Nanocellulose has emerged as a promising material for many biomedical applications.
Depending on the source of the nanocellulose and the chemical treatment, the resulting
optical properties can vary significantly. In particular, autofluorescence can exist in various
wavelength ranges. Except for chlorophyll related autofluorescence, all other studies have
reported intrinsic fluorescence in the blue to yellow range. However, this range coincides
with the autofluorescence range of cells. Here, we report on cell friendly red fluorescence of …