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Ferrite Nanoparticles for Ferrofluids; Properties of Magnets

Ferrite Nanoparticles for Ferrofluids; Properties of Magnets. Objectives: --Synthesize ferrimagnetic nanoparticle fluid. --Observe differences in magnetic behavior between bulk magnets and nanoparticles. Examples of Nanotechnology. ZnO nanowire UV lasers: 100 nm diameter.

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Ferrite Nanoparticles for Ferrofluids; Properties of Magnets

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  1. Ferrite Nanoparticles for Ferrofluids; Properties of Magnets Objectives: --Synthesize ferrimagnetic nanoparticle fluid --Observe differences in magnetic behavior between bulk magnets and nanoparticles

  2. Examples of Nanotechnology ZnO nanowire UV lasers: 100 nm diameter

  3. 100 nm Silicon Features

  4. 100 nm Silicon Features

  5. Ferrite (Magnetite), Fe3O4 --(Fe+3)2(Fe+2)O4 --Spinel structure: Fe coordinated by 4 or 6 oxygen atoms --Compass needle of ancient world: “lodestone” --Ferrimagnetic

  6. Types of Magnetism In Inorganic Compounds

  7. Biomineralization of Ferrite Nanoparticles

  8. Biomineralization of Ferrite Nanoparticles

  9. Ferrite Nanoparticle Synthesis --Mixture of Fe+3 and Fe+2 in H2O: provides O for oxide formation --HCl: solvates iron chlorides, prevent rapid precipitation of oxide --Hydrolysis/condensation reactions, catalyzed by water --NH3 scavenges Cl- ligands and protons: NH4+Cl-

  10. Summary Behavior of: Nanoparticle magnetic domains within fluid vs. Bulk magnetic solids

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