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The area of ferrofluids is quite new, and very interesting. Ferrofluid is made of small particles (~10nm) of magnetitie (Fe3O4) surrounded by a surfactant such as tetramethylammonium hydroxide. The surfactant is needed to keep the particles of magnetitie from agglomerating (clumping together) due to magnetic and van der Waals interactions. It's like having a slippery skin around the small particle of magnetitie. Thermal motion helps, but is not sufficient by itself. A group of these prepared particles is like a solution that acts like a medium density liquid which is affected by magnetic fields. When a magnet is brought near it, the liquid spl have worked at Prof.
Approximate Word count = 423
Approximate Pages = 1.7
(250 words per page double spaced)
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