Journal
NEW CARBON MATERIALS
Volume 25, Issue 3, Pages 192-198Publisher
ELSEVIER
DOI: 10.1016/S1872-5805(09)60026-3
Keywords
Fe3O4 nanoparticles; Carbon nanotubes; Nanomaterials; Magnetic property; Saturation magnetization
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Funding
- National Natural Science Foundation of China [20876100, 20736004]
- State Key Lab. of Multiphase Complex Systems of the Chinese Academy of Science [2006-5]
- State Key Laboratory Of Coral Conversion of CAS [2006-902]
- Post-doctoral Science Fundation of Jiangsu Prov.
- National Post-doctoral Science Fundation [20090451176]
- Commission of Science and Technology of Suzhou Municipality [YJS0917, SG0978]
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Carbon nanotubes filled with magnetic materials are very interesting as new materials for applications in biomedicine. A simple and efficient method was developed to encapsulate Fe3O4 nanoparticles in multiwalled carbon nanotubes (MWCNTs). Transmission and scanning electron microscopy, energy dispersive X-ray analysis, and X-ray powder diffraction measurements confirmed that the Fe3O4 nanoparticles are encapsulated in the MWCNTs. The magnetic properties of the MWCNTs and the Fe3O4-filled MWCNTs were measured using a vibrating sample magnetometer. Results showed that the Fe3O4-filled MWCNTs exhibited superparamagnetism at room temperature and possessed a higher saturation magnetization (Ms) (around 13.15 emu/g) than that of the unfilled ones (around 0.35 emu/g). The MWCNTs encapsulating Fe3O4 nanoparticles have potential applications in engineering and medicine.
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