what is ferrofluid?

Answer 1

http://jchemed.chem.wisc.edu/JCESoft/CCA/CCA2/MAIN/FEFLUID/CD2R1.HTM
http://mrsec.wisc.edu/Edetc/cineplex/ff/index.html
http://www.dansdata.com/magnets.htm
http://www.99express.com/posts/ferrofluid_sculptures.htm

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Answer 2

A ferrofluid is a liquid which becomes strongly polarised in the presence of a magnetic field. Ferrofluids are composed of nanoscale ferromagnetic particles suspended in a carrier fluid, usually an organic solvent or water. The ferromagnetic nano-particles are coated with a surfactant to prevent their agglomeration (due to van der Waals and magnetic forces). Although the name suggests otherwise, ferrofluids do not display ferromagnetism, since they do not retain magnetisation in the absence of an externally-applied field. In fact, ferrofluids display paramagnetism, and are often referred as being "superparamagnetic" due to their large magnetic susceptibility.

Answer 3

A ferrofluid is a liquid that becomes strongly polarised in the presence of a magnetic field. It is made of nanoscale ferromagnetic particles suspended in fluid that's known as a "carrier fluid"which is a fluid usually of some type of organic solvent or water...