期刊
MATERIALS LETTERS
卷 95, 期 -, 页码 186-189出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2012.12.096
关键词
Colloidal processing; Superparamagnetic; XPS; MRI contrast agent
资金
- Dept. of Biotechnology (DBT), Govt. of India [BT/PR10874/NNT/28/136/2008]
- Max Planck India Fellowship
- Salzgitter Mannesmann Forschung GmbH
Magnetite nanoparticles have been prepared by one-pot thermal decomposition process using iron (III) acetylacetonate in stearic acid in ambient environment. In this process, stearic acid acts. as solvent as well as capping agent for the particles. These as-prepared hydrophobic magnetite nanoparticles have been converted into a hydrophilic form using tetramethylammonium hydroxide. This controlled surface functionalization approach limits microstructural and phase alteration due to the ligand exchange. A detailed investigation was carried out on the microstructural characteristics of these nanoparticles with the aid of X-ray diffraction, infrared spectroscopy, XPS and transmission electron microscopy. The hydrophilic superparamagnetic magnetite particles posses extraordinary transverse relaxivity and contrast property, making them potential T-2 contrast agent in clinical magnetic resonance imaging. (C) 2013 Elsevier B.V. All rights reserved.
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