition on NaOH‐Treated PEEK and UHMWPE Films …

The data demonstrate that with an increase in NaOH concentration the wettability of the polymer increased, whilst some changes to the polymer film topography were observed, thus, promising good in vivo bioactivity of these polymer films—a necessity if they are to be integrated into artificial cornea. Cornea implants consist of a clear optic portion with a surrounding ring …

Development of Hydroxyapatite Coatings for Orthopaedic …

Figure 4f shows the NaCl content of the films. The NaCl concentration is small for all samples, regardless of the ionic strength (Na at% < 2.5% and Cl at% < 2%), which is consistent with the expectations because of the high solubility of NaCl. ... Solutions 3 and 4 showed slower apatite film growth kinetics, but they showed the most adhered ...

Electronic Properties of TiO2 Nanoparticles Films and the …

The ability of the surfaces to induce apatite nucleation was evaluated by immersion samples in SBF solution for 12 h, 72 h, and 1 week. The SBF solution contains ions with similar concentration as the human blood plasma and the recipe for SBF solutions can vary. In the present paper, the revised SBF recipe presented by Oyane et al. was used ...

Silicate-substituted strontium apatite nano coating improves

PET films, nano-coated with SrSiP, were prepared. Bone marrow mesenchymal cells (BMSCs) from femurs of male rats were cultured and seeded at a density of 1.0 × 104/cm2 onto the SrSiP-coated and non-coated PET film, and subsequently placed in an osteogenic medium. The osteocalcin concentration secreted into the medium was compared in each case.

Development of Hydroxyapatite Coatings for Orthopaedic …

The concentration levels of solutions influence film thickness, coverage, and coating rate; NaCl was shown to have no role in HA bonding. Lower concentration solutions formed very thin …

Apatite Chlorine Concentration Measurements by LA-ICP-MS

Les valeurs 35 Cl/ 43 Ca pour chaque apatite (10–20 analyses chacune) lorsqu'elles sont reportées par rapport aux concentrations en Cl obtenu par EPMA produisent des relations d'étalonnage parfaitement contraintes, ce qui démontre la pertinence du protocole analytique et que les mesures de routine du Cl de l'apatite par ICP-MS sont ...

Tailoring antibiotic release for the treatment of periodontal …

Controlled antibiotic release for the management of periodontal infrabony defects using bioactive gelatin-alginate/apatite nanocomposite films ... films containing different concentrations of AEO ...

Apatite-coated titanium dioxide photocatalyst for air purification

Apatite found in bone and the enamel of teeth that are in the early stages of eruption is reported to be calcium-deficient. Microscopic observation of the cross-section of the specimen as shown in Fig. 2, revealed that an apatite film with a thickness of approximately 0.7 μm has formed on the approximately 0.3 μm thick titanium dioxide layer ...

TEM-SAED results of apatite from Kaiyang phosphorite. (a) …

Compared with the apatite film in Niutitang phosphorite, the apatite film in Kaiyang phosphorite (Figs. 7c-7d) and Yangtze Gorges phosphorite (Figs. 8c-8d) showed relatively coarser granular textures.

Continuous Crystalline Carbonate Apatite Thin Films. A …

Abstract: In contrast to extensive studies on hydroxyapatite thin films, very little has been reported on the thin films of carbonated apatite (dahllite). In this report, we describe the synthesis and characterization of a highly crystalline dahllite thin film assembled via a biomimetic pathway.

(PDF) What Lurks in the Martian Rocks and Soil

(d) High-resolution TEM image of the film in c, it shows randomly oriented 3-5 nm domains of lattice fringes, confirming that the film is made of numerous ultrafine apatite particles.

Contrasting In Vitro Apatite Growth from Bioactive Glass …

The strong (inverse) correlation between the extent of apatite formation (Figure 3 a) and the P concentration of the accompanying solution (Figure 3 d) is worth underscoring, where identification of the steep decrease in [P] is a convenient and reliable marker for the onset of apatite formation; a qualitative relationship between the apatite ...

Nano-Hydroxyapatite Gel and Its Effects on Remineralization …

Nano-hydroxyapatite gel (NHG) has never been investigated for enamel remineralization. This study evaluated the effects of two concentrations of NHG on remineralization of an artificial …

Halogens, trace element concentrations, and Sr-Nd isotopes in apatite

REE concentrations for apatite from the three deposits are reported in Table SM5 and summarized in Table 2. Cl-OH-apatite from Carmen has total LREE concentrations of ca. 1900 μg/g with (La/Yb)cn = 0.46–3.8, lower than in F-apatite (ca. 2600 μg/g LREEs and (La/Yb)cn = 1.5–10.8), but their HREE concentrations are in the same range (ca. 680 ...