Colloidal suspensions of ultra-fine metallic or non-metallic particles in a fluid are referred to as nanofluids. It is well known for its high thermal conductivity and improved heat transfer medium reactivity, notwithstanding its other properties.
Metallic nanofluids and non-metallic nanofluids are the two types of nanofluids that exist.
- Metallic nanofluids are created by dispersing metal nanoparticles such as aluminum, copper, nickel, and other metals
- Whereas nonmetallic nanofluids are created by dispersing nonmetal nanoparticles such as metal oxides, various allotropes of carbon (Graphene, CNT), and other nonmetals.
"Colloidal suspensions of ultra-fine metallic or non-metallic particles in a fluid are referred to as nanofluids."
That depends on your definition of nanofluid. A lot of people (notably outside of the pharmaceutical industry or people educated in colloid science departments) refer to nanofluid as a fluid containing dispersed particles of which at least one dimension is less than 100nm. A similar fluid containing 500nm particles would becalled a colloidal suspension (well, I wouldn't, I'd call it a colloidal dispersion) but would not be a nanofluid.
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