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Magnetite (Fe 3 O 4 ) nanotubes were prepared by reducing synthesized hematite (α-Fe 2 O 3 ) nanotubes in 5% H 2 +95% Ar atmosphere, and then maghemite (γ-Fe 2 O 3 ) nanotubes were obtained by re-oxidizing the Fe 3 O 4 nanotubes. The nanotube structure was kept from collapsing or sintering throughout the high temperature reducing...
A simple chemical route is developed to generate maghemite (γ-Fe 2 O 3 ) nano-particles, dispersed in organic solvents via a thermal decomposition of an iron–hydroxy oleate precursor. An iron–hydroxy oleate precursor was generated by chemical reaction of mixed iron nitrate and oleic acid in ethanol with 30% NH 3 solution with continuous stirring at room temperature. The precursor...
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