Synthesis of Water-soluble Fe3O4 Nanocrystals with a Phase-transfer Method

Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (12): 1381-1386. Next Articles

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相转移方法制备水溶性Fe₃O₄纳米晶

周长华¹，李晓民¹，司红磊¹，郭轶²，徐力²，张治军¹，李林松*^,1

(¹河南大学教育部特种功能材料重点实验室开封 475004)
(²吉林大学分子酶与工程教育部重点实验室长春 130021)

投稿日期:2010-12-07 修回日期:2011-01-22 发布日期:2011-02-11
通讯作者: 周长华 E-mail:changhua@henu.edu.cn
基金资助:
近红外纳米晶的合成及应用

Synthesis of Water-soluble Fe₃O₄ Nanocrystals with a Phase-transfer Method

Zhou Changhua¹ Li Xiaomin¹ Si Honglei¹ Guo Yi² Xu Li² Zhang Zhijun¹ Li Linsong*^,1

(¹Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004)
(²Key Laboratory for Molecular Enzymology and Engineering, Ministry of Education, Jilin University, Changchun 130021)

Received:2010-12-07 Revised:2011-01-22 Published:2011-02-11

Hydrophobic Fe₃O₄ nanocrystals with superparamagnetic behavior were synthesized in an organic solvent. High quality water-soluble Fe₃O₄ nanocrystals were then prepared by a phase transfer method, in which amphiphilic oligomers (polymaleic acid aliphatic amine ester) was used as surface coating agents. The obtained aqueous Fe₃O₄ nanocrystals were characterized with transmission electron microscopy, Fourier transform infrared spectroscopy, thermal gravimetric analysis, and dynamic light scattering. A solution of Fe₃O₄ nanocrystals in water showed expected superparamagnetic behavior when subjected to an external magnetic field. We found that hydrophobic ester chain length of the amphiphilic oligomer can dramatically affect the phase transfer efficiency, which was explained by the impact of local hydrophobic environment on the stability of nanocrystals in water. A biocompatible test showed that the water-soluble Fe₃O₄ were very stable in various physiological conditions without particle aggregation.

Key words: polymaleic acid aliphatic amine ester, water-soluble, phase transfer, Fe₃O₄ nanocrystals

Cite this article

ZHOU Chang-Hua, LI Xiao-Min, SI Hong-Lei, GUO Yi, XU Li, ZHANG Zhi-Jun, LI Lin-Song. Synthesis of Water-soluble Fe₃O₄ Nanocrystals with a Phase-transfer Method[J]. Acta Chimica Sinica, 2011, 69(12): 1381-1386.

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相转移方法制备水溶性Fe₃O₄纳米晶

Synthesis of Water-soluble Fe₃O₄ Nanocrystals with a Phase-transfer Method

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相转移方法制备水溶性Fe3O4纳米晶