Multimodal dynamic and unclonable anti-counterfeiting using robust diamond microparticles on heterogeneous substrate

Tongtong Zhang, Lingzhi Wang, Jing Wang, Zhongqiang Wang, Madhav Gupta, Xuyun Guo, Ye Zhu, Yau Chuen Yiu, Tony K. C. Hui, Yan Zhou, Can Li, Dangyuan Lei, Kwai Hei Li, Xinqiang Wang, Qi Wang (), Lei Shao () and Zhiqin Chu ()
Additional contact information
Tongtong Zhang: The University of Hong Kong
Lingzhi Wang: The University of Hong Kong
Jing Wang: Sun Yat-sen University
Zhongqiang Wang: Dongguan Institute of Opto-Electronics, Peking University
Madhav Gupta: The University of Hong Kong
Xuyun Guo: Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom
Ye Zhu: Research Institute for Smart Energy, The Hong Kong Polytechnic University, Hung Hom
Yau Chuen Yiu: The University of Hong Kong
Tony K. C. Hui: Primemax Biotech Limited
Yan Zhou: The Chinese University of Hong Kong
Can Li: The University of Hong Kong
Dangyuan Lei: City University of Hong Kong
Kwai Hei Li: Southern University of Science and Technology
Xinqiang Wang: Dongguan Institute of Opto-Electronics, Peking University
Qi Wang: Dongguan Institute of Opto-Electronics, Peking University
Lei Shao: Sun Yat-sen University
Zhiqin Chu: The University of Hong Kong

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract The growing prevalence of counterfeit products worldwide poses serious threats to economic security and human health. Developing advanced anti-counterfeiting materials with physical unclonable functions offers an attractive defense strategy. Here, we report multimodal, dynamic and unclonable anti-counterfeiting labels based on diamond microparticles containing silicon-vacancy centers. These chaotic microparticles are heterogeneously grown on silicon substrate by chemical vapor deposition, facilitating low-cost scalable fabrication. The intrinsically unclonable functions are introduced by the randomized features of each particle. The highly stable signals of photoluminescence from silicon-vacancy centers and light scattering from diamond microparticles can enable high-capacity optical encoding. Moreover, time-dependent encoding is achieved by modulating photoluminescence signals of silicon-vacancy centers via air oxidation. Exploiting the robustness of diamond, the developed labels exhibit ultrahigh stability in extreme application scenarios, including harsh chemical environments, high temperature, mechanical abrasion, and ultraviolet irradiation. Hence, our proposed system can be practically applied immediately as anti-counterfeiting labels in diverse fields.

Date: 2023
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DOI: 10.1038/s41467-023-38178-1

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