Improved antifungal activity and stability of chitosan nanofibers using cellulose nanocrystal on banknote papers.

•Using new combination of nanomaterials as anti-fungal.•Obtaining good results by using both nanomaterials as anti-fungal.•Investigation of the effect of CNC and CNF as anti-fungal agents on the banknote paper alone.•The results could open up the new windows to use as anti-fungal bio-nanomaterials in paper making or banknotes applications.•Using very important test on the cell growing that we call it MTT.