Ferrite nanoparticle clusters with narrow size distribution consisting of superparamagnetic oxide nanoparticles ( ~ 80 maghemite superparamagnetic nanoparticles per bead ) coated with a silica shell have several advantages over metallic nanoparticles:
12.
Although extremely small amounts of dust have adhered to the magnets so far, Knudsen said the early indication is that the particles contain significant amounts of the mineral maghemite, a weathering byproduct of iron.
13.
Recent advances show that MWNT decorated with maghemite nanoparticles can be oriented in a magnetic field and enhance the electrical properties of the composite material in the direction of the field for use in electric motor brushes.
14.
This kiln uses diesel as a reductant to generate carbon monoxide, which reacts with haematite and other iron oxides in the feed at approximately 700�C, to create magnetite or maghemite whilst leaving other minerals largely unaffected.
15.
Though a chemical analysis of the dust particles collected by magnets on Pathfinder remains to be done, early data indicates these particles may consist of maghemite, a strongly magnetic iron compound, cemented onto particles of clay.
16.
Images of many of the silica-rich rocks showed that they contained a strongly magnetic iron-oxide mineral called maghemite, which forms in water-rich environments on Earth and probably were formed the same way on Mars.
17.
A preliminary look at the magnetic dust, which collects on small magnets where it can be photographed by the lander's camera, shows that it may be a mineral called maghemite, the material used for the coating of hard disks in home computers.
