Anti-counterfeiting patterns encrypted with multi-mode luminescent nanotaggants

Tianying Sun; Bingzhe Xu; Bing Chen; Xian Chen; Mingyu Li; Peng Shi; Feng Wang

doi:10.1039/c6nr09083d

Anti-counterfeiting patterns encrypted with multi-mode luminescent nanotaggants

Nanoscale. 2017 Feb 23;9(8):2701-2705. doi: 10.1039/c6nr09083d.

Authors

Tianying Sun¹, Bingzhe Xu², Bing Chen¹, Xian Chen¹, Mingyu Li³, Peng Shi², Feng Wang⁴

Affiliations

¹ Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China. fwang24@cityu.edu.hk.
² Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China. pengshi@cityu.edu.hk.
³ State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China. limy@zju.edu.cn.
⁴ Department of Physics and Materials Science, City University of Hong Kong, 83 Tat Chee Avenue, Hong Kong SAR, China. fwang24@cityu.edu.hk and City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.

PMID: 28186524
DOI: 10.1039/c6nr09083d

Abstract

Anti-counterfeiting patterns are encrypted with nanotaggants that are selectively excited at distinct wavelengths. Decryption is realized by examining the temporal color or graphic responses of the pattern under various illumination wavelengths. The covert color and graphic codes that are designable through control of the nanotaggant composition are expected to provide high-level security.