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Abstract: The researchers in this paper were the first to report that the thermal conductivity of the heat transfer nanofluids has the ability to be enhanced by an external magnetic field. This is possible due to carbon nanotubes and magnetic-field-sensitive nanoparticles of Fe2O3. It was discovered that the Fe2O3 nanoparticles form chains when exposed to magnetic fields, which allows the nanotubes to connect. As the nanotubes connect, the thermal conductivity of the nanofluid improves drastically. Researchers also discovered that when large clumps form, instead of chains, the thermal conductivity of the nanofluid decreases.

Reference: Synthetic Metals, 157, 10-12 (2007) 437-440

DOI: 10.1016/j.synthmet.2007.05.009