Citation: Nong Yue He, Ya Fei Guo, Yan Deng, Zhi Fei Wang, Song Li, Hong Na Liu. Carbon encapsulated magnetic nanoparticles produced by hydrothermal reaction[J]. Chinese Chemical Letters, ;2007, 18(4): 487-490. doi: 10.1016/j.cclet.2007.01.042 shu

Carbon encapsulated magnetic nanoparticles produced by hydrothermal reaction

Nong Yue He ^a,b, ,
Ya Fei Guo ^a ,
Yan Deng ^b ,
Zhi Fei Wang ^a ,
Song Li ^a ,
Hong Na Liu ^b

a State Key Laboratory of Bioelectronics, Southeast University, Nanjing 210096, China;
b Key Laboratory of Green-Packaging and Application of Bionanotechnology of Hunan Province, Zhuzhou Institute of Technology, Zhuzhou 412008, China

Received Date: 13 October 2006

Fund Project: This work was financially supported by the NNSF of China (Nos. 60571032,90606027) and the Doctoral Program of Higher Education for Funding 20050286014 and National 863 project (No. 2006AA02Z133).

Carbon encapsulated magnetic nanoparticles (CEMNs) were synthesized by heating an aqueous glucose solution containing Fe-Au (Au coated Fe nanoparticles) nanoparticles at 160-180℃ for 2 h. This novel hydrothermal approach is not only simple but also provides the surface of CEMNs with functional groups like -OH. The formation of carbon encapsulated magnetic nanoparticles was not favored when using pure Fe nanoparticles as cores because of the oxidation of Fe nanoparticles by H₂O during the reaction and,therefore, the surfaces of the naked Fe nanoparticles had to be coated by Au shell in advance. TEM, XRD, XPS and VSM measurments characterized that they were uniform carbon spheres containing some embedded Fe-Au nanoparticles, with a saturation of 14.6 emu/g and the size of the typical product is~350 nm.
- Carbon encapsulated magnetic nanoparticles,
- Hydrothermal reaction,
- Gold shell
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