Use of CdS quantum dot-functionalized cellulose nanocrystal films for anti-counterfeiting applications

• DOI: 10.1039/c6nr03039d
• Publication Date: 2016-06-06T08:34:12Z
• Authors: L. Chen; C. Lai; R. Marchewka; R. M. Berry; K. C. Tam
• Keywords: Nanoporous

Structural colors and photoluminescence have been widely used for anti-counterfeiting security applications. We report the first time use of CdS quantum dot (QD)-functionalized cellulose nanocrystals (CNCs) as building blocks to fabricate nanothin films via layer-by-layer (LBL) self-assembly Both negatively- positively-charged CNC/QD nanohybrids with a high colloidal stability narrow particle size distribution were prepared. The controllable LBL coating process was characterized by scanning electron microscopy ellipsometry. rigid structure CNCs leads nanoporous structured on poly(ethylene terephthalate) (PET) substrates transmittance (above 70%) over entire range visible light also resulted in increased hydrophilicity (contact angles ∼40 degrees). Nanothin PET showed good flexibility enhanced both water ethanol. modified structural from thin-film interference QDs can be