期刊
JOURNAL OF NANOMATERIALS
卷 2016, 期 -, 页码 -出版社
HINDAWI LTD
DOI: 10.1155/2016/4878935
关键词
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资金
- National Basic Research Program of China (973 Program) [2013CB733800]
- National Natural Science Foundation of China [81571806]
- Jiangsu Provincial Special Program of Medical Science [BL2013029]
- Jiangsu Provincial Technical Innovation Fund for Scientific and Technological Enterprises [SBC201310643]
- National High Technology Research and Development Program of China [2013AA032205]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
This study reports the synthesis of three kinds of manganese-doped magnetic ferrite nanoparticles (MnFe2O4) in benzyl ether, octyl ether, and 1-octadecene by a simple and low cost thermal decomposition method. It was found that benzyl ether results in a dramatic improvement in nanoparticle crystallinity owing to its stronger reducibility compared to octyl ether and 1-octadecene, as demonstrated by X-ray diffraction and TEM measurements. Raman spectroscopy detection also indicated that the reducing solvent of benzyl ether was in favor of forming magnetite-like structure ferrite, while maghemite-like structured ferrite was obtained in octyl ether and 1-octadecene. Thesaturation magnetization (M-s) of MnFe2O4 synthesized in benzyl ether was 85 emu/g [Fe], which was 3 and 5 times larger than MnFe2O4 synthesized in octyl ether and 1-octadecene, respectively. The specific absorption rate (SAR) of MnFe2O4 nanoparticles synthesized in benzyl ether was 574W/g, while MnFe2O4 nanoparticles synthesized in octyl ether and 1-octadecene have had much smaller SAR of 76 and 33W/g, respectively. MnFe2O4 nanoparticles synthesized in benzyl ether also exhibit higher relaxivity (r(2) = 207mM(-1) s(-1)) than those synthesized in octyl ether and 1-octadecene (r(2) = 65 and 22mM(-1) s(-1)). It was obvious that MnFe2O4 nanoparticles synthesized in reducing benzyl ether have higher crystallinity and thus higher M-s, SAR, and r(2) values, which can serve as a better candidate for hyperthermia and magnetic resonance imaging.
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