Lithium-doped hydroxyapatite nano-composites: Synthesis, characterization, gamma attenuation coefficient and dielectric properties

Badran, H.M.; Yahia, I.S.; Hamdy, Mohamed S.; Awwad, Nasser S.

doi:10.1016/j.radphyschem.2016.08.001

Cited by 82 publications

(47 citation statements)

References 33 publications

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“…It can be observed from the figure that the value of µ is enriched by doping compared to pure material which indicates that the doped nanostructures can work better as a shield material. The calculated values are found to be comparable with pure and Gd 3+ doped PbI 2 as well as other previously reported materials [21,[35][36][37]. This value is also found to be higher than that in our previous system Ag:Mn:PbI 2 tested with Am-241 and published recently [22].…”

Section: Linear Absorption Coefficient Analysissupporting

confidence: 89%

Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Yahia

Shkir

Ganesh

et al. 2018

Materials Science-Poland

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Herein, we report a successful development of nano-scale pure and Al and Mn co-doped PbI2 using facile microwaveassisted route. Structural study was done through X-ray diffraction analysis of grain size, dislocation density and lattice strain. The crystallite size was found to vary from 28 nm to 40 nm due to Al:Mn co-doping in PbI2. The presence of various vibrational modes was confirmed by FT-IR spectroscopy and red shifting was observed in peak positions compared to the bulk. Surface morphology, examined using a scanning electron microscope, confirmed the formation of single crystal nanosheets of a thickness in the range of 10 nm to 30 nm. The single crystal nanosheets were found to be transformed to large area nanosheets due to the doping. Enhancement in dielectric constant from ~7.5 to 11 was observed with increasing Al doping concentration. Linear attenuation coefficient was calculated and showed the enhancement of blocking gamma rays with increasing doping concentration. Its value was found to increase from 7.5 to 12.8 with the doping. The results suggest that the synthesized nanostructures can be used for detection and absorption of gamma rays emitted by 137Cs and 241Am sources.

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Section: Linear Absorption Coefficient Analysissupporting

confidence: 89%

Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Yahia

Shkir

Ganesh

et al. 2018

Materials Science-Poland

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“…The characteristic peak of the sample appears at 2θ = 29.08, corresponding to (210) plane of HAP, which confirms the presence of HAP crystallite. The average crystalline size of all samples scaffold were estimated using Debye-Scherer equation confirming the nanostructure of the nano-composite and was found to be 12.2 nm, this range confirms that all the studied composites are nanostructured materials (Padiyan et al, 2003;Badran et al, 2017).…”

Section: X-ray Analysissupporting

confidence: 65%

Characterization of Hydrothermally Synthesised Hydroxyapatite Bioceramic

Canbay¹,

Mustafa²,

Özkul³

2018

Turkish Journal of Engineering

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In this study, hydroxyapatite (HAP) was synthesized by hydrothermal method. The structural analysis, thermal analysis and electrical characteristics of HAP sample have been investigated. The structural analysis was performed to determine the crystal structure and to observe the surface morphology of the sample. The thermal analysis was made from room temperature to 925 ˚C, to determine the mass loss according to temperature and phase transitions or decomposition in the sample and also TG-DTA analysis was done to determine the thermal stability. The compositional analysis was done by EDX. I-V analysis was made to calculate the electrical conductivity value of the sample and electrical conductivity of the sample was obtained to be1.2x10-10 S/cm.

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“…Li-substituted HA was prepared by Kaygili et al [163], who found increments in both the crystallite size and crystallinity with increases in the amount of lithium along with transformation of the HA crystal structure from hexagonal to trigonal. Another study recorded an insignificant change in the "c" axis with a slight increase in "a" axis in different Li-HA samples [164].…”

Section: Monovalent Cationsmentioning

confidence: 94%

Doped biphasic calcium phosphate: synthesis and structure

Basu

2019

Journal of Asian Ceramic Societies

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Hydroxyapatite, tricalcium phosphate, and a mixture of these, i.e biphasic calcium phosphate (BCP), are widely employed as ceramic materials in hard tissue engineering, despite their poor mechanical and functional properties. The method of ionic substitution inside their lattice structures has been examined extensively by researchers in their long efforts to develop materials, that closely resemble natural hard tissues. The presence of dopants has a deep impact on the phase assemblage, structural, and functional behaviors of BCP. In this context, the goal of the current article is to cover different aspects of ongoing research on doped biphasic calcium phosphate. Apart from providing brief descriptions of different synthesis routes for producing ion-modified BCPs, the limitations of each technique are also discussed. In addition, particular emphasis has been given to describing the key experimental results, which elucidate the structural changes occurring due to doping. In particular, the preferable substitution sites of different dopant ions and the resulting crystallographic changes are depicted quite elaborately. Finally, the effects of substitution on biological and mechanical properties of BCP are briefly mentioned. In summary, the present review focuses on the ionic substitutions in BCP systems and their collective effects on material behaviors.

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Lithium-doped hydroxyapatite nano-composites: Synthesis, characterization, gamma attenuation coefficient and dielectric properties

Cited by 82 publications

References 33 publications

Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Characterization of Hydrothermally Synthesised Hydroxyapatite Bioceramic

Doped biphasic calcium phosphate: synthesis and structure

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Lithium-doped hydroxyapatite nano-composites: Synthesis, characterization, gamma attenuation coefficient and dielectric properties

Cited by 82 publications

References 33 publications

Facile microwave-assisted synthesis of Al:Mn co-doped PbI2 nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Facile microwave-assisted synthesis of Al:Mn co-doped PbI2 nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Characterization of Hydrothermally Synthesised Hydroxyapatite Bioceramic

Doped biphasic calcium phosphate: synthesis and structure

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Product

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Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies

Facile microwave-assisted synthesis of Al:Mn co-doped PbI₂ nanosheets: structural, vibrational, morphological, dielectric and radiation activity studies