Table 2 Properties of nano particles (alumina (Al2 O3)).

From: Prediction of performance and emission features of diesel engine using alumina nanoparticles with neem oil biodiesel based on advanced ML algorithms

Particle size

 < 50 nm

Purity

99.9%

Form

Powder

Colour

White

Surface area

12–18 m2/g

Density

3.9 g/cm3