期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 311, 期 1, 页码 17-21出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.11.158
关键词
magnetic fluids; water carrier; magnetite nanoparticles; superparamagnetic particles; steric stabilization; light scattering; small angle neutron scattering; colloidal stability; magnetorheological behavior; biocompatible nanofluids
Magnetic fluids (MFs), prepared by chemical co-precipitation followed by double layer steric and electrostatic (combined) stabilization of magnetite nanoparticles dispersed in water, are presented. Several combinations of surfactants with different chain lengths (lauric acid (LA), myristic acid (MA), oleic acid (OA) and dodecyl-benzene-sulphonic acid (DBS)) were used, such as LA + LA, MA + MA, LA + DBS, MA + DBS, OA + DBS, OA + OA and DBS + DBS. Static light scattering, transmission electron microscopy, small angle neutron scattering, magnetic and magneto-rheological measurements revealed that MFs with MA + MA or LA + LA biocompatible double layer covered magnetite nanoparticles are the most stable colloidal systems among the investigated samples, and thus suitable for biomedical applications. (C) 2006 Elsevier B.V. All rights reserved.
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