Substance whose particles are in the size range of 1 to
\(\pu{100 nm}\).
Note:
This may have chemical properties different from those of the corresponding bulk material.
Source:
PAC, 2022, 94, 353. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 2021)' on page 470 (https://doi.org/10.1515/pac-2018-1010)