What is "nanodiamond"

n. 1 A nanoscale fragment of diamond 2 (context organic chemistry English) A diamondoid

Nanodiamonds are diamonds with a size below 1 micrometre. They can be produced by impact events such as an explosion or meteoritic impacts.

A single imperfection can give a nanodiamond an isolated color center, which lets it function as single, trapped atom. Relative to the defect size, they have huge surface areas that allow them to bond with a variety of other materials. Their non-toxicity means that nanodiamonds may be useful in biomedical and mechanical applications.