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

  • Lubna Sheikh
  • Neha Mahto
  • Suprabha Nayar
Biomaterials Synthesis and Characterization
Part of the following topical collections:
  1. Biomaterials Synthesis and Characterization

Abstract

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.

Keywords

Hydroxyapatite Iron Oxide Nanoparticles Differential Interference Contrast Calcium Nitrate Rapid Weight Loss 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

The authors acknowledge CSIR, Ministry of Science and Technology, Govt. of India for providing financial assistance from the network project “ESC-0103” and “OLP-0230”. Lubna acknowledges Department of Science & Technology (DST), Govt. of India for providing INSPIRE fellowship.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.CSIR-National Metallurgical LaboratoryMaterials Science & Technology DivisionJamshedpurIndia

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