Existence of Carbon Nanodots in Human Blood.

Presence of carbon nanostructures (dots of 2-3 nm of diameter) in human blood plasma have been identified for the first time. The observed particles are N-doped carbon dots having surface active oxygen functional groups. This functionalized carbonaceous nanostructure may have been originated through catabolic processes of consumed foods and beverages. It may take part in different catalytic activities of biomolecules in cellular system necessary for normal physiological function which is unexplored yet.