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E. FOCANICI1,* , A. CÎRLESCU1, V. NICA1, D. CREANGA1, N. SULITANU1
Colloidal magnetic particles based on magnetite and cobalt ferrite were prepared and characterized aiming to reveal their suitability for several applications, especially in the biomedical field and biotechnology. Sodium oleate (C17H33COONa) shell was intended to stabilize the magnetic particles into the aqueous suspensions in order to get stable ferrofluids by preventing the agglomeration in gravitational but especially in magnetic field gradients. The application of usual physical methods (Xray powder diffraction, vibrating sample magnetometry and scanning electron microscopy (SEM)) allowed the assessing of some material features. The Bragg reflection curves showed the pattern characteristic of the cubic spinel structure and the specific size for both ferrophase samples. The magnetization curves and ferrophase volume fraction were comparatively discussed. The SEM image analysis evidenced the good granularity of both magnetite and cobalt ferrite.
Ferrofluid, Chemical co-precipitation, Superparamagnetic behavior.
E. FOCANICI, A. CÎRLESCU, V. NICA, D. CREANGA, N. SULITANU, Comparative study of magnetite and cobalt ferrite submicron particles, Optoelectronics and Advanced Materials - Rapid Communications, 3, 4, April 2009, pp.326-329 (2009).
Submitted at: Feb. 3, 2009
Accepted at: April 23, 2009
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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