colloidal carbon

https://doi.org/10.1351/goldbook.C01173
A particulate carbon with particle sizes below ca.1000 nm in at least one dimension.
Note:
@[email protected] carbon exists in several morphologically distinct forms.
Source:
PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 486 (https://doi.org/10.1351/pac199567030473)