Solvothermal synthesis and characterization of Ln (Eu3+, Tb3+) doped hydroxyapatite

Synthesis, characterization and luminescence properties of Eu3+-doped hydroxyapatite nanocrystal and the thermal treatment effects

“…In the literature [6,[26][27][28] it is shown that europium-doped hydroxyapatite synthesized at low temperature exhibits an emission spectrum attributed for Ca 2+ (I) substitution similar to those we have seen in the present work. A similar emission spectrum of Eu 3+ ions predominately in Ca 2+ (II) site, as we are showing, was obtained for samples prepared by combustion synthesis [13], ionic implantation [30], and samples heated at higher temperatures [29].…”

Structural evolution of Eu-doped hydroxyapatite nanorods monitored by photoluminescence emission

“…The substitution of Ca 2+ by a Eu 3+ ion has been studied by a mechanical alloying technique [3], a combination of sol-gel and electrospinning processes [4], a solvothermal method [5] and the thermal decomposition of precursors [6]. Yang and co-workers [6] obtained Eu-doped HA by the solvothermal process which showed uniform rod-like morphology.…”

Investigation on the structure and upconversion fluorescence of Yb3+/Ho3+ co-doped fluorapatite crystals for potential biomedical applications

“…Apatite crystals, including hydroxyapatite [Ca 10 (PO 4 ) 6 (OH) 2 , HA] and fluorapatite [Ca 10 (PO 4 ) 6 F 2 , FA], are often used as substitutes for the inorganic components of bones and teeth2122 due to their structural similarity to bone mineral, excellent biocompatibility, and bone-bonding bioactivity. Moreover, HA and FA can be employed as host materials for rare-earth doping as downconversion luminescent probes, such as in FA-Eu23 and HA-Tb24. Lanthanide ions have a radius similar to that of Ca 2+ ions and a high affinity to PO 4 3− ions2526, which can ensure the success of rare-earth doping.…”