Synthesis of superparamagnetic bare Fe3O4 nanostructures and core/shell (Fe3O4/alginate) nanocomposites

被引：100
|
作者：
Srivastava, Manish [1 ,5 ]
Singh, Jay [2 ]
Yashpal, Madhu [3 ]
Gupta, Dinesh Kumar [4 ]
Mishra, R. K. [1 ]
Tripathi, Shipra [6 ]
Ojha, Animesh K. [1 ]
机构：
[1] Motilal Nehru Natl Inst Technol, Dept Phys, Allahabad 211004, Uttar Pradesh, India
[2] Natl Phys Lab, Dept Sci & Technol, Ctr Biomol Elect, Biomed Instrumentat Sect, New Delhi 110012, India
[3] Banaras Hindu Univ, Inst Med Sci, Dept Anat, Electron Microscope Facil, Varanasi 221005, Uttar Pradesh, India
[4] Motilal Nehru Natl Inst Technol, Dept Chem, Allahabad 211004, Uttar Pradesh, India
[5] DIT, Sch Engn, Dept Phys, Greater Noida 248001, India
[6] Galgotias Univ, Sch Basic & Appl Sci, Dept Chem, Gautam Budha Nagar 201306, India
来源：
CARBOHYDRATE POLYMERS | 2012年 / 89卷 / 03期
关键词：
Magnetic NPs; Composites; Biomedical; Alginate; Core-shell; DIELECTRIC-PROPERTIES; RAMAN; NANOPARTICLES; COMPOSITE; MICROSPHERES; MAGNETITE; PH;
D O I：
10.1016/j.carbpol.2012.04.016
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
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 similar to 10 nm and similar to 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. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：821 / 829
页数：9
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