A novel method to prepare magnetic nanoparticles: precipitation in bicontinuous microemulsions

Chitosan‐Coated Magnetic Nanoparticles with Low Chitosan Content Prepared in One‐Step

“…Figure 1 also includes the standard patterns of magnetite and maghemite, which were taken from the library of our X-ray equipment. This obeys to the fact that precipitation reactions from Fe +2 + Fe +3 aqueous solutions using aqueous ammonia usually render a mixture of magnetite and maghemite [18,19]. As it can be seen in Figure 1, XRDPs of magnetite and maghemite display the same signals pattern in the range 30 to 75 2θ • .…”

New Trends on the Synthesis of Inorganic Nanoparticles Using Microemulsions as Confined Reaction Media

“…Lopez et al (Esquivel et al, 2007;Loo et al, 2008) have reported this approach for the synthesis of magnetic nanoparticles. A microemulsion system based on cationic surfactants was used for the synthesis of a mixture of maghemite/magnetite nanoparticles, using bicontinuous microemulsions at 80°C, with 30-40 wt% of aqueous phase.…”

Prospects for the incorporation of cobalt into α-Fe2O3 nanorods during hydrothermal synthesis

“…Crystalline a-Fe 2 O 3 NPs and NRs, as seen in Samples S1-S4, are known to grow from FeCl 3 solution via an intermediate b-FeOOH phase at low pH (*2) [13][14][15][16][17][18][19][20][21][22][23][24][25], as summarised by the following generalised equations:…”

“…Aqueous iron (III) chloride (FeCl 3 ) solution is well established as a simple precursor for the formation of monodispersed a-Fe 2 O 3 NPs [14][15][16][17][18]. Further, a small addition of phosphate anions has been shown to mediate the anisotropic growth of a-Fe 2 O 3 , leading to the development of acicular (lenticular in projection) NRs [19][20][21].…”