Table 1 Basic properties of the base fluid, commercially named as Helisol 5A, and Pt nanoparticles.

Density at 25 °C (kg m⁻³)

 ~ 920

Size (nm)

 < 50

Viscosity at 25 °C (mPa s)

4–6

Boiling point (°C)

3827

Eq. vapour pressure (kPa)

0.03

Melting point (°C)

1772

Heat capacity at 25 °C (J g^-1 K⁻¹)

1.483

Density at 25 °C (kg m⁻³)

21,450

Thermal conductivity at 25 °C (W m⁻¹ K⁻¹)

0.1276

Resistivity at 25 °C (μΩ cm)

10.6