Nano lubricants work by integrating nanoparticles into base lubricants. These nanoparticles can fill in micro-cracks and surface irregularities in machine components, creating a smoother surface and reducing friction. Additionally, the nanoparticles can form a protective coating that reduces wear and tear. The most commonly used nanoparticles in these lubricants include fullerenes, metal oxides, and carbon nanotubes.