Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 42, 2019
Previous Article Next Article

Self-assembly of coordination polymers on plasmonic surfaces for computer vision decodable, unclonable and colorful security labels

Author affiliations

Abstract

Incorporating security labels with physical unclonable functions (PUFs) into products is considered as the most effective anti-counterfeiting measure. Here we reported a PUF-based security label composed of random colorful patterns. The security label was fabricated through self-assembly of coordination polymers – a cupric bromide complex of pyrazine 1,4-dioxide – on lithographically defined plasmonic surfaces. The coordination polymer exhibits excitation wavelength dependent fluorescence fingerprints, which enables encoding spectral information in the polymer. The fluorescence peaks of each spectrum can be easily converted to a unique anti-counterfeiting barcode. The developed security label also carries 2D graphical information, which can be visualized under bright-field, dark-field and fluorescence multifunctional microscopy. It is multicolored with high contrast under the bright/dark-field modes and single color under fluorescence mode. The multicolors originate from polymer-thickness dependent optical interference. The encryption with colors on a 50 μm square produces a minimum of 3739 PUF codes for the realized authentication system. Moreover, we developed a convenient and reliable authentication strategy based on the computer vision technique to verify the colorful PUF patterns with different definition, rotation angles, brightness, magnification and a mixture of these factors. A high correct validation rate of 100% is achieved using a match threshold of 0.3.

Graphical abstract: Self-assembly of coordination polymers on plasmonic surfaces for computer vision decodable, unclonable and colorful security labels

Back to tab navigation

Supplementary files

Article information


Submitted
20 Aug 2019
Accepted
07 Oct 2019
First published
10 Oct 2019

J. Mater. Chem. C, 2019,7, 13040-13046
Article type
Communication

Self-assembly of coordination polymers on plasmonic surfaces for computer vision decodable, unclonable and colorful security labels

F. Han, Y. Liu, F. Li, Y. Lu, H. Cheng, Y. Lin, T. Zhao, S. H. Ng, U. Bach and Y. Zheng, J. Mater. Chem. C, 2019, 7, 13040
DOI: 10.1039/C9TC04615A

Social activity

Search articles by author

Spotlight

Advertisements