Surface roughness at the nanoscale alters light scattering, heat transfer, and fluid flow

https://businessofhome.com/articles/new-executives-at-stark-vanguard-arhaus-1st-dibs-and-more

Surface roughness at the nanoscale alters light scattering, heat transfer, and fluid flow, enabling engineered matter surfaces that tailor optical gloss, drag, and thermal emissivity.