Modification of Cellulose Nanofibrils with Luminescent Carbon Dots

Publication year: 2014
Authors: Junkka K. 1, Guo J. 1, Filpponen I. 1, Lainen J. 1, Rojas O.J. 1,2
Affiliations:

1 - School of Chemical Technology, Department of Forest Products Technology, Aalto University, P.O. Box 16300, 00076 Aalto, Finland              
2 - Departments of Forest Biomaterials and Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States

Published in: Biomacromolecules, 2014, Vol. 15 (3), p. 876–881
doi: dx.doi.org/10.1021/bm4017176

ABSTRACT:
Films and hydrogels consisting of cellulose nanofibrils (CNF) were modified by covalent EDC/NHS coupling of luminescent, water-dispersible carbon dots (CDs). Quartz crystal microgravimetry with dissipation monitoring (QCM-D) and surface plasmon resonance (SPR) were used to investigate the attachment of CDs on carboxymethylated CNF (CM-CNF). As the first reported use of CD in nanocellulose products, we provide proof-of-concept for the synthesis of transparent and fluorescent nanopaper and for its tunable luminescence as confirmed by confocal microscopy imaging.


MP-SPR keywords: carboxymethylated CNF (CM-CNF), cellulose nanofibrils (CNF), luminescent, QCM-D, transparent and fluorescent nanopaper, water-dispersible carbon dots (CDs)