Structural and Magnetic Studies of Annealed Iron Oxide Nanoparticles

One-step synthesis of γ-Fe2O3/Fe3O4 nanocomposite for sensitive electrochemical detection of hydrogen peroxide

“…The morphology of the γ -Fe 2 O 3 /Fe 3 O 4 nanocomposite was evaluated by SEM. According to the previous studies reported in the literature, it is difficult to distinguish between magnetite and maghemite due to their similar structural and magnetic properties [37] . Fig.…”

Surface modification of magnetic nanoparticles by bacteriophages and ionic liquids precursors

“…Then, the annealing of magnetite nanoparticles leads to a mixture of maghemite (γ-Fe 2 O 3 ) and hematite (α-Fe 2 O 3 ) affecting the magnetic properties. 54 However, in our research, annealing would destroy the structure of phage capsids, while the synthesis temperature close to 60 °C could be too high for the structure of bacterial viruses, especially for Φ6 phage whose capsids are covered with a lipid envelope. Therefore, the temperature was lowered to 40 °C.…”

Adsorptive properties and on-demand magnetic response of lignin@Fe3O4 nanoparticles at castor oil–water interfaces

“…1d) demonstrated the primary Bragg reections, located at 30°, 35°, 43°, 53°, 57°, 63°, that corresponded to the face-center cubic (FCC) Miller indices of ( 220), (311), (400), ( 422), (511), and (440) of Fe 3 O 4 nanoparticles, respectively. 47,51,55 The neat IONPs and lignin@Fe 3 O 4 had the same six peaks, while the KL spectrum only shared one peak at 35°. Using the Scherrer Equation (ESI eqn (S2) †), the crystallite size of the lignin@Fe 3 O 4 nanoparticles at 35°was determined to be 18.4 nm (ESI eqn (S2) †) since the FWHM was 0.009234 radians and the Bragg diffraction angle was 0.61897 radians.…”