Nanotechnology: Composition of ferromagnetic fluid
What are ferromagnetic fluids?
Understand the modern definition of nanotechnology. Learn about a nano-material (Ferro fluid) and its applications in modern nanotechnology. Create magnetic nanoparticles and see their behavior in a magnetic field.
There are several materials for 15 groups. Includes teacher guide and student worksheets (in English).
The box includes:
Chlorine iron 1gr
Iron chloride 22gr
Hydrochloric acid 10N 20ml
Ammonium hydroxide 25ml
Tetramethyl ammonium 20gr
Pipettes
Petri dish
You will also need:
100 mL heating glass
Volumetric cylinder 10 mL
Glass stirring rod
Safety glasses
Gloves
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A ferrofluid is a liquid that is strongly magnetized in the presence of a magnetic field. Iron was discovered in 1963 by NASA’s Steve Papell as a liquid rocket fuel that could be pumped to the mouth of a pump in a shallow environment by applying a magnetic field.
Iron fluids are colloidal liquids made of ferromagnetic or ferromagnetic nanoscale particle particles suspended in a fluid carrier (usually an organic solvent or water). Each tiny particle is completely covered with a surfactant to prevent buildup. Large ferromagnetic particles can be removed from the homogeneous colloidal mixture, forming a separate group of magnetic dust when exposed to strong magnetic fields. The magnetic attraction of nanoparticles is sufficient so that the van der Waals forces of the surfactant are sufficient to prevent magnetic accumulation. Iron fluids usually do not retain magnetism in the absence of an externally applied field and are therefore often classified as “hyperparamagnetics” rather than iron magnets.
The difference between iron and magnetic fluids (MR fluids) is in the particle size. Particles in an iron liquid consist mainly of nanoparticles that oscillate with Brown motion and do not generally settle under normal conditions. The particles of a magnetic resonance fluid consist mainly of particles of micrometric size that are too heavy to hold the Brown motion in motion and therefore settle with time due to the inherent density difference between the particles and the carrier fluid. As a result, these two fluids have different applications.