Title of article :
Synthesis of superparamagnetic bare Fe3O4 nanostructures and core/shell (Fe3O4/alginate) nanocomposites
Author/Authors :
Srivastava، نويسنده , , Manish and Singh، نويسنده , , Jay and Yashpal، نويسنده , , Madhu and Gupta، نويسنده , , Dinesh Kumar and Mishra، نويسنده , , R.K and Tripathi، نويسنده , , Shipra and Ojha، نويسنده , , Animesh K.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2012
Pages :
9
From page :
821
To page :
829
Abstract :
In this article we report about the synthesis of superparamagnetic bare Fe3O4 nanostructures and core/shell (Fe3O4/alginate) nanocomposites by simple low-temperature based method at pH values 5, 9, and 14. The structural morphology and magnetic behavior of Fe3O4 nanostructures and core/shell (Fe3O4/alginate) nanocomposites (Fe3O4/alg NCs) have been investigated by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy (RS), ultraviolet–visible (UV–vis) spectroscopy, transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX) and vibrating sample magnetometer (VSM). The particle size was calculated by TEM measurements and it turns out to be ∼10 nm and ∼14 nm for bare Fe3O4 nanoparticle and Fe3O4/alg NCs with core/shell structure, respectively. The magnetic properties of the synthesized products were found to be function of pH at which the synthesis has been done. The synthesized Fe3O4 nanoparticle and Fe3O4/alg NCs were found to be superparmagnetic in nature at room temperature. We observed that the value of saturation magnetization in case of Fe3O4/alg NCs decreases by increasing the pH value.
Keywords :
Alginate , Magnetic NPs , Core–shell , Composites , Biomedical
Journal title :
CARBOHYDRATE POLYMERS
Serial Year :
2012
Journal title :
CARBOHYDRATE POLYMERS
Record number :
1623747
Link To Document :
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