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FERROFLUIDS STABLE IN NEUTRAL MEDIA AND FERROFLUIDS EMPLOYING SURFACE-MODIFIED PARTICLES |
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Principal Investigator : E. DUGUET.
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The invention relates to aqueous dispersions, comprising particles based on a magnetic iron oxide with dimensions of </= 20 nm, the surface of which is modified by the grafting of aminated groups R with a covalent bonding to the surface of said particles, wherein the isoelectronic point of particles with such a modified surface is >/= 10.
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