Characterization of a calcium phospho-silicated apatite with iron oxide inclusions

Desport, Barthélémy; Carpéna, J.; Lacout, J.L.; Borschneck, Daniel; Gattacceca, J.

doi:10.1016/j.jcrysgro.2010.12.054

Cited by 4 publications

(5 citation statements)

References 31 publications

(32 reference statements)

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“…The FeOxHA colloid was studied by magnetic guidance to prove that the colloid maintained its applicable magnetic property even if the FeOx is coated with HA. The particles presented here differ from those before reported [5][6][7][8][9][10][11] by the advantage of homogeneity relating to the spatial distribution and simple preparation; moreover, the presence of carboxymethyl-dextran, together with HA, allows access to the cellular membrane. The negative charge of the FeOxHA particles (global zeta potential of −29 mV) are electrostatically attracted by the positively charged cellular membrane and facilitates, in a unique way, the interaction with the carboxyl groups.…”

Section: Introductionmentioning

confidence: 68%

“…Superparamagnetic iron oxide nanoparticles have received considerable attention as a potential simple contrast agent from drug delivery over biomolecule separation to sophisticated gene design [1,2]. To improve their biocompatibility by maintaining their robustness, iron oxide nanoparticles have been coated with titanium dioxides [3], carbon fibres [4] or, more recently, with hydroxyapatite (HA) [5][6][7][8][9][10][11]. The chemical structure of HA allows for a large number of substitutions at all three sites (Ca 2+ , PO 4 3− and HO − ) and allows interactions with metal oxides.…”

Section: Introductionmentioning

confidence: 99%

“…The chemical structure of HA allows for a large number of substitutions at all three sites (Ca 2+ , PO 4 3− and HO − ) and allows interactions with metal oxides. However, its chemical interaction with iron oxide is rarely debated in literature [10,11]. The natural iron oxide-hydroxyapatite from mineral deposits varies widely in compositions and structures [12][13][14][15][16] and is therefore ill-defined regarding sizes and properties.…”

Section: Introductionmentioning

confidence: 99%

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Magnetic apatite for structural insights on the plasma membrane

et al. 2014

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The iron oxide-hydroxyapatite (FeOxHA) nanoparticles reported here differ from those reported before by their advantage of homogeneity and simple preparation; moreover, the presence of carboxymethyldextran (CMD), together with hydroxyapatite (HA), allows access to the cellular membrane, which makes our magnetic apatite unique. These nanoparticles combine magnetic behavior, Raman label ability and the property of interaction with the cellular membrane; they therefore represent an interesting material for structural differentiation of the cell membrane. It was observed by Raman spectroscopy, scanning electron microscopy (SEM) and fluorescence microscopy that FeOxHA adheres to the plasma membrane and does not penetrate the membrane. These insights make the nanoparticles a promising material for magnetic cell sorting, e.g. in microfluidic device applications.

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Section: Introductionmentioning

confidence: 68%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic apatite for structural insights on the plasma membrane

et al. 2014

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“…Iron oxide nanoparticles (IONPs) such as maghemite (c-Fe 2 O 3 ) or magnetite (Fe 3 O 4 ) are of immense importance in medicine and biotechnology [1][2][3][4][5][6]. Recently, many breakthroughs of the synthesis and surface engineering of iron oxide nanoparticles [7] have been made and a core-shell structure [8][9][10] with hydroxyapatite (HA) [11][12][13][14][15] is one of them. HA, is one of the mineral components inside the bone and teeth with a chemical formula of Ca(2) 6 Ca(1) 4 (PO 4 ) 6 (OH) 2 .…”

Section: Introductionmentioning

confidence: 99%

In situ synthesis of hydroxyapatite nanocomposites using iron oxide nanofluids at ambient conditions

Sheikh

Mahto

Nayar

2015

J Mater Sci: Mater Med

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This paper describes a simple method for the room temperature synthesis of magnetite/hydroxyapatite composite nanocomposites using ferrofluids. The in situ synthesis of magnetic-hydroxyapatite results in a homogenous distribution of the two phases as seen both in transmission electron micrographs and assembled to a micron range in the confocal micrographs. The selected area diffraction pattern analysis shows the presence of both phases of iron oxide and hydroxyapatite. To the dialyzed ferrofluid, the constituents of hydroxyapatite synthesis was added, the presence of the superparamagnetic iron oxide particles imparts directionality to the hydroxyapatite crystal growth. Electron probe microanalysis confirms the co-existence of both iron and calcium atoms. Vibrating Sample magnetometer data shows magnetization three times more than the parent ferrofluid, the local concentration of iron oxide nanoparticles affects the strength of dipolar interparticle interactions changing the energy barrier for determining the collective magnetic behavior of the sample. The limitations inherent to the use of external magnetic fields which can be circumvented by the introduction of internal magnets located in the proximity of the target by a minimal surgery or by using a superparamagnetic scaffold under the influence of externally applied magnetic field inspires us to increase the magnetization of our samples. The composite in addition shows anti-bacterial properties against the two gram (-ve) bacteria tested. This work is significant as magnetite-hydroxyapatite composites are attracting a lot of attention as adsorbents, catalysts, hyperthermia agents and even as regenerative medicine.

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“…3. The lattice parameters and unit cell volume of the sintered samples were calculated using Checkcell software [10]. BFO exhibited rhombohedral R3c crystal structure.…”

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confidence: 99%

Effect of Sintering Temperature on Nanostructured Multiferroic BiFeO<sub>3</sub> Ceramics

Shami

Awan

Anis-ur-Rehman

2012

KEM

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Nanostructured multiferroic BiFeO3(BFO) powders were synthesized by using the co-precipitation method. Calcination of acquired powder was carried out at 400°C for 3h. Uniaxially pressed pellets were sintered at 500°C, 600°C, 700°C and 800°C for 2 hours in air. These samples were characterized for structural, thermal, electrical and magnetic properties. X-ray diffraction (XRD) confirmed the amorphous nature of the as driven powder and phase purity of the calcined BFO sample. The crystallite size varied with the sintering temperature from 52 to 70 nm. Sintering above 500°C induced impure phases due to oxygen vacancies and volumetric strain in crystal structure. Ferroelectric to paraelectric transition temperature TC~815°C was verified by the differential scanning calorimetry (DSC). Surface morphology and grain growth was observed using scanning electron microscopy (SEM). Electrical ac measurements were performed in the frequency range from 20 Hz to 3 MHz at room temperature. For a particular sample, capacitance decreased and susceptance increased with the increase of applied frequency signal. These parameters were increased with the increase of sintering temperature. Vibrating sample magnetometer (VSM) revealed the diverse weak ferromagnetic behavior for the samples sintered at different temperatures. Maximum coercivity (Hc~119.2 Oe) and maximum remnant magnetization (MR~2.1x10-3emu/g) were obtained for the sample sintered at 700°C for 2hr.

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Characterization of a calcium phospho-silicated apatite with iron oxide inclusions

Cited by 4 publications

References 31 publications

Magnetic apatite for structural insights on the plasma membrane

Magnetic apatite for structural insights on the plasma membrane

In situ synthesis of hydroxyapatite nanocomposites using iron oxide nanofluids at ambient conditions

Effect of Sintering Temperature on Nanostructured Multiferroic BiFeO<sub>3</sub> Ceramics

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