Magnetic monolayer film of oleic acid-stabilized Fe3O4 particles fabricated via Langmuir-Blodgett technique
2009; Elsevier BV; Volume: 518; Issue: 1 Linguagem: Inglês
10.1016/j.tsf.2009.07.052
ISSN1879-2731
AutoresChongju Liu, Yan Shan, Yanlou Zhu, Kezheng Chen,
Tópico(s)Gold and Silver Nanoparticles Synthesis and Applications
ResumoThe fabrication of monolayer film of surfactant-stabilized magnetic Fe3O4 particles with a size range of 90–150 nm via the Langmuir-Blodgett method is described in this paper. Magnetic Fe3O4 particles coated with oleic acid were firstly synthesized by a hydrothermal process, and then the particles were dispersed into chloroform. After that, the Fe3O4 suspension was spread to the interface of air/water and transferred to the glass surface. The formation of the Langmuir monolayer of oleic acid-stabilized Fe3O4 particles at air/water interface was revealed with the pressure-area isotherm curves. The results of the surface pressure-area isotherm and Atomic Force Microscopy showed that this film is a well compressed monolayer of 2-dimensional Fe3O4 particles assembly. Magnetometry results showed that the saturation magnetization of Fe3O4 magnetic particles is 86.1 A·m2/kg at room temperature with an applied field of 0.6 T.
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