Sterically stabilized water based magnetic fluids: Synthesis,structure and properties |
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| Authors: | Doina Bica,Ladislau Vé ká s,Mikhail V. Avdeev,Oana Marinică,Vlad Socoliuc,Maria Bălăsoiu,Vasil M. Garamus |
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| Affiliation: | 1. Laboratory of Magnetic Fluids, Center for Fundamental and Advanced Technical Research, Romanian Academy, Timisoara Division, Bd. Mihai Viteazul 24, 300223 Timisoara, Romania;2. Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, Dubna, Russia;3. National Centre for Engineering of Systems with Complex Fluids, University Politehnica Timisoara, Bd. Mihai Viteazul 1, 300222 Timisoara, Romania;4. National Institute R&D for Electrochemistry and Condensed Matter, Str. Diaconu Coressi 144, 300588 Timisoara, Romania;5. GKSS Research Centre, Geesthacht, Germany |
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| Abstract: | 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. |
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| Keywords: | 75.50.Mm 78.20.Fm 82.70.Dd |
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