Oriented hydroxyapatite single crystals produced by the electrodeposition method

Crystalline nano-coatings of fluorine-substituted hydroxyapatite produced by magnetron sputtering with high plasma confinement

“…1b). The typical PO 4 3 − bands in HA were present at 1092 cm −1 , 1020 cm −1 and 962 cm −1 [44]. The ν1 symmetric stretching band of the OH − groups in HA did not occur at 3570 cm −1 but at 3530 cm −1 , as shown in Fig.…”

“…1b) showed bands indicative of PO 4 3 − groups at 1095 cm − 1 (ν1; symmetric stretching vibration mode), 1041 cm −1 (ν3; asymmetric mode) and 965 cm − 1 (ν1; non-degenerate symmetric stretching mode around P-O). In the 400-650 cm −1 region, the bands at 603 cm − 1 , 571 cm −1 and 472 cm −1 correspond to phosphates, a triply degenerate asymmetric deformation mode (ν4) and a symmetrical deformation (ν2) of O-P-O, respectively.…”

“…HA has been used as a bioactive coating to improve the osteoconductivity of metallic implants. In addition to plasma spray deposition, a large number of coating techniques have been proposed for HA deposition on titanium implants, such as the sol-gel process [3], electrodeposition [4], pulsed laser deposition (PLD) [5], electron and ion beam deposition [6,7], electroncyclotron-resonance (ECR) [8], and radio-frequency magnetron sputtering (RFMS) [9].…”

“…HA coatings with ionic substitutions have been produced to stimulate bone binding to an implant surface. The substitution of Zn 2+ and Sr 2+ for Ca 2+ , the substitution of SiO 4 4 − and CO 3 2 − for PO 4 3 − and the substitution of F − for OH − have been shown to stimulate bone cell adhesion to an implant and to enhance the stability of coatings [19][20][21]. The incorporation of F − into the HA structure reduces the lattice parameters and the unit cell volume, resulting in a structure with a higher hardness and a lower dissolution rate [22,23].…”

Fabrication of MgAl2O4 Spinel Scaffolds and Sonochemical Synthesis and Deposition of Hydroxyapatite Nanorods

“…Generally, HAp formulations are prepared by various well‐known methodologies such as precipitation technique, sol–gel, hydrothermal, and multiple emulsion techniques . Furthermore, deposition processes such as biomimetic deposition and electrodeposition techniques are also employed . However, studies on sonochemical deposition of HAp formulation is limited and also to the best of authors knowledge attempts to simultaneously synthesis and deposit HAp on spinel foams through sonochemical process have not been studied yet .…”