Luminescence variations in europium-doped silicon-substituted hydroxyapatite nanobiophosphor via three different methods

Thang, Cao Xuan; Pham, Vuong-Hung

doi:10.1016/j.mseb.2015.02.014

Cited by 13 publications

(9 citation statements)

References 39 publications

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“…Similar to the PL emission characteristic of Eu‐doped FHA in the as‐received state, the PL intensities of Eu‐doped FHA increased with the increasing fluorine concentrations, When the fluorine concentration in the reaction solution was 0.3 mol%, they reached their maximum value, and then decreased with further increasing fluorine concentrations. This significantly enhanced PL was mainly attributed to the achievement of a β‐TCP phase in the HA/β‐TCP system, which can be explained by considering the photoquenching effect of the hydroxyl group (OH) in optical HA/β‐TCP system . The enhanced PL intensities should be mainly due to achievement of the β‐TCP phase in the HA/β‐TCP system, which was also consistent with the XRD results (Figure ).…”

Section: Resultssupporting

confidence: 85%

“…This PL characteristic of Eu‐doped FHA was mainly attributed to the different morphology of the Eu‐doped FHA. In other words, the low aspect ratio of particle (spherical or near spherical) morphology is good for high brightness and high resolution because of the high packing density and reduction of light scattering, which offers the possibility of enhancing luminescence . Here the samples changed from long nanowire particles to near spherical particles when the samples were synthesized at pH 10.…”

Section: Resultsmentioning

confidence: 99%

“…Hydroxyapatite (HA) has drawn much attention in the design of functional materials because of its high biocompatibility and the easily accepted wide variety of dopants based on flexibility of the apatitic structure . Thus, considerable effort has been made to functionalize hydroxyapatite nanoparticles by doping materials with more biocompatible and optical dopants to address new functions . In order to expand the applications of the optical device performance and luminescent materials for nanomedicine, it is necessary to control a different visible light emission in the same host materials, especially for distinguishing different parts of cellular structure and tissue as well as growing numbers of applications in environmental friendly white light emission diodes (white LEDs) .…”

Section: Introductionmentioning

confidence: 99%

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Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

et al. 2016

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This paper reports a novel way for the synthesis of a europium (Eu)-doped fluor-hydroxyapatite (FHA) nanostructure to control the luminescence of hydroxyapatite nanophosphor, particularly, by applying optimum fluorine concentrations, annealed temperatures and pH value. The Eu-doped FHA was made using the co-precipitation method followed by thermal annealing in air and reducing in a H atmosphere to control the visible light emission center of the nanophosphors. The intensities of the OH group decreased with the increasing fluorine concentrations. For the specimens annealed in air, the light emission center of the nanophosphor was 615 nm, which was emission from the Eu ion. However, when they were annealed in reduced gas (Ar + 5% H ), a 448 nm light emission center from the Eu ion of FHA was observed. The presence of fluorine in Eu-doped FHA resulted in a significant enhancement of nanophosphor luminescence, which has potential application in light emission and nanomedicine.

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Section: Resultssupporting

confidence: 85%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

et al. 2016

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“…With increasing concentrations of Eu 3+ in Eu/Sr‐HA, the formation of β‐TCP peak intensity increases, whereas the HA phase is affected in the patterns. The presence of HA peaks with β‐TCP may improve the luminescence and osteoconductivity . From the enlarged Figure (b), it is clear that, with an increment in the doping level of Eu 3+ , the diffraction peak of β‐TCP shifts toward lower 2ϴ angle which evidences the doping of minerals in the HA lattice.…”

Section: Resultsmentioning

confidence: 99%

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

et al. 2017

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In the present investigation, we have successfully synthesized luminescent Eu -doped and Eu /Sr codoped hydroxyapatite (HA) nanoparticles through sol-gel assisted precipitation method with the aim of developing novel biomaterials containing osteoblast mineral (Sr ) and luminescence activator (Eu ). The structure, morphology, thermal stability, and luminescence properties of the resultant spherical nanoparticles (50-100 nm diameters) were studied. Moreover, the in-vitro bioactivity of Eu Sr HA nanoparticles was investigated by immersing in the simulated body fluid for many weeks. The antimicrobial activity results against gram positive and gram negative bacterial stains, showed better resistivity for the Eu Sr HA among the other compositions. The MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] assay of live/dead cells cultured with Eu /Sr -doped HA nanoparticles retained its normal morphology and did not show a significant impact on cell proliferation at various incubation days, which evidence for the material's superior biocompatible nature even at a higher concentration of 375 µg/mL. Thus, the incorporation of dual ions in HA nanoparticles with strong luminescence properties develops potential biomaterial for live cell imaging and in nanomedicine. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2191-2201, 2018.

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“…15,16 The morphology of Si-substituted HAp:Eu 3þ changed from the nanowire to spindle with the change of the synthesis methods. 17 In this paper, we have synthesized HAp:Eu 3þ nanorods with uniform morphology on mild solution conditions. The morphology, structure and fluorescent properties of the products were also investigated in detail.…”

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Synthesis and characterization of europium ions doping of hydroxyapatite nanorods by the simple two step method

Kong

Xiao

Qiu

et al. 2015

Funct. Mater. Lett.

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Europium doping hydroxyapatite (HAp:Eu 3þ ) nanorods have been successfully prepared via the simple precipitation-hydrolysis route at atmospheric pressure. The precursor samples were testified to be monetite (CaHPO 4 ) by the precipitation step. The HAp: Eu 3þ nanorods were single phase and highly crystallized after hydrolysis process. The different doping concentration of Eu 3þ ions can change obviously in size and aspect ratio of the HAp:Eu 3þ particles. HAp:Eu 3þ nanorods show the characteristic emission of Eu 3þ . The different emission intensity should be due to the doping concentration of Eu 3þ . The emission intensity of IBU-loading nanoparticles decreased to 63% of that of the as-prepared HAp:Eu 3þ nanoparticles, which indicates that the HAp:Eu 3þ nanoparticles can be used as a fluorescent label in the drug system. The low load capacity and speedy release were because of the weak reaction between HAp:Eu 3þ nanorods and IBU molecules.

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Luminescence variations in europium-doped silicon-substituted hydroxyapatite nanobiophosphor via three different methods

Cited by 13 publications

References 39 publications

Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications

Synthesis and characterization of europium ions doping of hydroxyapatite nanorods by the simple two step method

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Luminescence variations in europium-doped silicon-substituted hydroxyapatite nanobiophosphor via three different methods

Cited by 13 publications

References 39 publications

Enhancing the luminescence of Eu3+/Eu2+ ion‐doped hydroxyapatite by fluoridation and thermal annealing

Enhancing the luminescence of Eu3+/Eu2+ ion‐doped hydroxyapatite by fluoridation and thermal annealing

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu3+/Sr2+ dual‐doped nano‐hydroxyapatite for biomedical applications

Synthesis and characterization of europium ions doping of hydroxyapatite nanorods by the simple two step method

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Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

Enhancing the luminescence of Eu³⁺/Eu²⁺ ion‐doped hydroxyapatite by fluoridation and thermal annealing

In‐vitro biocompatibility, bioactivity and photoluminescence properties of Eu³⁺/Sr²⁺ dual‐doped nano‐hydroxyapatite for biomedical applications