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Title of Journal: J Mater Sci Mater Electron

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Abbravation: Journal of Materials Science: Materials in Electronics

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Springer US

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1573-482X

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Synthesis of superparamagnetic cobalt nanoparticle

Authors: M Alagiri C Muthamizhchelvan Sharifah Bee Abdul Hamid
Publish Date: 2013/07/13
Volume: 24, Issue: 11, Pages: 4157-4160
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Abstract

The superparamagnetic SPM cobalt nanoparticles with an average size of 2 nm have been prepared through a solvothermal process in the presence of triethanolamine The synthesized nanoparticles are characterized by Xray diffraction transmission electron microscopy Xray photoelectron spectroscopy XPS Fourier transform infrared spectroscopy and superconducting quantum interference device magnetometer Xray diffraction analysis confirms the face centered cubic phase of asprepared cobalt nanoparticles Transmission electron microscopy was employed to study the morphology of the asprepared product which exhibit sphericallike shape with size around 2 nm The high resolution transmission electron microscopy image of cobalt nanoparticles shows the lattice spacing value of 0204 nm This is well matched with the 111 lattice spacing of fcc Co XPS revealed the prepared product is pure cobalt The blocking temperature of 17 K was obtained and confirmed by fieldcooled and zerofieldcooled plots The hysteresis loop revealed the synthesized nanoparticles have SPM character at room temperature

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