Synthesis of non-aggregated nicotinic acid coated magnetite nanorods via hydrothermal technique

Non-aggregated magnetite nanorods with average diameters of 20–30nm and lengths of up to 350nm were synthesized via in situ, template free hydrothermal technique. These nanorods capped with different concentrations (1, 1.5, 2 and 2.5g) of nicotinic acid (vitamin B3); possessed good magnetic properti...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2016-02, Vol.399, p.58-63
Main Authors: Attallah, Olivia A., Girgis, E., Abdel-Mottaleb, Mohamed M.S.A.
Format: Article
Language:English
Subjects:
Coating
Hydrothermal
Magnetic properties
Magnetite
Nanorods
Nanostructure
Nicotinic acid
Phases
Synthesis
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Summary:Non-aggregated magnetite nanorods with average diameters of 20–30nm and lengths of up to 350nm were synthesized via in situ, template free hydrothermal technique. These nanorods capped with different concentrations (1, 1.5, 2 and 2.5g) of nicotinic acid (vitamin B3); possessed good magnetic properties and easy dispersion in aqueous solutions. Our new synthesis technique maintained the uniform shape of the nanorods even with increasing the coating material concentration. The effect of nicotinic acid on the shape, particle size, chemical structure and magnetic properties of the prepared nanorods was evaluated using different characterization methods. The length of nanorods increased from 270nm to 350nm in nicotinic acid coated nanorods. Goethite and magnetite phases with different ratios were the dominant phases in the coated samples while a pure magnetite phase was observed in the uncoated one. Nicotinic acid coated magnetic nanorods showed a significant decrease in saturation magnetization than uncoated samples (55emu/g) reaching 4emu/g in 2.5g nicotinic acid coated sample. The novel synthesis technique proved its potentiality to prepare coated metal oxides with one dimensional nanostructure which can function effectively in different biological applications. [Display omitted] •We synthesize nicotinic acid coated magnetite nanorods via hydrothermal technique•Effect of nicotinic acid concentration on the nanorods properties was significant•Nanorods maintained uniform shape with increased concentration of nicotinic acid•Alterations occurred in particle size, mineral phases and magnetics of coated samples.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2015.09.059